Acute Paediatrics — MCQs

Q: A 8-year-old child presents with fever, sore throat, and a fine sandpaper-like rash. The tongue appears red with prominent papillae. What is the most likely diagnosis?

Scarlet fever. ***Scarlet fever*** - The classic clinical presentation of **fever**, **sore throat**, a **fine, erythematous, sandpaper-like rash**, and a **red tongue with prominent papillae** (often called **strawberry tongue**) is highly characteristic of scarlet fever. - This condition is caused by **Group A *Streptococcus*** (*S. pyogenes*) releasing **pyrogenic exotoxins** (erythrogenic toxins) which are responsible for the distinctive rash and tongue appearance. *Viral exanthem* - This is a generic term for a rash accompanying a viral infection, but it typically lacks the very specific combination of a **sandpaper rash** and **strawberry tongue** seen in this case. - Viral exanthems generally do not present with the severe **pharyngitis** and the characteristic toxin-mediated rash of scarlet fever. *Kawasaki disease* - Key diagnostic criteria for Kawasaki disease include persistent fever for at least 5 days, **conjunctival injection**, oral changes (e.g., cracked lips, but **strawberry tongue** is less specific), and often **polymorphous rash**, but not typically a **sandpaper-like rash**. - While it can cause oral changes, it is not preceded by **streptococcal pharyngitis** and does not feature the specific sandpaper rash caused by streptococcal exotoxins. *Measles* - Measles (Rubeola) is characterized by the 3 Cs: **cough, coryza, and conjunctivitis**, followed by a descending, **maculopapular rash** that is distinct from a sandpaper rash. - Unlike scarlet fever, measles classically presents with **Koplik spots** (small white spots on the buccal mucosa) before the rash appears and does not cause a sandpaper rash or a typical strawberry tongue. *Erythema infectiosum* - Also known as Fifth Disease, it is caused by **Parvovirus B19** and classically presents with a distinctive **

Q: A 8-year-old child presents with fever, sore throat, and a sandpaper-like rash over the trunk and limbs. The tongue appears red with prominent papillae ("strawberry tongue"). What is the most likely diagnosis?

Scarlet fever. ***Scarlet fever*** - The presentation of fever, sore throat (streptococcal pharyngitis), and a generalized fine papular, **sandpaper-like rash** is pathognomonic for scarlet fever. - The finding of a **strawberry tongue** (red, prominent papillae) is also highly characteristic, resulting from the systemic effects of circulating **pyrogenic exotoxins** produced by *Streptococcus pyogenes*. *Viral exanthem* - While many **viral exanthems** cause fever and rash, they typically lack the characteristic fine, **sandpaper texture** or the associated severe pharyngitis. - The combination of sore throat, sandpaper rash, and specific **strawberry tongue** makes a common viral rash diagnosis highly unlikely. *Kawasaki disease* - This disease presents with high fever unresponsive to antipyretics and signs like **bilateral non-exudative conjunctivitis**, cracked lips, and **cervical lymphadenopathy**. - The specific **sandpaper rash** and severe pharyngitis seen in the patient are not typical features of Kawasaki disease, which carries a risk of **coronary artery aneurysms**. *Measles* - Measles is characterized by the prodrome of cough, coryza, and conjunctivitis, followed by a maculopapular rash that starts on the face and spreads downwards. - The presence of **Koplik spots** (small white spots on the buccal mucosa) precedes the rash in measles, and the rash appearance differs from the fine 'sandpaper' texture. *Erythema infectiosum* - This disease (Fifth Disease, caused by **Parvovirus B19**) is clinically recognized by the initial **slapped cheek appearance**. - The rash then spreads to the extremities, developing a distinct **lacy, reticular pattern**, which contrasts sharply with the generalized, fine, sandpaper rash of scarlet fever.

Q: A 4-year-old child presents with fever, irritability, and neck stiffness. Lumbar puncture shows: opening pressure 25 cmH₂O, WCC 800/μL (90% neutrophils), protein 2.8 g/L, glucose 1.2 mmol/L (serum glucose 6.0 mmol/L). What is the most likely diagnosis?

Bacterial meningitis. ***Bacterial meningitis***- The constellation of **fever**, **neck stiffness**, severely elevated CSF **protein** (2.8 g/L), and profoundly low CSF **glucose** (ratio 0.2) is classic for acute bacterial infection.- The marked CSF pleocytosis (800/μL) with a predominant population of **neutrophils** (90%) indicates a rapidly progressive, pyogenic process.*Viral meningitis*- Characterized by **lymphocytic pleocytosis** (predominant lymphocytes) rather than the neutrophilic dominance seen here.- CSF glucose levels are typically **normal** or only mildly reduced, unlike the severe hypoglycemia reported in this patient.*Tuberculous meningitis*- While associated with low CSF glucose and high protein, it generally presents **subacutely** or chronically over weeks, not acutely.- CSF pleocytosis is usually **lymphocytic** or monocytic, not the acute neutrophilic predominance found in this sample.*Fungal meningitis*- This is rare in immunocompetent children, usually follows an indolent or **chronic** course, and typically presents with **lymphocytic** pleocytosis.- The acute presentation with fever, irritability, and prominent neutrophilia points strongly away from a fungal etiology.*Normal CSF*- Normal CSF findings include an opening pressure 0.6.- All measured parameters (pressure 25, WCC 800, glucose ratio 0.2) are significantly **abnormal**, definitively ruling out normal CSF.

Q: A 3-year-old child presents with a barking cough, inspiratory stridor, and hoarse voice. The symptoms are worse at night. The child is alert and playful. What is the most likely diagnosis?

Croup. ***Croup*** - The presentation of a **barking cough**, **inspiratory stridor**, and **hoarse voice** in a 3-year-old is the classic triad for **Croup** (laryngotracheobronchitis), typically caused by the **Parainfluenza virus**. - Symptoms are typically worse at night due to increased **vagal tone** and decreased ambient humidity, yet the child remains alert and non-toxic, which is characteristic of mild-to-moderate croup. *Epiglottitis* - This condition presents as a medical emergency with rapid onset of **high fever**, severe **dysphagia**, drooling, and a **muffled voice**, but usually lacks the characteristic **barking cough**. - The child with epiglottitis typically appears **toxic**, apprehensive, and prefers the **tripod position**, unlike the alert and playful child described. *Bronchiolitis* - Bronchiolitis is an infection of the small airways, primarily causing **wheezing**, **tachypnea**, and signs of **lower respiratory distress**, usually without stridor or the specific barking cough. - It predominantly affects infants under 2 years of age and is most often caused by **Respiratory Syncytial Virus (RSV)**. *Pneumonia* - This is an infection of the lung parenchyma, presenting with fever, **tachypnea**, and often a productive cough accompanied by focal findings like **crackles** or **dullness** on chest exam. - Pneumonia does not typically cause prominent **inspiratory stridor** or the characteristic **barking cough** associated with upper airway swelling. *Foreign body aspiration* - This diagnosis usually involves a sudden onset of **choking** or coughing, and if the object is lodged in the larynx or trachea, it causes stridor, but the symptoms do not typically fluctuate and worsen specifically **at night**.

Q: A 2-year-old boy with viral-induced wheeze is assessed in the emergency department. He has received salbutamol via spacer but continues to have expiratory wheeze, recession, and a respiratory rate of 50/min. Oxygen saturation is 93% on air. The parents ask whether their child will develop asthma. Which factor most strongly predicts progression from preschool wheeze to persistent childhood asthma?

Eczema or allergic rhinitis in the child. ***Eczema or allergic rhinitis in the child*** - Personal **atopy** (especially **physician-diagnosed eczema**) is identified as a **major criterion** in the **Asthma Predictive Index (API)** for predicting persistent asthma in school-aged children. - A child with recurrent wheeze and allergic comorbidities has a significantly higher probability of having an **allergic phenotype** that persists, compared to isolated **viral-induced wheeze**. *Male gender* - While **male gender** is a risk factor for **preschool wheezing** and airway narrowing in early life, it is not a strong independent predictor of **persistence** into later childhood. - The gender prevalence often **shifts** around puberty, where asthma becomes more common in females. *Early onset of wheeze in the first year of life* - Early-onset wheezing is often associated with **transient early wheezing**, typically caused by **small airway caliber** rather than an asthmatic pathology. - Most children who wheeze only in the first year of life actually see their symptoms resolve (outgrow it) by age 3 to 6. *Parental smoking in the household* - **Environmental tobacco smoke** is a significant trigger for **exacerbations** and reduced lung function, but it is considered a weaker predictor for the development of chronic asthma than **atopic markers**. - It contributes to **airway hyper-responsiveness** but does not define the underlying allergic predisposition required for an asthma diagnosis. *History of bronchiolitis requiring hospitalization* - A history of severe **RSV** or other viral **bronchiolitis** is associated with subsequent wheezing episodes in early childhood, but it is not a specific predictor of **persistent asthma**. - Many infants hospitalized with bronchiolitis do not go on to develop the **atopic airway inflammation** characteristic of true bronchial asthma.

A 9-year-old boy with known asthma presents to the emergency department with an acute exacerbation. Following administration of oxygen, nebulized salbutamol, ipratropium bromide, and oral prednisolone, he remains in respiratory distress with oxygen saturation 92% on high-flow oxygen, peak flow 30% of predicted, and poor respiratory effort. What is the appropriate dose and route of magnesium sulphate administration in this clinical scenario?

A 4-year-old boy presents with sudden onset high fever of 40.2°C, drooling, and severe difficulty swallowing. He is sitting upright, leaning forward with his neck extended, and appears anxious. There is inspiratory stridor and he is reluctant to speak. Oxygen saturation is 96% on air. What is the single most appropriate immediate action?

A 2-year-old boy with viral-induced wheeze is assessed in the emergency department. He has received salbutamol via spacer but continues to have expiratory wheeze, recession, and a respiratory rate of 50/min. Oxygen saturation is 93% on air. The parents ask whether their child will develop asthma. Which factor most strongly predicts progression from preschool wheeze to persistent childhood asthma?

Q10

A 15-month-old child is brought to the emergency department with fever of 39.6°C for 2 hours. The mother reports the child had a brief generalized tonic-clonic seizure lasting approximately 3 minutes at home which resolved spontaneously. The child is now alert and playful with no focal neurological signs. There are no signs of meningism. The seizure occurred on the way up in fever. What is the most important next step in management?

Acute Paediatrics UK Medical PG Practice Questions and MCQs

Question 1: A 8-year-old child presents with fever, sore throat, and a fine sandpaper-like rash. The tongue appears red with prominent papillae. What is the most likely diagnosis?

A. Viral exanthem
B. Scarlet fever (Correct Answer)
C. Kawasaki disease
D. Measles
E. Erythema infectiosum

Explanation: ***Scarlet fever*** - The classic clinical presentation of **fever**, **sore throat**, a **fine, erythematous, sandpaper-like rash**, and a **red tongue with prominent papillae** (often called **strawberry tongue**) is highly characteristic of scarlet fever. - This condition is caused by **Group A *Streptococcus*** (*S. pyogenes*) releasing **pyrogenic exotoxins** (erythrogenic toxins) which are responsible for the distinctive rash and tongue appearance. *Viral exanthem* - This is a generic term for a rash accompanying a viral infection, but it typically lacks the very specific combination of a **sandpaper rash** and **strawberry tongue** seen in this case. - Viral exanthems generally do not present with the severe **pharyngitis** and the characteristic toxin-mediated rash of scarlet fever. *Kawasaki disease* - Key diagnostic criteria for Kawasaki disease include persistent fever for at least 5 days, **conjunctival injection**, oral changes (e.g., cracked lips, but **strawberry tongue** is less specific), and often **polymorphous rash**, but not typically a **sandpaper-like rash**. - While it can cause oral changes, it is not preceded by **streptococcal pharyngitis** and does not feature the specific sandpaper rash caused by streptococcal exotoxins. *Measles* - Measles (Rubeola) is characterized by the 3 Cs: **cough, coryza, and conjunctivitis**, followed by a descending, **maculopapular rash** that is distinct from a sandpaper rash. - Unlike scarlet fever, measles classically presents with **Koplik spots** (small white spots on the buccal mucosa) before the rash appears and does not cause a sandpaper rash or a typical strawberry tongue. *Erythema infectiosum* - Also known as Fifth Disease, it is caused by **Parvovirus B19** and classically presents with a distinctive **

Question 2: A 8-year-old child presents with fever, irritability, and a widespread petechial rash that doesn't blanch with pressure. The child appears unwell and has neck stiffness. What is the most appropriate immediate management?

A. Oral antibiotics
B. IV benzylpenicillin (Correct Answer)
C. Lumbar puncture
D. Blood cultures
E. CT head

Explanation: ***IV benzylpenicillin***- The constellation of fever, irritability, widespread non-blanching petechial rash, unwell appearance, and neck stiffness is highly suggestive of **meningococcal disease** (meningitis with or without septicaemia), a medical emergency.- **Immediate empirical intravenous antibiotics**, such as **benzylpenicillin**, are critical to reduce mortality and morbidity in suspected meningococcal disease and should not be delayed by investigations. *Oral antibiotics*- The child presents with severe symptoms, including an **unwell appearance** and **non-blanching rash**, indicating a life-threatening infection requiring urgent intervention.- **Oral antibiotics** are inadequate for treating severe, rapidly progressing infections like meningococcal disease due to potentially slow absorption and insufficient blood-brain barrier penetration.*Lumbar puncture*- While a **lumbar puncture** is crucial for definitive diagnosis of meningitis, it must **not delay the immediate administration of IV antibiotics** in suspected meningococcal disease.- In a critically unwell child with signs of increased intracranial pressure (e.g., severe irritability, neck stiffness in context of severe illness), a lumbar puncture carries a risk of **herniation** and should be deferred until after antibiotics are given and/or a CT head rules out a space-occupying lesion.*Blood cultures*- **Blood cultures** are important for identifying the causative organism and guiding specific antibiotic therapy, but they should be taken **concurrently with or immediately after administering the first dose of IV antibiotics**.- Delaying antibiotic administration to obtain blood cultures can have severe consequences in a rapidly deteriorating patient with suspected **meningococcal septicaemia**.*CT head*- A **CT head** may be indicated to rule out complications like **cerebral edema** or **abscess** before a lumbar puncture, especially if there are signs of raised intracranial pressure.- However, like other investigations, a **CT head should not delay the immediate administration of life-saving IV antibiotics** in a child with suspected meningococcal disease, where time to treatment directly impacts prognosis.

Question 3: A 8-year-old child presents with fever, sore throat, and a sandpaper-like rash over the trunk and limbs. The tongue appears red with prominent papillae ("strawberry tongue"). What is the most likely diagnosis?

A. Viral exanthem
B. Scarlet fever (Correct Answer)
C. Kawasaki disease
D. Measles
E. Erythema infectiosum

Explanation: ***Scarlet fever*** - The presentation of fever, sore throat (streptococcal pharyngitis), and a generalized fine papular, **sandpaper-like rash** is pathognomonic for scarlet fever. - The finding of a **strawberry tongue** (red, prominent papillae) is also highly characteristic, resulting from the systemic effects of circulating **pyrogenic exotoxins** produced by *Streptococcus pyogenes*. *Viral exanthem* - While many **viral exanthems** cause fever and rash, they typically lack the characteristic fine, **sandpaper texture** or the associated severe pharyngitis. - The combination of sore throat, sandpaper rash, and specific **strawberry tongue** makes a common viral rash diagnosis highly unlikely. *Kawasaki disease* - This disease presents with high fever unresponsive to antipyretics and signs like **bilateral non-exudative conjunctivitis**, cracked lips, and **cervical lymphadenopathy**. - The specific **sandpaper rash** and severe pharyngitis seen in the patient are not typical features of Kawasaki disease, which carries a risk of **coronary artery aneurysms**. *Measles* - Measles is characterized by the prodrome of cough, coryza, and conjunctivitis, followed by a maculopapular rash that starts on the face and spreads downwards. - The presence of **Koplik spots** (small white spots on the buccal mucosa) precedes the rash in measles, and the rash appearance differs from the fine 'sandpaper' texture. *Erythema infectiosum* - This disease (Fifth Disease, caused by **Parvovirus B19**) is clinically recognized by the initial **slapped cheek appearance**. - The rash then spreads to the extremities, developing a distinct **lacy, reticular pattern**, which contrasts sharply with the generalized, fine, sandpaper rash of scarlet fever.

Question 4: A 4-year-old child presents with fever, irritability, and neck stiffness. Lumbar puncture shows: opening pressure 25 cmH₂O, WCC 800/μL (90% neutrophils), protein 2.8 g/L, glucose 1.2 mmol/L (serum glucose 6.0 mmol/L). What is the most likely diagnosis?

A. Viral meningitis
B. Bacterial meningitis (Correct Answer)
C. Tuberculous meningitis
D. Fungal meningitis
E. Normal CSF

Explanation: ***Bacterial meningitis***- The constellation of **fever**, **neck stiffness**, severely elevated CSF **protein** (2.8 g/L), and profoundly low CSF **glucose** (ratio 0.2) is classic for acute bacterial infection.- The marked CSF pleocytosis (800/μL) with a predominant population of **neutrophils** (90%) indicates a rapidly progressive, pyogenic process.*Viral meningitis*- Characterized by **lymphocytic pleocytosis** (predominant lymphocytes) rather than the neutrophilic dominance seen here.- CSF glucose levels are typically **normal** or only mildly reduced, unlike the severe hypoglycemia reported in this patient.*Tuberculous meningitis*- While associated with low CSF glucose and high protein, it generally presents **subacutely** or chronically over weeks, not acutely.- CSF pleocytosis is usually **lymphocytic** or monocytic, not the acute neutrophilic predominance found in this sample.*Fungal meningitis*- This is rare in immunocompetent children, usually follows an indolent or **chronic** course, and typically presents with **lymphocytic** pleocytosis.- The acute presentation with fever, irritability, and prominent neutrophilia points strongly away from a fungal etiology.*Normal CSF*- Normal CSF findings include an opening pressure < 18 cmH₂O, WCC < 5/μL, and a CSF/serum glucose ratio > 0.6.- All measured parameters (pressure 25, WCC 800, glucose ratio 0.2) are significantly **abnormal**, definitively ruling out normal CSF.

Question 5: A 3-year-old child presents with a barking cough, inspiratory stridor, and hoarse voice. The symptoms are worse at night. The child is alert and playful. What is the most likely diagnosis?

A. Epiglottitis
B. Croup (Correct Answer)
C. Bronchiolitis
D. Pneumonia
E. Foreign body aspiration

Explanation: ***Croup*** - The presentation of a **barking cough**, **inspiratory stridor**, and **hoarse voice** in a 3-year-old is the classic triad for **Croup** (laryngotracheobronchitis), typically caused by the **Parainfluenza virus**. - Symptoms are typically worse at night due to increased **vagal tone** and decreased ambient humidity, yet the child remains alert and non-toxic, which is characteristic of mild-to-moderate croup. *Epiglottitis* - This condition presents as a medical emergency with rapid onset of **high fever**, severe **dysphagia**, drooling, and a **muffled voice**, but usually lacks the characteristic **barking cough**. - The child with epiglottitis typically appears **toxic**, apprehensive, and prefers the **tripod position**, unlike the alert and playful child described. *Bronchiolitis* - Bronchiolitis is an infection of the small airways, primarily causing **wheezing**, **tachypnea**, and signs of **lower respiratory distress**, usually without stridor or the specific barking cough. - It predominantly affects infants under 2 years of age and is most often caused by **Respiratory Syncytial Virus (RSV)**. *Pneumonia* - This is an infection of the lung parenchyma, presenting with fever, **tachypnea**, and often a productive cough accompanied by focal findings like **crackles** or **dullness** on chest exam. - Pneumonia does not typically cause prominent **inspiratory stridor** or the characteristic **barking cough** associated with upper airway swelling. *Foreign body aspiration* - This diagnosis usually involves a sudden onset of **choking** or coughing, and if the object is lodged in the larynx or trachea, it causes stridor, but the symptoms do not typically fluctuate and worsen specifically **at night**.

Question 6: A 2-year-old child presents with a 3-day history of cough, wheeze, and difficulty breathing. The symptoms started gradually and the child has been feeding poorly. On examination, there are widespread fine crackles and wheeze. What is the most likely diagnosis?

A. Asthma
B. Pneumonia
C. Bronchiolitis (Correct Answer)
D. Croup
E. Foreign body aspiration

Explanation: ***Bronchiolitis*** - This diagnosis is strongly suggested by the patient's age (2 years), gradual onset of cough, wheeze, and difficulty breathing over 3 days, combined with **poor feeding** and widespread **fine crackles** and **wheeze** on examination, which are classic features of this viral lower respiratory tract infection. - It is the most common cause of lower respiratory tract infection in infants and young children, often caused by **Respiratory Syncytial Virus (RSV)**, leading to inflammation and obstruction of the small airways. *Asthma* - While asthma presents with cough and wheeze, a first presentation in a 2-year-old with a 3-day gradual onset including **poor feeding** and widespread **fine crackles** is less typical, as asthma usually involves recurrent episodes or specific triggers. - The characteristic widespread fine crackles alongside wheeze, especially with a history of poor feeding and a clear acute illness, point away from asthma as the primary diagnosis in this context. *Pneumonia* - Pneumonia usually presents with more localized findings (e.g., **dullness to percussion**, **bronchial breath sounds**), **coarse crackles**, and often higher fever or more significant systemic illness, differentiating it from the generalized wheeze and fine crackles of bronchiolitis. - The description of widespread wheeze is not a typical predominant finding in uncomplicated pneumonia in this age group. *Croup* - Croup is characterized by a distinctive **barking cough** and **inspiratory stridor**, indicating upper airway obstruction, which are absent in the clinical presentation provided. - The widespread wheeze and fine crackles point to lower airway involvement, not the laryngeal and tracheal inflammation seen in croup. *Foreign body aspiration* - Foreign body aspiration typically has a **sudden onset** of choking or coughing, which contrasts with the gradual 3-day history described. - While it can cause wheeze, it is often unilateral or localized and usually lacks the widespread **fine crackles** and history of poor feeding associated with a viral illness.

Question 7: A 9-year-old boy with known asthma presents to the emergency department with an acute exacerbation. Following administration of oxygen, nebulized salbutamol, ipratropium bromide, and oral prednisolone, he remains in respiratory distress with oxygen saturation 92% on high-flow oxygen, peak flow 30% of predicted, and poor respiratory effort. What is the appropriate dose and route of magnesium sulphate administration in this clinical scenario?

A. 40 mg/kg (maximum 2 g) intravenous infusion over 20 minutes (Correct Answer)
B. 25 mg/kg (maximum 1 g) intravenous bolus over 5 minutes
C. 40 mg/kg nebulized with salbutamol
D. 50 mg/kg (maximum 2.5 g) intravenous infusion over 30 minutes
E. 150 mg nebulized with ipratropium bromide

Explanation: ***40 mg/kg (maximum 2 g) intravenous infusion over 20 minutes*** - This patient presents with a **severe acute asthma exacerbation** (peak flow 30% predicted, poor respiratory effort, poor response to initial therapies), necessitating adjunctive intravenous magnesium sulphate. - Current guidelines recommend **intravenous magnesium sulphate** at **40 mg/kg** (maximum 2 g) administered as a slow **infusion over 20 minutes** for children with severe refractory asthma. *25 mg/kg (maximum 1 g) intravenous bolus over 5 minutes* - This **dose (25 mg/kg)** is below the recommended concentration for treating **severe pediatric asthma exacerbations**, which typically calls for 40 mg/kg. - Administering magnesium as a rapid **intravenous bolus over 5 minutes** significantly increases the risk of adverse effects like **hypotension** and cardiac arrhythmias. *40 mg/kg nebulized with salbutamol* - While **nebulized magnesium sulphate** has been studied, its efficacy for **life-threatening asthma exacerbations** is not as well-established as the intravenous route, especially after failure of initial nebulized bronchodilators. - For severe, refractory asthma, **systemic (intravenous) administration** is preferred as it ensures better absorption and clinical effect compared to nebulized delivery. *50 mg/kg (maximum 2.5 g) intravenous infusion over 30 minutes* - This dose of **50 mg/kg** exceeds the standard **maximum recommended dose of 2 g** for intravenous magnesium sulphate in pediatric asthma, raising concerns for increased toxicity without additional therapeutic benefit. - Although a slow infusion, the **recommended duration** is typically 20 minutes for managing acute asthma effectively while minimizing side effects. *150 mg nebulized with ipratropium bromide* - The dose of **150 mg** is an incorrect fixed dose for nebulized magnesium sulphate in children; dosing is typically **weight-based**, and this combination with ipratropium bromide is not standard. - In a **life-threatening asthma exacerbation** with poor respiratory effort, **systemic (intravenous) magnesium sulphate** is the indicated adjunctive treatment, as nebulized delivery is less effective in this critical scenario.

Question 8: A 4-year-old boy presents with sudden onset high fever of 40.2°C, drooling, and severe difficulty swallowing. He is sitting upright, leaning forward with his neck extended, and appears anxious. There is inspiratory stridor and he is reluctant to speak. Oxygen saturation is 96% on air. What is the single most appropriate immediate action?

A. Examine the throat with tongue depressor to visualize the epiglottis
B. Obtain blood cultures and commence intravenous antibiotics immediately
C. Contact senior anaesthetist and ENT surgeon urgently without disturbing the child (Correct Answer)
D. Administer nebulized adrenaline and oral dexamethasone
E. Perform lateral neck X-ray to confirm the diagnosis

Explanation: ***Contact senior anaesthetist and ENT surgeon urgently without disturbing the child*** - The presentation of high fever, **drooling**, and **tripod positioning** is classic for **acute epiglottitis**, a life-threatening medical emergency requiring immediate airway management by specialists. - Keeping the child **undisturbed** is critical, as any agitation or distress can trigger **sudden, complete airway obstruction** and respiratory arrest.*Examine the throat with tongue depressor to visualize the epiglottis* - Instrumental examination of the throat is **strictly contraindicated** outside of a controlled operating theatre environment. - Physical manipulation of the airway can cause **laryngospasm** and immediate, irreversible airway closure.*Obtain blood cultures and commence intravenous antibiotics immediately* - While antibiotics are necessary for the underlying **Haemophilus influenzae type b (Hib)** infection, securing the **airway** takes absolute priority. - Attempting intravenous access (cannulation) is a painful procedure that can **distress the child** and precipitate acute airway collapse.*Administer nebulized adrenaline and oral dexamethasone* - These interventions are the standard of care for **croup (laryngotracheobronchitis)**, which presents with a barking cough and lower fever. - They have **no therapeutic role** in epiglottitis and delaying definitive airway stabilization to provide them is dangerous.*Perform lateral neck X-ray to confirm the diagnosis* - Diagnosis of epiglottitis is primarily **clinical**; transferring a patient to radiology or positioning them for X-rays (the **thumbprint sign**) wastes vital time. - The child must never be left unattended or laid flat for imaging, as this is associated with increased risk of **airway obstruction**.

Question 9: A 2-year-old boy with viral-induced wheeze is assessed in the emergency department. He has received salbutamol via spacer but continues to have expiratory wheeze, recession, and a respiratory rate of 50/min. Oxygen saturation is 93% on air. The parents ask whether their child will develop asthma. Which factor most strongly predicts progression from preschool wheeze to persistent childhood asthma?

A. Male gender
B. Eczema or allergic rhinitis in the child (Correct Answer)
C. Early onset of wheeze in the first year of life
D. Parental smoking in the household
E. History of bronchiolitis requiring hospitalization

Explanation: ***Eczema or allergic rhinitis in the child*** - Personal **atopy** (especially **physician-diagnosed eczema**) is identified as a **major criterion** in the **Asthma Predictive Index (API)** for predicting persistent asthma in school-aged children. - A child with recurrent wheeze and allergic comorbidities has a significantly higher probability of having an **allergic phenotype** that persists, compared to isolated **viral-induced wheeze**. *Male gender* - While **male gender** is a risk factor for **preschool wheezing** and airway narrowing in early life, it is not a strong independent predictor of **persistence** into later childhood. - The gender prevalence often **shifts** around puberty, where asthma becomes more common in females. *Early onset of wheeze in the first year of life* - Early-onset wheezing is often associated with **transient early wheezing**, typically caused by **small airway caliber** rather than an asthmatic pathology. - Most children who wheeze only in the first year of life actually see their symptoms resolve (outgrow it) by age 3 to 6. *Parental smoking in the household* - **Environmental tobacco smoke** is a significant trigger for **exacerbations** and reduced lung function, but it is considered a weaker predictor for the development of chronic asthma than **atopic markers**. - It contributes to **airway hyper-responsiveness** but does not define the underlying allergic predisposition required for an asthma diagnosis. *History of bronchiolitis requiring hospitalization* - A history of severe **RSV** or other viral **bronchiolitis** is associated with subsequent wheezing episodes in early childhood, but it is not a specific predictor of **persistent asthma**. - Many infants hospitalized with bronchiolitis do not go on to develop the **atopic airway inflammation** characteristic of true bronchial asthma.

Question 10: A 15-month-old child is brought to the emergency department with fever of 39.6°C for 2 hours. The mother reports the child had a brief generalized tonic-clonic seizure lasting approximately 3 minutes at home which resolved spontaneously. The child is now alert and playful with no focal neurological signs. There are no signs of meningism. The seizure occurred on the way up in fever. What is the most important next step in management?

A. Perform urgent lumbar puncture to exclude meningitis
B. Administer intravenous antibiotics immediately
C. Commence regular paracetamol and observe for further seizures
D. Arrange urgent CT head to exclude intracranial pathology
E. Undertake thorough clinical examination to identify source of fever (Correct Answer)

Explanation: ***Undertake thorough clinical examination to identify source of fever*** - The child presents with a **simple febrile seizure**: it's generalized, lasted less than 15 minutes, occurred during a fever in a child within the typical age range (6 months to 5 years), and the child has returned to baseline. - After a simple febrile seizure, the most crucial next step is to perform a **thorough clinical examination** to identify the source of the fever and treat the underlying illness, as the child is now stable and neurologically intact. *Perform urgent lumbar puncture to exclude meningitis* - **Lumbar puncture** is not routinely recommended for children over 12 months who are well-appearing, have no **signs of meningism** (e.g., neck stiffness), and no focal neurological signs after a simple febrile seizure. - Given the child is

Question 11: A 5-year-old girl with poorly controlled asthma on beclometasone 400 micrograms twice daily plus montelukast presents with her fourth exacerbation in 6 months. Her mother reports good adherence but mentions they have a cat at home and the child often plays with it. Skin prick testing confirms cat allergy. Despite advice about allergen avoidance, the family is unable to rehome the pet. What is the most appropriate next step in her asthma management?

A. Continue current therapy and arrange follow-up in 3 months
B. Add long-acting beta-agonist to current therapy (Correct Answer)
C. Switch to high-dose inhaled corticosteroid monotherapy
D. Commence allergen-specific immunotherapy for cat allergy
E. Add oral prednisolone maintenance therapy

Explanation: ***Add long-acting beta-agonist to current therapy***- In children whose asthma is poorly controlled on **moderate-dose ICS** and a **Leukotriene Receptor Antagonist (LTRA)**, the next logical step in treatment escalation according to guidelines (e.g., BTS/SIGN, GINA) is to add a **Long-Acting Beta-Agonist (LABA)**.- This patient is experiencing frequent **exacerbations** (four in six months) despite good adherence, indicating a clear need for treatment escalation to achieve better symptom control and prevent future attacks.*Continue current therapy and arrange follow-up in 3 months*- Continuing the same regimen is inappropriate given the clear evidence of **poor asthma control** and recurrent **exacerbations**.- Delaying escalation for 3 months would leave the child at high risk for further severe **asthma attacks**, especially with ongoing **allergen exposure**.*Switch to high-dose inhaled corticosteroid monotherapy*- Increasing to **high-dose ICS** monotherapy is generally less favored in children due to increased risk of **systemic side effects** like growth suppression, compared to combination therapy.- Clinical guidelines prioritize adding a **LABA** as a more effective and safer adjunct to moderate-dose ICS before considering very high doses of **inhaled steroids** alone.*Commence allergen-specific immunotherapy for cat allergy*- While the child has a confirmed **cat allergy**, **allergen-specific immunotherapy** is typically reserved for severe, uncontrolled asthma cases in specialist centers after conventional pharmacological treatments have been optimized.- It is a long-term commitment and not the immediate next step for escalating asthma control in a child who can benefit from standard pharmacological additions.*Add oral prednisolone maintenance therapy*- **Maintenance oral steroids** are reserved for the most severe, refractory cases of asthma (often referred to as Step 5 or 6 in guidelines) due to their significant **long-term systemic toxicity**.- This drastic measure should only be considered after all other treatment options, including combination therapies and specialist referral, have been thoroughly exhausted.

Question 12: According to the NICE traffic light system for assessing febrile illness in children under 5 years, which of the following features would place a child in the high-risk 'red' category requiring urgent specialist assessment?

A. Temperature greater than 39°C in a child aged 6-12 months
B. Non-blanching rash appearing during the consultation (Correct Answer)
C. Capillary refill time of 2 seconds centrally
D. Respiratory rate of 55 breaths per minute in a 6-month-old infant
E. Reduced activity and not responding normally to social cues

Explanation: ***Non-blanching rash appearing during the consultation*** - A **non-blanching rash** is a critical **high-risk (red)** feature in the **NICE traffic light system** as it is a strong indicator of serious invasive bacterial infection, such as **meningococcal disease**. - Its appearance or progression during observation necessitates **urgent specialist assessment** and immediate medical intervention. *Temperature greater than 39°C in a child aged 6-12 months* - A temperature of **39°C or greater** in a child aged **6-12 months** is classified as an **intermediate-risk (amber)** feature, not a high-risk (red) feature. - A high temperature (38°C or above) in infants **under 3 months** is, however, considered a **high-risk (red)** feature. *Capillary refill time of 2 seconds centrally* - A **capillary refill time (CRT)** of **2 seconds** is considered normal and does not indicate a high-risk status. - The NICE traffic light system defines a CRT of **3 seconds or more** as a **high-risk (red)** feature, suggesting poor perfusion. *Respiratory rate of 55 breaths per minute in a 6-month-old infant* - For a 6-month-old infant, a respiratory rate of **55 breaths per minute** is within the normal physiological range, which is typically **25-60 breaths per minute**. - Tachypnoea is considered a **high-risk (red)** feature only if the respiratory rate is **>60 breaths per minute** in any age group, or if there is moderate or severe **chest indrawing** or **grunting**. *Reduced activity and not responding normally to social cues* - **Reduced activity** and **not responding normally to social cues** are classified as **intermediate-risk (amber)** features in the NICE traffic light system. - High-risk (red) neurological features include **decreased conscious level**, **bulging fontanelle** in infants, or **neck stiffness**.

Question 13: A 3-year-old boy with recurrent viral-induced wheeze attends the emergency department with increased work of breathing, expiratory wheeze, and respiratory rate of 45/min. Oxygen saturation is 94% on air. He has had similar episodes in the past which responded to bronchodilators. What is the key clinical feature that distinguishes viral-induced wheeze from multi-trigger wheeze in preschool children?

A. Presence of interval symptoms between acute episodes (Correct Answer)
B. Age of onset before 3 years
C. Response to inhaled bronchodilators during acute episodes
D. Family history of atopy
E. Evidence of atopic sensitization on allergy testing

Explanation: ***Presence of interval symptoms between acute episodes***- In **episodic viral wheeze**, symptoms only occur during viral infections and the child is **asymptomatic between episodes**.- In **multi-trigger wheeze**, the child experiences symptoms during viral infections as well as **interval symptoms** triggered by exercise, cold air, or allergens.*Age of onset before 3 years*- Both **episodic viral-induced wheeze** and **multi-trigger wheeze** typically present in children under the age of 3 years.- Because they share this timing, **age of onset** cannot be used to clinically distinguish between the two phenotypes.*Response to inhaled bronchodilators during acute episodes*- Both conditions involve **bronchoconstriction** that usually responds well to **Beta-2 agonists** like salbutamol during an acute flare.- A positive response confirms the presence of **reversible airway obstruction** but does not clarify the underlying trigger pattern.*Family history of atopy*- While a family history of **asthma or atopy** may be more frequent in multi-trigger wheeze, it is not the diagnostic discriminator.- Children with either phenotype may have a **genetic predisposition** to atopic diseases without it defining the trigger pattern.*Evidence of atopic sensitization on allergy testing*- **Atopic sensitization** (positive skin prick or IgE) is more common in multi-trigger wheeze but is not a definitive clinical feature for classification.- The distinction is primarily based on the **clinical history** of symptoms between viral episodes rather than laboratory or allergy results.

Question 14: An 8-year-old girl with asthma is brought to the emergency department with severe breathlessness. She is sitting upright, unable to complete sentences, with respiratory rate 38/min, heart rate 140/min, and oxygen saturation 91% on air. She has widespread wheeze with reduced air entry bilaterally. Peak expiratory flow is 35% of predicted. She has received three doses of back-to-back salbutamol nebulisers with oxygen and ipratropium bromide. What defines this as life-threatening asthma requiring escalation of care?

A. Peak expiratory flow less than 50% of predicted value
B. Oxygen saturation less than 92% on air (Correct Answer)
C. Inability to complete sentences in one breath
D. Respiratory rate greater than 30 breaths per minute
E. Heart rate greater than 130 beats per minute

Explanation: ***Oxygen saturation less than 92% on air***- In children, an **SpO2 <92%** on air is a critical marker of **life-threatening asthma**, indicating severe hypoxemia and the need for immediate, aggressive intervention.- This level of desaturation reflects significant ventilation-perfusion mismatch, requiring rapid escalation of care beyond standard bronchodilators, potentially including **IV magnesium sulfate**, aminophylline, or consideration for **intensive care unit (ICU)** admission.*Peak expiratory flow less than 50% of predicted value*- A **PEF <50%** of predicted (or best) is a criterion for **acute severe asthma**, not life-threatening asthma.- For a diagnosis of **life-threatening asthma** specifically based on peak flow, the value must be **less than 33%** of the predicted or best value.*Inability to complete sentences in one breath*- Being **unable to complete sentences** is a significant sign of **acute severe asthma** in children over 5 years old, indicating severe respiratory distress.- While serious, it does not by itself meet the **life-threatening** threshold unless accompanied by other specific criteria like **silent chest**, cyanosis, or exhaustion.*Respiratory rate greater than 30 breaths per minute*- A **respiratory rate >30/min** in a child over 5 years old is a diagnostic criterion for **acute severe asthma**.- In **life-threatening asthma**, the respiratory rate may initially be very high but can paradoxically decrease due to **respiratory muscle fatigue** and impending respiratory arrest, which is an ominous sign.*Heart rate greater than 130 beats per minute*- A **heart rate >125-130/min** (depending on age) is a marker for **acute severe asthma** in children, reflecting physiological stress.- High heart rates are often present in severe asthma, but **life-threatening** status is primarily defined by objective measures of hypoxia, **altered consciousness**, hypotension, or more severe physiological decompensation rather than heart rate alone.

Question 15: A 19-month-old child presents with a 6-day history of persistent high fever ranging from 39.5°C to 40.4°C despite regular paracetamol. The child is irritable and has bilateral non-purulent conjunctivitis, cracked red lips, a polymorphous rash on the trunk, and cervical lymphadenopathy. Blood tests show: Hb 100 g/L, WCC 16.5 × 10⁹/L, platelets 485 × 10⁹/L, CRP 125 mg/L, ALT 65 U/L. What is the most likely diagnosis?

A. Kawasaki disease (Correct Answer)
B. Epstein-Barr virus infection
C. Scarlet fever
D. Measles
E. Staphylococcal toxic shock syndrome

Explanation: ***Kawasaki disease*** - This child meets the criteria of **persistent fever for ≥5 days** along with four clinical signs: **non-purulent conjunctivitis**, **cracked red lips**, **polymorphous rash**, and **cervical lymphadenopathy**. - Laboratory findings of **thrombocytosis** (high platelets), **elevated CRP**, and **mild transaminitis** (elevated ALT) further support this systemic vasculitis diagnosis. *Epstein-Barr virus infection* - Typically presents with **exudative pharyngitis**, significant **splenomegaly**, and **generalized lymphadenopathy** rather than localized cervical nodes. - While it causes fever and rash (especially after amoxicillin), it lacks the specific **mucocutaneous manifestations** like cracked lips and non-purulent conjunctivitis. *Scarlet fever* - Characterized by a **sandpaper-like rash** and a **strawberry tongue**, but it does not typically present with **conjunctivitis**. - It is caused by **Group A Streptococcus** and usually lacks the extreme irritability and multi-system laboratory abnormalities seen in Kawasaki disease. *Measles* - Presents with the classic triad of **cough, coryza, and conjunctivitis**, accompanied by pathognomonic **Koplik spots** on the buccal mucosa. - The **maculopapular rash** in measles typically begins at the hairline and spreads cephalocaudally, which differs from the trunk-centered polymorphous rash described. *Staphylococcal toxic shock syndrome* - Characterized by **rapid clinical deterioration**, severe **hypotension (shock)**, and multi-organ failure, which are not present in this stable, albeit irritable, child. - While it features a rash and fever, the laboratory profile would usually show more severe **renal or hepatic impairment** and evidence of localized **Staphylococcal infection**.

Question 16: A 6-year-old boy with asthma on beclometasone 400 micrograms twice daily continues to experience wheeze and cough requiring salbutamol 3-4 times per week. He has nocturnal symptoms once per week and has missed school twice in the past month due to asthma symptoms. Inhaler technique has been checked and is appropriate. What is the most appropriate next step in management according to BTS/SIGN guidelines?

A. Increase beclometasone to 800 micrograms twice daily
B. Add oral montelukast and continue current inhaled corticosteroid dose
C. Add long-acting beta-agonist (salmeterol) and continue current inhaled corticosteroid dose (Correct Answer)
D. Switch to combination inhaler containing fluticasone and salmeterol
E. Add oral theophylline and continue current inhaled corticosteroid dose

Explanation: ***Add long-acting beta-agonist (salmeterol) and continue current inhaled corticosteroid dose*** - According to **BTS/SIGN guidelines** for children aged 5–16, the most appropriate next step for patients poorly controlled on medium-dose **Inhaled Corticosteroids (ICS)** is the addition of a **Long-Acting Beta-Agonist (LABA)**. - This child is currently at Step 3 (Moderate dose ICS), and adding a LABA represents the transition to **Step 4** of the pediatric management pathway to achieve better symptom control by providing prolonged bronchodilation. *Increase beclometasone to 800 micrograms twice daily* - Increasing the dose of **ICS** beyond moderate levels is generally less effective than adding a **LABA** for improving symptom control and carries a higher risk of systemic **adverse effects** in children, such as growth suppression. - **BTS/SIGN** guidelines typically recommend adding a LABA or Leukotriene Receptor Antagonist (LTRA) before a significant escalation to high-dose ICS for children in this age group. *Add oral montelukast and continue current inhaled corticosteroid dose* - While **Montelukast (LTRA)** is an alternative add-on therapy at Step 4, **LABA** is generally considered the preferred first-choice add-on for children aged 5-16 years who remain symptomatic on ICS. - LTRA addition is often considered if the patient has persistent symptoms despite LABA, cannot tolerate LABA, or is in a younger age group (under 5) where LABA might be less preferred. *Switch to combination inhaler containing fluticasone and salmeterol* - While using a **combination inhaler** is a practical method to deliver ICS and LABA, the fundamental clinical step described by guidelines is the **addition of a LABA** to the existing ICS. - The primary action is adding the new drug class (LABA), not just switching the delivery device. The current ICS dose is already medium, and a direct switch might imply an unnecessary change in the specific ICS. *Add oral theophylline and continue current inhaled corticosteroid dose* - **Theophylline** is considered a later-line treatment option (typically Step 5 or higher) for asthma control due to its narrow **therapeutic index** and the potential for significant side effects. - It requires **regular blood monitoring** to ensure therapeutic levels and avoid toxicity, making it a less suitable and less preferred option compared to LABA in Step 4 management.

Question 17: A 4-year-old girl presents to the emergency department with fever of 39.8°C for 8 hours and a widespread petechial rash that does not blanch on pressure. She appears lethargic and has cool peripheries. Heart rate is 155/min, blood pressure 85/50 mmHg, respiratory rate 35/min, and capillary refill time is 4 seconds. What is the single most important immediate intervention?

A. Obtain blood cultures before administering any antibiotics
B. Administer intravenous ceftriaxone immediately
C. Perform lumbar puncture to confirm meningococcal disease
D. Administer intramuscular benzylpenicillin immediately
E. Commence rapid fluid resuscitation with 20 ml/kg normal saline bolus (Correct Answer)

Explanation: ***Commence rapid fluid resuscitation with 20 ml/kg normal saline bolus*** - The patient exhibits clear signs of **septic shock** (tachycardia, hypotension, prolonged capillary refill, and cool peripheries); in the **ABCDE approach**, Circulation management via volume restoration is the top priority. - Restoring **intravascular volume** is vital to maintain organ perfusion and prevent multi-organ failure in a child with clinical **meningococcal septicaemia**. *Obtain blood cultures before administering any antibiotics* - While cultures are important, they should never delay life-saving treatment in a child with **hemodynamic instability** or suspected **sepsis**. - Managing the **airway, breathing, and circulation** (shock) must always precede secondary clinical investigations. *Administer intravenous ceftriaxone immediately* - Antibiotics are essential and should be given as soon as possible, but in a patient with **uncompensated shock**, hemodynamic stabilization with **fluid boluses** is the immediate priority. - Once circulation is supported, broad-spectrum **cephalosporins** should be administered to target Neisseria meningitidis. *Perform lumbar puncture to confirm meningococcal disease* - A lumbar puncture is strictly **contraindicated** in a patient with **haemodynamic instability**, shock, or signs of raised intracranial pressure (e.g., lethargy). - The diagnosis of meningococcal disease is clinical in this setting, and management should focus on **resuscitation** rather than waiting for CSF results. *Administer intramuscular benzylpenicillin immediately* - **Intramuscular benzylpenicillin** is primarily indicated in the **pre-hospital setting** when there is a delay in reaching the hospital. - In an emergency department, **intravenous access** is mandatory to provide both fluid resuscitation and preferred IV antibiotics like **ceftriaxone**.

Question 18: A 10-month-old infant presents with a 3-day history of coryzal symptoms followed by progressive respiratory distress. On examination, temperature is 37.8°C, respiratory rate 65/min, oxygen saturation 90% on air, and there are bilateral fine inspiratory crackles with subcostal recession. The infant is feeding at 50% of normal intake. What is the most appropriate management?

A. Admit for supplementary oxygen therapy and monitoring of feeding (Correct Answer)
B. Prescribe oral prednisolone and discharge with safety-netting advice
C. Commence nebulised salbutamol and reassess in one hour
D. Arrange chest radiograph and commence intravenous antibiotics
E. Discharge with advice on nasal saline drops and adequate hydration

Explanation: ***Admit for supplementary oxygen therapy and monitoring of feeding***- The infant presents with classic **bronchiolitis**, and an **oxygen saturation of 90%** on air (below the 92% threshold) is a definitive indication for **hospital admission** and oxygen therapy.- A **reduced oral intake** (50% of normal) further necessitates admission for **hydration monitoring** and potential nasogastric or intravenous fluid support.*Prescribe oral prednisolone and discharge with safety-netting advice*- **Corticosteroids** like prednisolone are not recommended in the management of bronchiolitis as they do not reduce the rate of admission or improve outcomes.- The infant is clinically unstable due to **hypoxia** and poor feeding, making discharge unsafe at this time.*Commence nebulised salbutamol and reassess in one hour*- **Bronchodilators** such as salbutamol are ineffective in bronchiolitis because the underlying pathology is related to **airway edema** and mucus, not smooth muscle bronchoconstriction.- NICE guidelines explicitly advise against the routine use of **nebulised bronchodilators** for infants with a clear clinical diagnosis of bronchiolitis.*Arrange chest radiograph and commence intravenous antibiotics*- **Chest X-rays** are not routinely indicated for bronchiolitis and are often misleading, showing non-specific signs like **hyperinflation** or focal atelectasis.- **Antibiotics** should not be used in bronchiolitis as it is a **viral infection** (typically RSV), unless there is strong clinical evidence of secondary bacterial pneumonia.*Discharge with advice on nasal saline drops and adequate hydration*- While nasal saline can help with congestion, this infant's **respiratory rate of 65/min** and **hypoxia** indicate severe distress that cannot be managed at home.- Discharge is only appropriate for mild cases where the infant is **maintaining saturations** and feeding adequately; these criteria are not met here.

Question 19: A 7-year-old boy with known asthma presents to the emergency department with an acute exacerbation. He has received three doses of salbutamol via a spacer and has shown some improvement. His respiratory rate is 28/min, oxygen saturation 94% on air, and he can speak in sentences. Peak expiratory flow is 65% of predicted. What is the most appropriate next step in management?

A. Discharge home with advice to continue regular salbutamol via spacer
B. Administer oral prednisolone and continue salbutamol nebulisers every 4 hours
C. Admit for observation with oxygen therapy and intravenous hydrocortisone
D. Discharge with oral prednisolone and asthma action plan for follow-up (Correct Answer)
E. Administer intravenous magnesium sulphate and consider ICU referral

Explanation: ***Discharge with oral prednisolone and asthma action plan for follow-up*** - The patient presents with a **moderate asthma exacerbation** (PEF 65% of predicted, SpO2 94%, speaking in sentences) and has shown improvement after initial salbutamol, making **discharge** an appropriate next step. - For moderate exacerbations, a short course of **oral corticosteroids** (e.g., prednisolone for 3-5 days) is essential, along with a personalized **asthma action plan** and arrangement for follow-up to prevent relapse. *Discharge home with advice to continue regular salbutamol via spacer* - Discharging a patient with a moderate asthma exacerbation solely on **salbutamol** without systemic corticosteroids is inappropriate, as steroids are crucial to reduce **airway inflammation** and prevent recurrence. - Omitting the **oral prednisolone course** deviates from standard management guidelines for a moderate asthma exacerbation. *Administer oral prednisolone and continue salbutamol nebulisers every 4 hours* - For moderate exacerbations, **nebulisers** are not superior to a metered-dose inhaler (MDI) with a **spacer** and are typically reserved for severe cases or those unable to use an MDI effectively. - Continuing 4-hourly treatments in a hospital setting is generally unnecessary for a child who has stabilized and can be managed effectively at home with oral steroids and as-needed bronchodilators. *Admit for observation with oxygen therapy and intravenous hydrocortisone* - Admission is not indicated as the child's **oxygen saturation** (94%) is acceptable for discharge, and clinical stability does not meet criteria for **inpatient care** for a moderate exacerbation. - **Intravenous hydrocortisone** is reserved for severe or life-threatening asthma, or when oral corticosteroids cannot be tolerated, which is not the case here. *Administer intravenous magnesium sulphate and consider ICU referral* - **Intravenous magnesium sulphate** is a second-line therapy for severe or **life-threatening asthma** that is refractory to initial treatment, which does not align with this child's moderate and improving condition. - **ICU referral** is indicated for signs of impending respiratory failure (e.g., exhaustion, rising pCO2), which are absent in this stable patient.

Question 20: Understanding the pathophysiology of viral-induced wheeze in young children, which of the following statements best explains why this condition is more common in infants and toddlers compared to older children and tends to improve with age?

A. Viral infections cause permanent airway remodelling that resolves as the immune system matures
B. Infants have proportionally smaller airway diameter and increased airway resistance, making them more susceptible to obstruction from inflammation and mucus (Correct Answer)
C. Young children have deficient immunoglobulin production that normalizes by school age
D. The diaphragm is not fully developed until age 5 years, limiting respiratory reserve during viral infections
E. Viral-induced wheeze is caused by IgE-mediated hypersensitivity that resolves with allergen tolerance development

Explanation: ***Infants have proportionally smaller airway diameter and increased airway resistance, making them more susceptible to obstruction from inflammation and mucus*** - According to **Poiseuille's law**, airway resistance is inversely proportional to the fourth power of the radius, meaning even small amounts of **inflammation or mucus** significantly increase resistance in tiny airways. - As children grow, the **absolute diameter** of the airways increases (growth of the airway caliber), which naturally reduces the clinical impact of viral-induced swelling and causes the condition to improve with age. *Viral infections cause permanent airway remodelling that resolves as the immune system matures* - **Airway remodeling** refers to structural changes (like basement membrane thickening) often seen in chronic asthma, but these changes are generally considered **irreversible** rather than self-resolving. - Viral-induced wheeze is primarily an **acute inflammatory** response to a trigger, not a permanent structural defect that disappears with maturity. *Young children have deficient immunoglobulin production that normalizes by school age* - While infants have a period of **physiological nadir** in IgG, viral wheezing is a mechanical issue of **airway physics** rather than a primary immunodeficiency disorder. - Most children with episodic viral wheeze have **normal immunoglobulin levels** for their age and do not suffer from recurrent systemic bacterial infections. *The diaphragm is not fully developed until age 5 years, limiting respiratory reserve during viral infections* - While infants have a more **horizontal rib cage** and a more compliant chest wall, the **diaphragm** is fully formed and functional at birth. - Respiratory distress in these children is driven by the **increased work of breathing** required to overcome high airway resistance, not a lack of diaphragmatic development. *Viral-induced wheeze is caused by IgE-mediated hypersensitivity that resolves with allergen tolerance development* - **Episodic viral wheeze** is triggered by respiratory viruses (like Rhinovirus) and is typically **non-atopic**, meaning it does not involve the IgE-mediated pathways seen in allergic asthma. - The resolution of symptoms with age is due to **increased airway size**, not the development of immunological tolerance to allergens.

Question 21: A 9-year-old boy with asthma is brought to the emergency department in severe respiratory distress. On arrival, he has a respiratory rate of 8/min, heart rate 150/min, oxygen saturation 85% on high-flow oxygen. He appears exhausted with minimal chest wall movement, and his chest is silent on auscultation with no wheeze audible. He has altered level of consciousness and is difficult to rouse. What is the most appropriate immediate management?

A. Administer nebulised salbutamol and ipratropium bromide and reassess in 15 minutes
B. Commence intravenous magnesium sulphate infusion urgently
C. Call for senior anaesthetic support and prepare for emergency intubation and ventilation (Correct Answer)
D. Give subcutaneous adrenaline 1:1000 and commence aminophylline infusion
E. Administer intravenous salbutamol infusion and high-dose methylprednisolone

Explanation: ***Call for senior anaesthetic support and prepare for emergency intubation and ventilation*** - This patient exhibits signs of **near-fatal asthma**, including severe **bradypnea (RR 8/min)**, **silent chest** (no wheeze audible), **exhaustion**, and **altered level of consciousness**, indicating impending respiratory arrest. - **Emergency intubation and mechanical ventilation** are crucial immediate interventions when a child with asthma is in respiratory failure and can no longer maintain adequate breathing or oxygenation. *Administer nebulised salbutamol and ipratropium bromide and reassess in 15 minutes* - The presence of a **silent chest** with minimal air movement suggests that nebulized medications would be ineffective as they cannot reach the lower airways. - Reassessing in 15 minutes is too long for a patient with **imminent respiratory arrest** and declining neurological status, who requires immediate life-saving interventions. *Commence intravenous magnesium sulphate infusion urgently* - **Intravenous magnesium sulphate** is an important adjunctive treatment for severe asthma, but it does not address the immediate need for **airway protection** and **ventilatory support** in a patient with respiratory collapse. - The patient's **exhaustion**, **bradypnea**, and **altered consciousness** indicate that bronchodilators alone are insufficient and direct ventilatory assistance is required. *Give subcutaneous adrenaline 1:1000 and commence aminophylline infusion* - **Subcutaneous adrenaline** is not the primary intervention for acute severe asthma with impending respiratory arrest; it's more commonly used in anaphylaxis or if other routes are unavailable. - **Aminophylline infusions** are a third-line therapy with a narrow therapeutic index and are too slow to act in an acute emergency requiring immediate **respiratory support**. *Administer intravenous salbutamol infusion and high-dose methylprednisolone* - While **intravenous salbutamol** and **high-dose corticosteroids** are essential components of severe asthma management, their effects are not immediate enough to prevent **respiratory arrest**. - The immediate priority in a patient with **hypoxia**, **hypoventilation**, and **altered consciousness** is to secure the airway and provide ventilatory support, adhering to the **ABC (Airway, Breathing, Circulation)** principles.

Question 22: A 13-month-old child presents to the emergency department with fever of 39.7°C for 7 hours. The child appears unwell with reduced activity and is refusing to drink. On examination, temperature is 39.5°C, heart rate 165/min, respiratory rate 45/min, capillary refill time 3 seconds centrally, and blood pressure 85/50 mmHg. The child is irritable but rousable. There is a non-blanching purpuric rash with three lesions (2-3mm) on the lower limbs. What is the single most important immediate management step?

A. Obtain blood cultures and perform lumbar puncture before starting antibiotics
B. Administer intravenous ceftriaxone immediately after obtaining blood cultures only
C. Give intramuscular benzylpenicillin immediately without delay for any investigations (Correct Answer)
D. Commence fluid resuscitation with 20ml/kg 0.9% sodium chloride bolus over 10 minutes
E. Administer intravenous dexamethasone followed by antibiotics

Explanation: ***Give intramuscular benzylpenicillin immediately without delay for any investigations*** - This child presents with signs highly suggestive of **meningococcal sepsis**, including fever, irritability, signs of shock, and crucially, a **non-blanching purpuric rash**. - **Immediate administration of parenteral antibiotics** (like IM benzylpenicillin) is the most critical intervention to reduce mortality and morbidity in suspected meningococcal disease; any delay for investigations is unacceptable. *Obtain blood cultures and perform lumbar puncture before starting antibiotics* - Delaying antibiotic administration for **blood cultures** and a **lumbar puncture** in a child with suspected severe sepsis and a purpuric rash can be fatal. - A **lumbar puncture** is often **contraindicated** in unstable patients or those with signs of shock (as seen with prolonged CRT and tachycardia) due to the risk of neurological deterioration. *Administer intravenous ceftriaxone immediately after obtaining blood cultures only* - While **ceftriaxone** is an appropriate antibiotic for meningococcal disease, prioritizing blood cultures to the point of delaying antibiotic administration is incorrect in this critical scenario. - If **IV access** is not instantly achievable, an **intramuscular antibiotic** (like benzylpenicillin) should be given without hesitation to ensure prompt drug delivery. *Commence fluid resuscitation with 20ml/kg 0.9% sodium chloride bolus over 10 minutes* - This child shows signs of **compensated shock**, making fluid resuscitation important for hemodynamic support. - However, for suspected **meningococcal sepsis**, stopping the underlying infection with antibiotics takes precedence as the single most immediate life-saving intervention, with fluids following or given concurrently. *Administer intravenous dexamethasone followed by antibiotics* - **Dexamethasone** is an **adjunctive therapy** for certain types of bacterial meningitis to reduce inflammation and neurological complications, not the primary immediate treatment for sepsis with purpura. - The priority is prompt **eradication of the infection** with antibiotics; steroids are a secondary consideration and should not delay antibiotic administration.

Question 23: A 6-year-old boy with asthma is being reviewed following an acute exacerbation requiring hospital admission. He is currently on beclometasone 200 micrograms twice daily and montelukast 5mg once daily, with salbutamol as needed. His mother reports he has needed his blue inhaler 5-6 times per week over the past month and wakes at night with cough about twice a week. He missed 3 days of school last month due to asthma symptoms. What is the most appropriate next step in his asthma management according to current guidelines?

A. Increase beclometasone to 400 micrograms twice daily
B. Add salmeterol (long-acting beta-2 agonist) to current regimen
C. Stop montelukast and start salmeterol instead
D. Continue current treatment but review inhaler technique and adherence (Correct Answer)
E. Add theophylline to current treatment

Explanation: ***Continue current treatment but review inhaler technique and adherence***- Before escalating therapy for poor asthma control, guidelines emphasize the necessity of checking **inhaler technique**, **medication adherence**, and **trigger avoidance**.- Since poor technique and non-adherence are major contributors to treatment failure in children, addressing these issues is the **highest priority** next step before pharmacological escalation.*Increase beclometasone to 400 micrograms twice daily*- Increasing to a **moderate-dose ICS** is a later step in management and should not be done without first verifying that the current low-dose ICS is being administered correctly.- High doses of corticosteroids in children increase the risk of **systemic side effects** like growth suppression, making it crucial to ensure they are actually needed.*Add salmeterol (long-acting beta-2 agonist) to current regimen*- Adding a **Long-Acting Beta-2 Agonist (LABA)** is a consideration for Step 4 of pediatric guidelines, but it must be preceded by an assessment of **basics** like adherence and technique.- Adding more medication to a regimen where the current medication may not be inhaled properly is clinically **ineffective and costly**.*Stop montelukast and start salmeterol instead*- While some guidelines suggest swapping a **Leukotriene Receptor Antagonist (LTRA)** for a LABA if there is no response, this child is already experiencing severe enough symptoms to warrant clinical review first.- Switching medication classes does not solve the underlying issue if the child's **inhaler technique** is the reason for the frequent nights with cough.*Add theophylline to current treatment*- **Theophylline** is typically reserved as a much later-stage add-on therapy due to its **narrow therapeutic index** and the requirement for serum monitoring.- It is not indicated at this stage of management, especially when simpler interventions like **technique optimization** have not yet been performed.

Question 24: An 8-month-old infant born at 26 weeks gestation with chronic lung disease of prematurity presents with a 3-day history of increased work of breathing, poor feeding, and low-grade fever. On examination, respiratory rate is 68/min, oxygen saturation 88% on air, with widespread fine inspiratory crackles and expiratory wheeze. The infant has subcostal and intercostal recession. A diagnosis of bronchiolitis is suspected. Which pathogen is this infant at particular risk of severe disease from, and what preventive measure should have been considered?

A. Respiratory syncytial virus (RSV); prophylactic palivizumab during RSV season (Correct Answer)
B. Influenza A virus; annual influenza vaccination from 6 months
C. Human metapneumovirus; prophylactic immunoglobulin therapy
D. Parainfluenza virus; palivizumab prophylaxis during winter months
E. Respiratory syncytial virus; monthly RSV vaccination during first year of life

Explanation: ***Respiratory syncytial virus (RSV); prophylactic palivizumab during RSV season*** - **Respiratory syncytial virus (RSV)** is the most common cause of **bronchiolitis**, accounting for 70-80% of cases, and leads to severe disease in infants with **bronchopulmonary dysplasia (BPD)**. - **Palivizumab**, a humanized **monoclonal antibody**, is indicated for high-risk infants such as those born before 29 weeks gestation or those with **chronic lung disease of prematurity** to reduce hospitalization. *Influenza A virus; annual influenza vaccination from 6 months* - While **Influenza A** can cause respiratory illness, it typically presents with higher fever and systemic symptoms rather than the classic clinical picture of **bronchiolitis**. - Although vaccination is recommended from age 6 months, it does not provide protection against **RSV**, which is the primary pathogen associated with this clinical presentation. *Human metapneumovirus; prophylactic immunoglobulin therapy* - **Human metapneumovirus (hMPV)** is a known cause of bronchiolitis, but it is less prevalent than **RSV** and lacks a specific approved prophylactic antibody. - Standard **immunoglobulin therapy** is not used for the prevention of bronchiolitis in premature infants; specific **monoclonal antibodies** are required. *Parainfluenza virus; palivizumab prophylaxis during winter months* - **Parainfluenza virus** is primarily associated with **croup** (laryngotracheobronchitis) rather than the fine crackles and wheezing characteristic of bronchiolitis. - **Palivizumab** is a targeted therapy specifically designed against the **RSV fusion protein** and has no clinical efficacy against parainfluenza viruses. *Respiratory syncytial virus; monthly RSV vaccination during first year of life* - While RSV is the correct pathogen, **Palivizumab** provides **passive immunity** via monoclonal antibodies rather than active immunity through a vaccine. - There is currently no routine **monthly vaccination** schedule for infants; prophylaxis is achieved through monthly **antibody injections** during the peak viral season.

Question 25: A 7-year-old girl with asthma presents to the emergency department with wheeze and breathlessness. She is on beclometasone 400 micrograms twice daily and uses salbutamol as needed. On examination, she has a respiratory rate of 28/min, heart rate 110/min, oxygen saturation 96% on air, and is able to complete full sentences. There is polyphonic expiratory wheeze throughout both lung fields. Peak expiratory flow is 65% of her predicted value. How should this exacerbation be classified and managed?

A. Acute severe asthma - give high-flow oxygen, nebulised salbutamol, ipratropium bromide, and oral prednisolone
B. Moderate acute asthma - give salbutamol via spacer (10 puffs) and oral prednisolone, observe for 1 hour (Correct Answer)
C. Life-threatening asthma - give high-flow oxygen, continuous nebulised salbutamol, ipratropium, IV magnesium sulphate, and call ICU
D. Moderate acute asthma - give salbutamol via spacer (10 puffs), observe for 1 hour, discharge if improved
E. Acute severe asthma - give high-flow oxygen, nebulised salbutamol, oral prednisolone, and prepare for possible escalation

Explanation: ***Moderate acute asthma - give salbutamol via spacer (10 puffs) and oral prednisolone, observe for 1 hour*** - This patient is classified as having **moderate acute asthma** because she is able to **complete full sentences**, has **oxygen saturations ≥92%** (96%), and a **PEFR >50%** (65%). - Management for moderate exacerbations in children involves using a **pressurized metered-dose inhaler (pMDI) with a spacer** for bronchodilation and a course of **oral prednisolone** to reduce airway inflammation. *Acute severe asthma - give high-flow oxygen, nebulised salbutamol, ipratropium bromide, and oral prednisolone* - This classification is incorrect as **severe asthma** typically presents with a **PEFR 33-50%**, inability to complete sentences, or a heart rate >125/min (for children over 5). - **Nebulized therapy** and **ipratropium bromide** are escalated treatments reserved for patients who meet severe criteria or fail to respond to initial treatment. *Life-threatening asthma - give high-flow oxygen, continuous nebulised salbutamol, ipratropium, IV magnesium sulphate, and call ICU* - **Life-threatening** features such as **SpO2 <92%**, **silent chest**, cyanosis, exhaustion, or **PEFR <33%** are absent in this case. - Intervention with **IV magnesium sulphate** and ICU consultation is only indicated for patients with deteriorating clinical status or persistent severe symptoms. *Moderate acute asthma - give salbutamol via spacer (10 puffs), observe for 1 hour, discharge if improved* - While the classification of moderate acute asthma is correct, this option is incomplete as it lacks the essential administration of **oral prednisolone**. - **Oral corticosteroids** are mandatory in the management of acute moderate asthma to prevent **late-phase relapse** and improve recovery rates. *Acute severe asthma - give high-flow oxygen, nebulised salbutamol, oral prednisolone, and prepare for possible escalation* - This patient does not meet the **severe asthma** thresholds, specifically maintaining a **heart rate <125/min** and **respiratory rate <30/min** (for a 7-year-old). - High-flow **oxygen** is unnecessary in this scenario as the patient's saturations are stable at **96% on air**.

Question 26: A 15-month-old child is brought to the GP with a 36-hour history of fever to 39.3°C and coryzal symptoms. The parents report the child had a brief episode this morning where they became stiff, their eyes rolled back, and their limbs jerked rhythmically for approximately 2 minutes. The child was drowsy afterwards for 10 minutes but has since returned to their usual self. Examination reveals a febrile child with temperature 38.6°C, clear chest, and normal neurological examination. What is the most appropriate management?

A. Arrange urgent hospital admission for investigation including lumbar puncture
B. Prescribe rectal diazepam to be used if further seizure lasts more than 5 minutes and provide safety-netting advice (Correct Answer)
C. Arrange urgent CT brain scan
D. Prescribe prophylactic daily anticonvulsant medication
E. Refer to paediatric neurology for EEG

Explanation: ***Prescribe rectal diazepam to be used if further seizure lasts more than 5 minutes and provide safety-netting advice*** - This child presented with a **simple febrile seizure** (generalized, <15 minutes, single episode in 24 hours), which is common and benign in children aged **6 months to 5 years**. - Standard management involves **reassurance**, education on fever management, and providing **rescue medication** like rectal diazepam or buccal midazolam for prolonged future episodes. *Arrange urgent hospital admission for investigation including lumbar puncture* - Admission and **lumbar puncture** are not indicated for a simple febrile seizure in a child who has fully recovered and shows no signs of **meningism** or sepsis. - This child has a clear viral source (**coryzal symptoms**) and a **normal neurological examination**, making intracranial infection highly unlikely. *Arrange urgent CT brain scan* - **Neuroimaging** is not routinely recommended for simple febrile seizures as they do not indicate underlying **structural brain abnormalities**. - A scan would only be considered if there were persistent focal neurological deficits or signs of **raised intracranial pressure**. *Prescribe prophylactic daily anticonvulsant medication* - **Prophylactic anticonvulsants** are not indicated for simple febrile seizures because they have significant side effects and do not prevent future epilepsy. - The risks of daily medication outweigh the benefits for a **benign, self-limiting condition** with an excellent long-term prognosis. *Refer to paediatric neurology for EEG* - An **EEG** is not useful in the routine workup of simple febrile seizures as it does not predict the recurrence of seizures or the risk of **epilepsy**. - Referral is usually reserved for **complex febrile seizures** (focal, >15 minutes, or multiple episodes) or if there is developmental regression.

Question 27: A 3-year-old boy presents with a 4-day history of fever ranging from 38.7°C to 40.1°C. He has bilateral non-purulent conjunctivitis, erythematous cracked lips, a polymorphous rash on his trunk, and mild cervical lymphadenopathy. His hands and feet appear oedematous and erythematous. Blood tests reveal WCC 17.5 × 10⁹/L with neutrophilia, CRP 145 mg/L, ESR 88 mm/hr, albumin 28 g/L, and platelet count 580 × 10⁹/L. What is the most important immediate investigation to perform?

A. Throat swab for bacterial culture
B. Blood culture and viral PCR panel
C. Chest X-ray and ECG
D. Echocardiography (Correct Answer)
E. Lumbar puncture

Explanation: ***Echocardiography***- The patient presents with clinical features of **Kawasaki disease**, including high fever, **conjunctivitis**, **cracked lips**, **extremity oedema**, and **polymorphous rash**; echocardiography is vital to screen for **coronary artery aneurysms**.- It serves as the baseline assessment for cardiac function and helps identify early **myocarditis** or pericardial effusion, which significantly impacts prognosis.*Throat swab for bacterial culture*- While useful to rule out **Scarlet fever**, this investigation does not address the primary life-threatening complications of the clinical picture presented.- **Kawasaki disease** is a clinical diagnosis and is not confirmed or excluded by the presence or absence of a bacterial throat infection.*Blood culture and viral PCR panel*- These tests are often performed to investigate **fever of unknown origin**, but they will not provide the immediate structural cardiac assessment needed here.- Elevated **inflammatory markers** (CRP, ESR, Neutrophilia) and **thrombocytosis** in this context point towards an inflammatory vasculitis rather than a simple viral or bacterial infection.*Chest X-ray and ECG*- An **ECG** is a supportive test that can show tachycardia or arrhythmia, but it lacks the sensitivity of **echocardiography** to visualize the **coronary arteries**.- A **chest X-ray** may show cardiomegaly if heart failure is present, but it is not the most important immediate tool for diagnosing specific vascular complications.*Lumbar puncture*- This is primarily used to investigate **meningitis** or **sepsis**, which can present with fever and rash, but the specific mucocutaneous findings here suggest a different pathology.- Performing a lumbar puncture would delay the critical **cardiac imaging** and the initiation of **IVIG** therapy required for Kawasaki disease.

Question 28: A 5-year-old boy with known asthma presents to the emergency department with an acute exacerbation. After initial treatment with high-flow oxygen, back-to-back nebulised salbutamol, ipratropium bromide, and oral prednisolone, his condition has not improved adequately after 1 hour. He remains tachypnoeic with respiratory rate 45/min, oxygen saturation 93% on high-flow oxygen, is speaking in words only, and appears exhausted. Peak flow remains at 40% predicted. What is the most appropriate next step in management?

A. Repeat nebulised salbutamol and ipratropium and reassess in 30 minutes
B. Commence intravenous magnesium sulphate infusion (Correct Answer)
C. Arrange transfer to paediatric intensive care for intubation and ventilation
D. Commence intravenous aminophylline infusion
E. Administer subcutaneous adrenaline

Explanation: ***Commence intravenous magnesium sulphate infusion***- This patient exhibits features of **acute severe asthma** (PEFR 40% predicted, speaking in words, tachypnoea, exhaustion) that has failed to improve after one hour of first-line therapies, necessitating **second-line intravenous treatment**.- **IV Magnesium Sulphate** acts as a potent bronchodilator by relaxing **bronchial smooth muscle** and is the recommended initial escalation step due to its favorable **safety profile** compared to aminophylline.*Repeat nebulised salbutamol and ipratropium and reassess in 30 minutes*- The patient has already received back-to-back nebulisers with no adequate improvement and shows signs of **exhaustion**, indicating a need for more aggressive therapy, not simply repeating a failing regimen.- Persistent **hypoxia (SpO2 93%)** on high-flow oxygen and a low peak flow after treatment highlight the urgency for **parenteral therapy** rather than further delay.*Arrange transfer to paediatric intensive care for intubation and ventilation*- While the patient's exhaustion is concerning, **intubation** is a last-resort for **life-threatening asthma** (e.g., silent chest, cyanosis, altered consciousness) or impending respiratory arrest.- Medical management with **IV bronchodilators** should be attempted first unless there are immediate signs of **respiratory failure** or cardiac arrest.*Commence intravenous aminophylline infusion*- **Aminophylline** is typically considered if there is an inadequate response to **IV Magnesium Sulphate** or in cases of near-fatal asthma, making it a third-line option.- It requires close **therapeutic drug monitoring** due to its narrow therapeutic index and higher risk of **arrhythmias** and toxicity, making magnesium a safer initial choice.*Administer subcutaneous adrenaline*- **Subcutaneous adrenaline** is primarily indicated for **anaphylaxis** and is not a standard treatment for an acute asthma exacerbation in this context.- It does not provide significant additional benefit over **inhalational or intravenous beta-agonists** for managing an asthma exacerbation.

Question 29: A 10-month-old infant with bronchiolitis has been admitted for observation. On assessment, the respiratory rate is 65/min, oxygen saturation 90% on air, with moderate subcostal and intercostal recession. The infant is alert, taking 30% of normal feeds orally, and has passed adequate urine. Which of the following represents the most appropriate immediate management?

A. Start supplemental oxygen via nasal cannula to maintain saturations above 92%
B. Insert nasogastric tube for feeding and start supplemental oxygen to maintain saturations above 92% (Correct Answer)
C. Commence high-flow humidified oxygen therapy via nasal cannula
D. Start nebulised salbutamol and reassess response
E. Commence CPAP (continuous positive airway pressure) ventilation

Explanation: ***Insert nasogastric tube for feeding and start supplemental oxygen to maintain saturations above 92%***- This infant meets the criteria for both **supplemental oxygen** (saturation <92%) and **fluid support** (oral intake <50% of normal) according to NICE guidelines for **bronchiolitis**.- **Nasogastric feeding** is the preferred method of hydration over IV fluids in these patients as it allows for continued use of the gut and is usually better tolerated.*Start supplemental oxygen via nasal cannula to maintain saturations above 92%*- While oxygen is necessary to treat the **hypoxia** (90% saturation), this approach fails to address the **inadequate oral intake** of only 30%.- Correct management must involve dual intervention when both **respiratory** and **hydration** thresholds are compromised.*Commence high-flow humidified oxygen therapy via nasal cannula*- **HFNC therapy** is generally reserved for patients who do not respond to standard low-flow oxygen or show signs of **looming respiratory failure**.- This infant is alert and has only moderate recession, making **standard supplemental oxygen** the more appropriate first-line respiratory support.*Start nebulised salbutamol and reassess response*- **Bronchodilators** like salbutamol are not recommended in the management of bronchiolitis because the underlying pathology is **airway edema** and mucus, not bronchospasm.- Clinical trials have shown that **salbutamol** does not significantly reduce the rate of hospitalization or the duration of stay.*Commence CPAP (continuous positive airway pressure) ventilation*- **CPAP** is an advanced intervention for infants with **impending respiratory failure**, exhaustion, or recurrent **apnea**.- This infant's clinical status (alert and moderate recession) does not yet justify the use of **non-invasive ventilation**.

Question 30: A 2-year-old girl presents with a 3-day history of fever up to 39.8°C. She has been increasingly irritable and refusing to bear weight on her right leg for the past 24 hours. On examination, her temperature is 38.9°C, heart rate 145/min. She has marked tenderness and restricted range of movement of the right hip with pain on passive movement. There is no overlying erythema or swelling. Blood tests show WCC 16.2 × 10⁹/L, CRP 78 mg/L, ESR 62 mm/hr. What is the most appropriate next investigation?

A. Plain radiograph of the hip followed by ultrasound if normal
B. MRI scan of the hip and femur
C. Urgent ultrasound of the hip followed by aspiration if effusion present (Correct Answer)
D. Blood culture and start empirical intravenous antibiotics immediately
E. CT scan of the pelvis and hip

Explanation: ***Urgent ultrasound of the hip followed by aspiration if effusion present***- The clinical presentation of high fever, refusal to bear weight, and elevated inflammatory markers (CRP 78 mg/L, ESR 62 mm/hr) strongly suggests **septic arthritis**, which is a medical emergency that requires prompt diagnosis and management.- **Urgent ultrasound** is the most sensitive and rapid investigation for detecting a hip joint **effusion** in a child, and if present, **aspiration** of the fluid is crucial for definitive diagnosis via cell count and culture before initiating targeted antibiotic therapy.*Plain radiograph of the hip followed by ultrasound if normal*- **Plain radiographs** are frequently normal in the early stages of septic arthritis and therefore should not delay more sensitive and urgent investigations like ultrasound.- While useful to exclude **fractures** or other bony pathologies, they cannot definitively rule out an infected joint space, making them a less appropriate first step when septic arthritis is highly suspected.*MRI scan of the hip and femur*- **MRI** is highly sensitive for detecting early osteomyelitis and soft tissue changes, but it is a time-consuming procedure and often requires **sedation** in a 2-year-old, delaying immediate diagnosis and intervention for septic arthritis.- It is not the practical first-line emergency investigation for suspected **septic arthritis** when rapid assessment and intervention (like joint aspiration) are paramount and ultrasound is readily available.*Blood culture and start empirical intravenous antibiotics immediately*- While **blood cultures** and **empirical intravenous antibiotics** are essential components of managing suspected septic arthritis, the most critical step is to obtain a **synovial fluid sample** through aspiration to identify the causative pathogen.- Initiating antibiotics without first collecting joint fluid cultures can significantly reduce the diagnostic yield, making **aspiration** a priority before empirical treatment, unless the patient is critically unstable.*CT scan of the pelvis and hip*- **CT scans** are generally not indicated as a first-line investigation for suspected septic arthritis in children due to significant **radiation exposure** and inferior soft tissue detail compared to ultrasound or MRI for joint effusions.- Furthermore, CT does not provide the therapeutic and diagnostic benefit of **joint aspiration**, which is crucial for managing an infected hip joint.

Question 31: What is the recommended first-line add-on therapy for a 7-year-old child with asthma who remains poorly controlled on a paediatric low-dose inhaled corticosteroid (beclometasone 200 micrograms daily equivalent)?

A. Increase inhaled corticosteroid to moderate dose
B. Add a leukotriene receptor antagonist (Correct Answer)
C. Add a long-acting beta-2 agonist
D. Add theophylline
E. Add oral prednisolone maintenance therapy

Explanation: ***Add a leukotriene receptor antagonist*** - According to **NICE guidelines** for children aged 5–16 years, if asthma is uncontrolled on **low-dose ICS**, the next step is adding a **leukotriene receptor antagonist (LTRA)** like **montelukast**. - This approach is prioritized in this age group to improve control before introducing long-acting bronchodilators or increasing steroid doses. *Increase inhaled corticosteroid to moderate dose* - Increasing to a **moderate dose ICS** is typically reserved for children who remain uncontrolled even after trials of **add-on therapies** like LTRAs or LABAs. - Routine escalation of steroids is avoided early in children to minimize the risk of **systemic side effects** such as growth suppression. *Add a long-acting beta-2 agonist* - While previously recommended first-line, current **NICE guidance** for this age group suggests a trial of an **LTRA** before adding a **long-acting beta-2 agonist (LABA)**. - If an LTRA is ineffective or not tolerated, the clinical pathway then moves toward **LABA therapy** in combination with ICS. *Add theophylline* - **Theophylline** is considered a **fourth-line** or specialist-initiated therapy for severe asthma that is refractory to standard treatments. - It requires **therapeutic drug monitoring** due to its narrow therapeutic index and significant side-effect profile. *Add oral prednisolone maintenance therapy* - **Oral prednisolone maintenance** is the final step in the management ladder, used only for **severe, refractory asthma**. - This treatment is managed exclusively by **specialist pediatric respiratory clinics** due to the high risk of adrenal suppression and other long-term steroid complications.

Question 32: A 4-month-old infant presents to the emergency department with a 2-hour history of fever reaching 38.9°C. The baby was born at term with no perinatal complications and has been well until now. On examination, the infant is alert, feeding normally, has good peripheral perfusion, and no focal signs are identified. Capillary refill time is 2 seconds. The parents are concerned but the baby appears comfortable. What is the most appropriate immediate management?

A. Discharge home with safety-netting advice and paracetamol as needed
B. Perform a full septic screen including blood culture, urine culture, and lumbar puncture, then start intravenous antibiotics (Correct Answer)
C. Observe in hospital for 4 hours with repeat observations and reassess before discharge
D. Prescribe oral antibiotics and arrange follow-up in 24 hours
E. Perform blood tests including full blood count, C-reactive protein, and blood culture, then await results

Explanation: ***Perform a full septic screen including blood culture, urine culture, and lumbar puncture, then start intravenous antibiotics***- According to **NICE guidelines (NG143)**, infants 3-6 months with a temperature ≥39°C are at high risk for **serious bacterial infection (SBI)**, even if appearing well.- Despite appearing comfortable, these infants require a mandatory **septic screen** and immediate **intravenous antibiotics** because they can deteriorate rapidly and clinical signs of meningitis or sepsis are often subtle.*Discharge home with safety-netting advice and paracetamol as needed*- Discharging a febrile infant of this age without investigations is unsafe due to the risk of **occult bacteremia** and **meningitis**.- Home management is only appropriate for older children with a **low-risk (green)** traffic light classification and an identifiable focus of infection.*Observe in hospital for 4 hours with repeat observations and reassess before discharge*- Observation alone is insufficient for an infant in this age group with a high fever as it delays the diagnosis and treatment of potential **serious bacterial infection**.- Clinical appearance is often an unreliable indicator of health status in **young febrile infants**, who can mask severe illness.*Prescribe oral antibiotics and arrange follow-up in 24 hours*- **Oral antibiotics** are inappropriate for initial management when **serious bacterial infection** is a concern in an infant under 6 months old.- Management must involve **parenteral antibiotics** (usually intravenous) until cultures return negative or a specific focus is identified.*Perform blood tests including full blood count, C-reactive protein, and blood culture, then await results*- Awaiting laboratory results before starting treatment is incorrect as it introduces dangerous delays in treating potential **sepsis** or **meningitis**.- **Empirical intravenous antibiotics** must be administered immediately after the septic screen samples are obtained in this high-risk age group.

Question 33: A 6-year-old boy with known asthma presents to the emergency department with acute breathlessness. On examination, he has a respiratory rate of 42/min, heart rate 138/min, oxygen saturation 91% on air, and is using accessory muscles. He is able to speak in short phrases. Peak expiratory flow rate is 45% of predicted. He has widespread polyphonic expiratory wheeze. Which of the following represents the most appropriate initial management?

A. High-flow oxygen, 10 puffs salbutamol via spacer, oral prednisolone, and nebulised ipratropium bromide
B. High-flow oxygen, 10 puffs salbutamol via spacer, and oral prednisolone only
C. High-flow oxygen, back-to-back nebulised salbutamol, oral prednisolone, and nebulised ipratropium bromide (Correct Answer)
D. High-flow oxygen, continuous nebulised salbutamol, oral prednisolone, and intravenous magnesium sulphate
E. High-flow oxygen, continuous nebulised salbutamol and ipratropium, oral prednisolone, and aminophylline infusion

Explanation: ***High-flow oxygen, back-to-back nebulised salbutamol, oral prednisolone, and nebulised ipratropium bromide*** - This patient exhibits features of **acute severe asthma**, defined by SpO2 <92% (91%), PEFR 33-50% (45%), and the use of **accessory muscles** while remaining conscious. - Management requires **back-to-back nebulised salbutamol** and **ipratropium bromide** (the latter added for severe/life-threatening cases) along with **systemic corticosteroids** (prednisolone). *High-flow oxygen, 10 puffs salbutamol via spacer, oral prednisolone, and nebulised ipratropium bromide* - While a spacer is effective in mild to moderate asthma, **nebulisation** is indicated in **severe asthma** to ensure adequate drug delivery when the patient is struggling to breathe. - Ipratropium bromide is typically administered via **nebuliser** alongside the beta-2 agonist in this clinical setting. *High-flow oxygen, 10 puffs salbutamol via spacer, and oral prednisolone only* - This regimen is more appropriate for **moderate asthma** where saturations are ">=92% and the patient is not in severe distress. - It lacks **ipratropium bromide**, which is recommended for patients with an inadequate response to initial treatment or those presenting with **severe features**. *High-flow oxygen, continuous nebulised salbutamol, oral prednisolone, and intravenous magnesium sulphate* - **Intravenous magnesium sulphate** is a second-line therapy reserved for **life-threatening asthma** or severe cases not responding to initial intensive nebulisation. - This patient is currently speaking in short phrases and is not yet in a **life-threatening** state (e.g., silent chest, cyanosis, or exhaustion). *High-flow oxygen, continuous nebulised salbutamol and ipratropium, oral prednisolone, and aminophylline infusion* - **Aminophylline** is a specialized treatment for patients who are not responding to maximal conventional therapy and usually requires **PICU consultation**. - Initiating **aminophylline** as part of the immediate “initial” management is premature for a patient who has not yet received first-line nebulised therapy.

Question 34: A 5-year-old boy is reviewed in the asthma clinic following his second admission for acute asthma in 3 months. He is currently on beclometasone 200 micrograms twice daily via a spacer, and uses salbutamol approximately 3-4 times per week. His mother reports he wakes with cough twice weekly and has to stop playing football once or twice per week due to wheeze. His inhaler technique is good and adherence is confirmed. What is the most appropriate next step in his management according to current guidelines?

A. Add a leukotriene receptor antagonist (montelukast 5 mg once daily) (Correct Answer)
B. Increase beclometasone to 400 micrograms twice daily
C. Add long-acting beta-agonist (salmeterol) to current therapy
D. Continue current therapy but increase frequency of follow-up
E. Consider referral to specialist paediatric respiratory service

Explanation: ***Add a leukotriene receptor antagonist (montelukast 5 mg once daily)*** - For children aged **5-12 years** with asthma poorly controlled on **low-dose inhaled corticosteroids (ICS)**, current guidelines recommend adding a **Leukotriene Receptor Antagonist (LTRA)** as the first-line add-on therapy. - This patient exhibits poor control (night symptoms, exercise limitation, and frequent **salbutamol** use), necessitating a step-up to **Step 3** of the management pathway. *Increase beclometasone to 400 micrograms twice daily* - Increasing the **ICS dose** to a moderate level is generally reserved for patients who remain uncontrolled after an adequate trial of add-on therapy like an **LTRA**. - Doubling the dose of steroids increases the risk of systemic side effects without necessarily offering superior control compared to adding an **LTRA** in this age group. *Add long-acting beta-agonist (salmeterol) to current therapy* - While **LABAs** are preferred add-on therapies in adults, they are generally considered after or alongside **LTRA** trials in the pediatric population aged **5-12**. - Guidelines prioritize **montelukast** because many children in this demographic show a significantly better clinical response to anti-leukotrienes than to **LABAs**. *Continue current therapy but increase frequency of follow-up* - This approach is inappropriate given the patient's **recent hospital admissions** and persistent **nocturnal symptoms**, indicating a high risk of further exacerbations. - Maintaining the same treatment level in a patient with validated **good technique** and **adherence** would be a failure to follow evidence-based escalation protocols. *Consider referral to specialist paediatric respiratory service* - **Specialist referral** is typically indicated if a child reaches **Step 4** (high-dose ICS) or if there is diagnostic uncertainty, rather than at the first sign of Step 2 failure. - Standard management guidelines allow primary or secondary care clinicians to initiate **Step 3** (adding an **LTRA**) before requiring a specialist tertiary review.

Question 35: A 10-month-old infant born at 32 weeks gestation with chronic lung disease presents with a 3-day history of coryzal symptoms, followed by rapid onset of respiratory distress. Examination shows respiratory rate 68/min, heart rate 162/min, oxygen saturation 88% on air, temperature 37.8°C, marked subcostal and intercostal recession, grunting, and bilateral fine crepitations with wheeze. He is taking only half his usual feeds. What is the single most important immediate management priority?

A. Provide supplemental oxygen to maintain saturations ≥92% (Correct Answer)
B. Commence nasogastric feeding to maintain hydration and nutrition
C. Administer trial of nebulised salbutamol
D. Obtain nasopharyngeal aspirate for RSV testing
E. Commence intravenous antibiotics for suspected bacterial pneumonia

Explanation: ***Provide supplemental oxygen to maintain saturations ≥92%***- The infant presents with severe **hypoxia (88% oxygen saturation)** and marked **respiratory distress**, making immediate **oxygen supplementation** the most critical priority to prevent respiratory failure.- Given the history of prematurity and **chronic lung disease**, this infant is at high risk for severe bronchiolitis, and maintaining oxygen saturations **≥92%** is crucial as per current guidelines.*Commence nasogastric feeding to maintain hydration and nutrition*- While the infant is taking only **half of the usual feeds**, addressing the life-threatening **hypoxia** and respiratory compromise takes absolute precedence over nutritional support.- Initiating **nasogastric feeding** in a severely dyspneic infant carries a risk of aspiration and can further increase respiratory effort, which is contraindicated before respiratory stabilization.*Administer trial of nebulised salbutamol*- Clinical evidence overwhelmingly shows that **bronchodilators** like salbutamol are largely ineffective in **bronchiolitis**, as the pathology is primarily inflammation and edema of the small airways, not bronchospasm.- Routine use of **salbutamol** is therefore not recommended in standard guidelines for infants presenting with bronchiolitis.*Obtain nasopharyngeal aspirate for RSV testing*- While identifying the viral etiology (e.g., **RSV**) through a **nasopharyngeal aspirate** is useful for infection control and surveillance, it is not an immediate therapeutic intervention.- This diagnostic step should not delay the **stabilization** of the patient's airway and breathing, which is the immediate management priority.*Commence intravenous antibiotics for suspected bacterial pneumonia*- The clinical picture of preceding **coryzal symptoms**, followed by rapid onset of respiratory distress with **wheeze** and **crepitations**, is highly characteristic of **viral bronchiolitis**.- **Antibiotics** are not indicated for viral infections and should only be considered if there is strong evidence of a **secondary bacterial infection**, such as persistent high fever or specific radiographic findings suggestive of pneumonia.

Question 36: A 3-year-old girl with asthma on beclometasone 200 micrograms twice daily presents with acute wheeze. She receives salbutamol nebuliser and oral prednisolone in the emergency department. One hour after treatment, she has oxygen saturation 96% on air, respiratory rate 28/min, heart rate 110/min, and can speak in full sentences with occasional wheeze audible. What is the most appropriate management plan?

A. Discharge immediately without follow-up as symptoms have resolved
B. Increase beclometasone to 400 micrograms twice daily and discharge
C. Discharge home with advice to continue salbutamol 4-6 hourly and complete 3-day course of prednisolone (Correct Answer)
D. Admit for overnight observation and continue nebulised salbutamol 4-hourly
E. Observe for a further 2 hours and repeat salbutamol nebuliser before discharge

Explanation: ***Discharge home with advice to continue salbutamol 4-6 hourly and complete 3-day course of prednisolone*** - The patient shows signs of a **good clinical response** following treatment, including **SpO2 ≥94%**, normal respiratory rate for her age, and ability to speak in **full sentences**. - Standard management for resolving acute asthma involves finishing a **3-day course of prednisolone** and weaning **salbutamol via a spacer** to prevent early relapse. *Discharge immediately without follow-up as symptoms have resolved* - Immediate discharge without a clear **management plan** or follow-up is unsafe; patients require a **GP review within 2 working days** after an acute exacerbation. - Neglecting the completion of **oral corticosteroids** significantly increases the risk of a rebound exacerbation. *Increase beclometasone to 400 micrograms twice daily and discharge* - Adjustments to **preventer therapy (ICS)** are usually made at a follow-up appointment after investigating the patient's usual **asthma control** and technique. - Doubling the dose of inhaled steroids is no longer recommended as an acute strategy during the **exacerbation recovery phase** over oral steroids. *Admit for overnight observation and continue nebulised salbutamol 4-hourly* - Admission is not indicated because the child is **hemodynamically stable**, maintains **saturations >94% on air**, and does not require frequent nebulizers. - **BTS/SIGN guidelines** allow for discharge if the patient is stable for at least **one hour** post-treatment and the parents can manage at home. *Observe for a further 2 hours and repeat salbutamol nebuliser before discharge* - Further **observation** is unnecessary as the child has already met clinical stability criteria and can transition to **spacer-delivered salbutamol**. - Repeated **nebulization** is not required for a child who is clinically well and able to speak in full sentences with minimal wheezing.

Question 37: A 16-month-old child presents with a 5-day history of fever peaking at 40.3°C, extreme irritability, and refusal to walk. Examination reveals bilateral bulbar conjunctival injection without discharge, strawberry tongue, erythema and oedema of hands and feet, a polymorphous rash, and right-sided cervical lymphadenopathy >1.5 cm. Initial echocardiogram shows small coronary artery ectasia (Z-score +2.8). She has received one dose of IVIG 2 g/kg. After 48 hours, she remains febrile at 39.1°C. What is the most appropriate next management step?

A. Start intravenous methylprednisolone 30 mg/kg/day for 3 days
B. Increase aspirin dose to 100 mg/kg/day in divided doses
C. Add oral ciclosporin and continue high-dose aspirin
D. Administer a second dose of IVIG 2 g/kg (Correct Answer)
E. Give infliximab 5 mg/kg as a single infusion

Explanation: ***Administer a second dose of IVIG 2 g/kg*** - This patient meets criteria for **refractory Kawasaki disease**, defined by persistent or recrudescent fever at least 36–48 hours after the initial **IVIG** infusion. - A **second dose of IVIG** (2 g/kg) is the standard recommended first-line therapy for IVIG resistance to reduce the risk of further **coronary artery ectasia**. *Start intravenous methylprednisolone 30 mg/kg/day for 3 days* - While **pulse steroids** are used in refractory cases, they are typically reserved for patients who fail a second dose of IVIG or as an adjunct in very high-risk situations. - Current guidelines prioritize a repeat of the **IVIG** before escalating to high-dose systemic corticosteroids in most treatment algorithms. *Increase aspirin dose to 100 mg/kg/day in divided doses* - High-dose **aspirin** has anti-inflammatory properties but does not independently resolve **IVIG resistance** or reduce the incidence of **coronary artery abnormalities**. - Management focuses on immunomodulation rather than simply increasing salicylate dosage, which also carries a risk of **Reye syndrome** or toxicity. *Add oral ciclosporin and continue high-dose aspirin* - **Ciclosporin** is an immunosuppressant typically reserved for highly refractory cases or specialized rescue therapy, not as the immediate next step. - It is not considered first-line for **IVIG-resistant** Kawasaki disease until more established therapies have failed. *Give infliximab 5 mg/kg as a single infusion* - **Infliximab** (a TNF-alpha inhibitor) is an effective alternative for refractory disease, but it is generally considered after or alongside a second dose of **IVIG**. - Although some centers use it earlier in high-risk patients, repeat **IVIG** remains the most widely accepted and conventional next management step.

Question 38: A 2-year-old boy with known viral-induced wheeze attends the emergency department with breathlessness and wheeze. He has received 3 doses of salbutamol via spacer in the last hour. On examination, he is alert, speaking in short sentences, has widespread expiratory wheeze, respiratory rate 38/min, heart rate 128/min, and oxygen saturation 94% on air. What is the most appropriate next step in acute management?

A. Admit for observation and continue salbutamol via spacer every 4 hours
B. Give oral prednisolone 20 mg and observe for response (Correct Answer)
C. Administer salbutamol nebuliser driven by oxygen
D. Add ipratropium bromide nebuliser with salbutamol
E. Discharge with increased frequency of salbutamol inhaler at home

Explanation: ***Give oral prednisolone 20 mg and observe for response*** - This patient presents with a **moderate exacerbation** of viral-induced wheeze, characterized by breathlessness, speaking in short sentences, and inadequate response to three doses of **salbutamol** via spacer within an hour. - **Oral corticosteroids**, such as prednisolone, are indicated in children with moderate acute wheeze exacerbations who do not respond adequately to initial bronchodilator therapy to reduce **airway inflammation** and improve outcomes. *Admit for observation and continue salbutamol via spacer every 4 hours* - Continuing salbutamol every 4 hours is insufficient for a child who has already shown inadequate response to three doses in a shorter period, indicating the need for more intensive management. - While admission for observation may be necessary, this step alone does not address the underlying **airway inflammation** and is not the most appropriate immediate pharmacological intervention. *Administer salbutamol nebuliser driven by oxygen* - For mild-to-moderate wheeze in children, **salbutamol via spacer and mask** is equally effective and often preferred over nebulizers, especially when the child is alert. - Nebulisers driven by oxygen are typically reserved for **severe exacerbations** or when the child is unable to use a spacer effectively, which is not the primary issue here given the 94% saturation. *Add ipratropium bromide nebuliser with salbutamol* - **Ipratropium bromide** is primarily indicated as an adjunct therapy in the management of **acute severe asthma** or wheeze, or in cases of very poor response to high-dose beta-agonists. - While it can be considered in severe cases, the priority in a moderate exacerbation failing initial bronchodilators is the addition of **systemic corticosteroids** to target inflammation. *Discharge with increased frequency of salbutamol inhaler at home* - Discharge is inappropriate as the child is still symptomatic, showing signs of respiratory distress (e.g., speaking in short sentences, elevated respiratory rate, oxygen saturation 94%). - Clinical stability, significant symptom improvement, and maintenance of **oxygen saturations** without distress are prerequisites for safe discharge, which are not met here.

Question 39: A 9-month-old infant with a 2-day history of coryzal symptoms and cough now presents with increased work of breathing. On examination, respiratory rate is 58/min, heart rate 148/min, oxygen saturation 93% on air, temperature 38.1°C. There is subcostal recession, nasal flaring, and widespread fine inspiratory crepitations with expiratory wheeze. What is the most likely diagnosis?

A. Bronchiolitis (Correct Answer)
B. Viral-induced wheeze
C. Pneumonia
D. First presentation of asthma
E. Foreign body aspiration

Explanation: ***Bronchiolitis*** - This infant presents with the classic clinical triad of a **coryzal prodrome**, increased **work of breathing**, and **widespread fine inspiratory crepitations** with an expiratory wheeze. - It is most commonly caused by **Respiratory Syncytial Virus (RSV)** and primarily affects infants **under 12 months** of age, peaking between 3-6 months. *Viral-induced wheeze* - Typically occurs in children **older than 12 months** and is characterized by wheezing without the prominent **fine crepitations** seen in bronchiolitis. - It often presents with a more **recurrent pattern** in response to viral infections rather than the distinct seasonal presentation of bronchiolitis. *Pneumonia* - Usually presents with a **higher fever**, focal (rather than widespread) chest signs, and **coarse crepitations**. - While respiratory distress is present, the presence of a **diffuse expiratory wheeze** makes pneumonia less likely than bronchiolitis in this age group. *First presentation of asthma* - Asthma is rarely diagnosed as a first presentation in an infant **under 1 year** of age and typically requires a pattern of **reversibility** and recurrence. - The clinical picture of fine crepitations and a first-time wheeze during a coryzal illness in an infant strongly favors **bronchiolitis** over asthma. *Foreign body aspiration* - Classically presents with a **sudden onset** of choking or respiratory distress, usually without the **coryzal prodrome** or fever. - On examination, it typically results in **unilateral** or focal findings like localized wheeze or reduced breath sounds, rather than **widespread crepitations**.

Question 40: A 4-year-old girl presents to the emergency department with a 2-hour history of fever to 39.8°C, lethargy, and a non-blanching purpuric rash on her legs. She is pale, has cool peripheries, capillary refill time of 4 seconds, heart rate 165/min, blood pressure 85/50 mmHg, and respiratory rate 38/min. She has received one fluid bolus of 20 ml/kg 0.9% saline. What is the most appropriate next immediate step?

A. Administer a second fluid bolus of 20 ml/kg 0.9% saline
B. Give intravenous ceftriaxone 80 mg/kg immediately (Correct Answer)
C. Arrange urgent transfer to paediatric intensive care unit
D. Perform blood cultures, FBC, CRP, coagulation screen, and blood gas
E. Commence inotropic support with dopamine infusion

Explanation: ***Give intravenous ceftriaxone 80 mg/kg immediately*** - The combination of **fever, lethargy, non-blanching purpuric rash**, and signs of **shock** (pale, cool peripheries, prolonged CRT, hypotension, tachycardia) is highly indicative of **meningococcal septicaemia**, a medical emergency requiring immediate antibiotic treatment. - **Intravenous ceftriaxone (or cefotaxime)** must be administered without delay, as prompt antibiotic therapy is critical for improving outcomes and reducing mortality in suspected **bacterial sepsis** and **meningococcal disease**. *Administer a second fluid bolus of 20 ml/kg 0.9% saline* - While the child is still in **shock** and will likely require further fluid resuscitation (having received only one bolus), the **immediate administration of antibiotics** for suspected meningococcal disease takes precedence to target the infection. - **Fluid boluses** help manage circulatory compromise, but they do not address the underlying **bacterial infection**, which is the primary cause of rapid deterioration in this life-threatening condition. *Arrange urgent transfer to paediatric intensive care unit* - **Urgent PICU transfer** is necessary for ongoing advanced management of **septicaemic shock**, but **initial stabilization** and **life-saving interventions**, such as immediate antibiotic administration, must occur first in the emergency department. - Transfer arrangements should never delay the most critical early treatments for **airway, breathing, and circulation**, especially controlling the source of infection. *Perform blood cultures, FBC, CRP, coagulation screen, and blood gas* - Although these **diagnostic investigations** are essential for confirming the diagnosis and guiding management, they must **never delay the immediate administration of antibiotics** in a child with suspected meningococcal septicaemia. - If intravenous access is established, blood for cultures should be drawn **simultaneously or immediately prior** to antibiotic administration, but the antibiotic should not be withheld pending these results. *Commence inotropic support with dopamine infusion* - **Inotropic support** is indicated for **fluid-refractory shock**, typically after multiple fluid boluses (e.g., 40-60 ml/kg) have failed to restore adequate circulation, and it is not the immediate first step. - Furthermore, current pediatric guidelines often recommend **adrenaline or noradrenaline** as the preferred first-line vasopressors for septic shock, rather than dopamine.

Question 41: What is the most appropriate interval for follow-up echocardiography in a child diagnosed with Kawasaki disease who had normal coronary arteries at presentation and received timely treatment with IVIG?

A. At 1-2 weeks and 6-8 weeks after treatment (Correct Answer)
B. At 48 hours, 1 week, and 1 month after treatment
C. Daily for 5 days then weekly for 1 month
D. At 1 week and 3 months after treatment
E. At 1 month and 6 months after treatment

Explanation: ***At 1-2 weeks and 6-8 weeks after treatment***- For patients with **uncomplicated Kawasaki disease** and normal coronary arteries, standard guidelines recommend repeat echocardiography at **1-2 weeks** and **6-8 weeks** post-acute phase.- This timeline captures the window when **coronary artery aneurysms** most commonly develop; if results remain normal at 8 weeks, **low-dose aspirin** therapy can typically be discontinued.*At 48 hours, 1 week, and 1 month after treatment*- This schedule is not standard for patients with **normal coronary arteries** at baseline; the 48-hour follow-up is generally unnecessary for outpatient monitoring.- A **6-8 week** scan is crucial for secondary prevention and risk stratification, making the 1-month interval less ideal for the final determination.*Daily for 5 days then weekly for 1 month*- **Daily echocardiography** is excessive and not indicated for a child showing normal baseline coronary morphology and rapid response to treatment.- This intensive level of monitoring is reserved for hemodynamically unstable patients or those with rapidly expanding **giant aneurysms**.*At 1 week and 3 months after treatment*- Waiting until **3 months** for the second scan is too late, as medical decisions regarding aspirin therapy are typically made at the **6-8 week** mark.- A 1-week scan alone is insufficient to confirm that delayed **coronary dilation** will not occur during the subacute phase.*At 1 month and 6 months after treatment*- This protocol ignores the critical **1-2 week** window where early changes associated with **vasculitis** may first appear on imaging.- A **6-month** interval is only indicated for patients who have already demonstrated persistent coronary abnormalities, not for those with **normal baseline** studies.

Question 42: A 13-month-old girl presents with a 6-day history of fever ranging from 38.8°C to 40.1°C. She is irritable with bilateral non-exudative conjunctivitis and a polymorphous rash on her trunk. Her lips are dry and cracked. Cervical lymphadenopathy is present. Blood tests show: WCC 18.5 × 10⁹/L, neutrophils 14.2 × 10⁹/L, CRP 145 mg/L, albumin 25 g/L, ALT 78 U/L, and platelets 498 × 10⁹/L. Echocardiography shows normal coronary arteries. She weighs 10 kg. What is the most appropriate definitive treatment?

A. Intravenous immunoglobulin 2 g/kg as a single infusion plus high-dose aspirin 80-100 mg/kg/day (Correct Answer)
B. Intravenous methylprednisolone 10 mg/kg/day for 3 days plus aspirin
C. Oral prednisolone 2 mg/kg/day plus low-dose aspirin 3-5 mg/kg/day
D. Intravenous ceftriaxone 80 mg/kg/day and supportive care
E. Infliximab 5 mg/kg as a single infusion plus aspirin

Explanation: ***Intravenous immunoglobulin 2 g/kg as a single infusion plus high-dose aspirin 80-100 mg/kg/day***- The patient's presentation with prolonged fever, non-exudative conjunctivitis, polymorphous rash, dry cracked lips, and cervical lymphadenopathy is classic for **Kawasaki disease**.- The definitive first-line treatment for acute Kawasaki disease is a single infusion of **IVIG (2 g/kg)** to reduce inflammation and prevent **coronary artery aneurysms**, along with high-dose **aspirin** for its anti-inflammatory effects.*Intravenous methylprednisolone 10 mg/kg/day for 3 days plus aspirin*- Pulse **corticosteroids** are typically considered for patients who are **refractory** to initial IVIG therapy, or in conjunction with IVIG in very high-risk cases.- They are not the standard single definitive first-line therapy for a classic presentation of Kawasaki disease.*Oral prednisolone 2 mg/kg/day plus low-dose aspirin 3-5 mg/kg/day*- Oral steroids are not the primary treatment for acute Kawasaki disease and do not replace the crucial role of **IVIG** in preventing cardiac complications.- **Low-dose aspirin** is used for its antiplatelet effect during the convalescent phase, after the acute febrile period has resolved, not as the primary anti-inflammatory dose.*Intravenous ceftriaxone 80 mg/kg/day and supportive care*- **Ceftriaxone** is an antibiotic, used for bacterial infections, but it is not effective against the underlying **vasculitis** of Kawasaki disease.- Treating Kawasaki disease with antibiotics alone would delay appropriate therapy, significantly increasing the risk of severe **coronary artery damage**.*Infliximab 5 mg/kg as a single infusion plus aspirin*- **Infliximab**, a TNF-alpha inhibitor, is a second-line or adjunctive therapy for Kawasaki disease, primarily used in patients who are **refractory to IVIG**.- It is not the initial definitive treatment and is used in conjunction with or after initial IVIG failure, not as a replacement for the primary IVIG/aspirin protocol.

Question 43: A 6-year-old boy with known asthma on beclometasone 200 micrograms twice daily presents to the emergency department. He is drowsy, has absent breath sounds bilaterally, silent chest on auscultation, oxygen saturation 88% on 15L oxygen via non-rebreather mask, heart rate 145/min, and respiratory rate 8/min. What is the most appropriate immediate next step in management?

A. Start non-invasive ventilation with continuous positive airway pressure
B. Immediate senior anaesthetic review for intubation and ventilation (Correct Answer)
C. Administer intravenous magnesium sulphate 40 mg/kg over 20 minutes
D. Give back-to-back salbutamol nebulisers with ipratropium
E. Commence intravenous aminophylline bolus and infusion

Explanation: ***Immediate senior anaesthetic review for intubation and ventilation*** - The patient presents with classic signs of **life-threatening asthma** and **impending respiratory arrest**, including **drowsiness**, **silent chest** (absent breath sounds), severe **hypoxia** (SpO2 88% on 15L O2), and marked **bradypnea** (respiratory rate 8/min). - In this critical state, **securing the airway** and providing **mechanical ventilation** are the absolute priorities to ensure adequate oxygenation and ventilation, especially given the altered consciousness and respiratory exhaustion. *Start non-invasive ventilation with continuous positive airway pressure* - **Non-invasive ventilation (NIV)** is generally contraindicated in patients with **altered consciousness** or **drowsiness** due to the high risk of aspiration and inability to protect their airway. - This patient requires **invasive mechanical ventilation** to manage severe respiratory failure and prevent further deterioration safely. *Administer intravenous magnesium sulphate 40 mg/kg over 20 minutes* - While **intravenous magnesium sulphate** is a valuable adjunctive treatment for severe acute asthma, it is not the immediate life-saving intervention when the patient is in **impending respiratory arrest**. - Administering a drug over 20 minutes is too slow for a patient with such profound respiratory distress and **bradypnea** who needs immediate airway and ventilatory support. *Give back-to-back salbutamol nebulisers with ipratropium* - A **silent chest** indicates extremely poor airflow to the lungs, rendering nebulised medications largely **ineffective** as they cannot reach the lower airways. - The patient's **drowsiness** and **bradypnea** signify respiratory exhaustion and failure, requiring immediate **ventilatory support** rather than continued, likely ineffective, nebuliser therapy. *Commence intravenous aminophylline bolus and infusion* - **Intravenous aminophylline** is considered a second- or third-line bronchodilator for severe asthma but is insufficient and too slow for a patient exhibiting signs of **hypoventilation** and **reduced level of consciousness**. - Prioritizing pharmacological infusions over immediate **airway management** and **mechanical ventilation** in a patient with impending respiratory arrest would be a dangerous delay in essential care.

Question 44: An 11-month-old infant presents with fever of 39.2°C for 3 hours. She is alert, interactive, and feeding normally. Examination reveals a red, bulging right tympanic membrane. There are no other abnormal findings. Her immunisations are up to date. What is the most appropriate initial management?

A. Arrange same-day paediatric assessment for potential sepsis
B. Prescribe amoxicillin 40 mg/kg/day in three divided doses (Correct Answer)
C. Provide advice on antipyretic use and safety-netting with delayed antibiotic prescription
D. Perform urine dipstick and culture before deciding on antibiotics
E. Prescribe co-amoxiclav 40 mg/kg/day in three divided doses

Explanation: ***Prescribe amoxicillin 40 mg/kg/day in three divided doses*** - For an infant **under 2 years** of age with symptoms of **acute otitis media (AOM)**, specifically a **red, bulging tympanic membrane**, immediate antibiotic therapy is recommended. - **Amoxicillin** is the first-line treatment for uncomplicated pediatric AOM due to its effectiveness against common pathogens like *Streptococcus pneumoniae*. *Arrange same-day paediatric assessment for potential sepsis* - The infant is described as **alert, interactive, and feeding normally**, indicating clinical stability and an absence of **red-flag features** for sepsis. - A clear source of infection (AOM) has been identified, making an urgent **paediatric assessment** for sepsis unnecessary at this point. *Provide advice on antipyretic use and safety-netting with delayed antibiotic prescription* - **Delayed prescribing** is generally reserved for children older than 2 years who are systemically well or those with mild, unilateral AOM without severe features. - Guidelines advise **immediate antibiotics** for infants under 2 years with a definitive diagnosis of AOM and a **bulging tympanic membrane** to reduce the risk of complications. *Perform urine dipstick and culture before deciding on antibiotics* - While urinary tract infections (UTIs) can cause fever in infants, the presence of a **red, bulging tympanic membrane** strongly points to **acute otitis media** as the source of fever. - Prioritizing **urinalysis** before addressing the clear signs of AOM is not the most appropriate initial step in a non-toxic appearing infant. *Prescribe co-amoxiclav 40 mg/kg/day in three divided doses* - **Co-amoxiclav** (amoxicillin-clavulanate) is a broader-spectrum antibiotic and is typically reserved for **treatment failure** with amoxicillin or in cases with specific risk factors for resistant organisms. - Using it as first-line therapy for uncomplicated AOM increases the risk of **antibiotic resistance** and potential side effects such as diarrhea.

Question 45: A 3-year-old boy with recurrent wheeze is reviewed in clinic. His mother describes episodes of wheeze occurring only during viral upper respiratory tract infections, with complete resolution between episodes. He has no interval symptoms, no nocturnal cough, and normal activity levels. He has required salbutamol approximately 4 times in the past year. What is the most appropriate management strategy?

A. Prescribe salbutamol inhaler with spacer for use as needed during viral illnesses (Correct Answer)
B. Start regular beclometasone 100 micrograms twice daily
C. Start montelukast 4 mg once daily
D. Prescribe both salbutamol and ipratropium bromide for acute episodes
E. Arrange skin prick testing for common allergens

Explanation: ***Prescribe salbutamol inhaler with spacer for use as needed during viral illnesses*** - This child presents with **episodic viral-induced wheeze (EVW)**, characterized by symptoms only during viral infections and a complete absence of **interval symptoms**. - Since episodes are infrequent and there is no **nocturnal cough** or activity limitation, intermittent treatment with a **short-acting beta-agonist (SABA)** via a spacer is the first-line management. *Start regular beclometasone 100 micrograms twice daily* - **Inhaled corticosteroids (ICS)** are indicated for **multiple-trigger wheeze** or asthma where symptoms occur between viral infections. - Regular preventer therapy is not recommended for EVW when the child is **asymptomatic** between episodes and episodes are manageable. *Start montelukast 4 mg once daily* - **Leukotriene receptor antagonists (LTRAs)** are generally used as second-line therapy for persistent asthma or if viral-induced wheeze is severe and frequent. - Starting a daily medication is unnecessary for a child with no **interval symptoms** and only four mild episodes in a year. *Prescribe both salbutamol and ipratropium bromide for acute episodes* - **Ipratropium bromide** is reserved for severe acute exacerbations in a hospital setting and is not standard for home management of mild EVW. - Monotherapy with **salbutamol** is the appropriate clinical standard for relieving mild bronchospasm during viral illnesses. *Arrange skin prick testing for common allergens* - **Skin prick testing** is used to identify triggers in **atopic asthma**, where symptoms are often triggered by allergens like dust or pet dander. - This child’s history clearly identifies **viral upper respiratory infections** as the sole trigger, making allergy testing unnecessary for diagnosis.

Question 46: A 5-year-old girl presents with fever of 39.4°C for 48 hours. She has a widespread maculopapular rash, bilateral non-purulent conjunctivitis, cracked red lips, and cervical lymphadenopathy. Her hands and feet appear edematous and erythematous. Blood tests show: WCC 16.2 × 10⁹/L, CRP 112 mg/L, ESR 58 mm/hr, platelets 542 × 10⁹/L, and albumin 28 g/L. What is the single most important immediate investigation to guide management?

A. Echocardiography to assess for coronary artery abnormalities (Correct Answer)
B. Blood cultures before starting antibiotics
C. Lumbar puncture to exclude meningitis
D. Throat swab for Group A Streptococcus
E. Autoantibody screen including ANA and ANCA

Explanation: ***Echocardiography to assess for coronary artery abnormalities*** - This patient presents with the classic features of **Kawasaki disease**, including prolonged fever, **maculopapular rash**, **bilateral non-purulent conjunctivitis**, **cracked red lips**, **cervical lymphadenopathy**, and **edematous, erythematous hands and feet**, along with elevated inflammatory markers. - **Echocardiography** is the most critical immediate investigation to detect **coronary artery aneurysms**, a life-threatening complication, which guides urgent initiation of **IVIG** and **aspirin** therapy. *Blood cultures before starting antibiotics* - While fever of unknown origin often warrants **blood cultures**, the specific constellation of signs (mucosal changes, extremity edema) makes **Kawasaki disease** a more likely diagnosis than typical bacterial sepsis. - Although generally performed, blood cultures would not provide the most critical information for guiding immediate, disease-specific management in this suspected **vasculitis**. *Lumbar puncture to exclude meningitis* - Although **aseptic meningitis** can rarely occur in **Kawasaki disease**, the primary clinical picture is dominated by features of a systemic **vasculitis**, not central nervous system infection. - A **lumbar puncture** is an invasive procedure and is not the most immediate or important investigation for guiding therapy aimed at preventing **cardiac complications** in this scenario. *Throat swab for Group A Streptococcus* - **Scarlet fever** (due to Group A Streptococcus) can cause fever and rash but typically lacks the prominent **conjunctivitis**, **cracked lips**, and distinct **extremity edema** seen in this patient. - A **throat swab** result would not be available immediately to guide urgent management decisions for **Kawasaki disease** and its potential **cardiac sequelae**. *Autoantibody screen including ANA and ANCA* - **Kawasaki disease** is a **clinical diagnosis** supported by inflammatory markers, not by specific autoantibodies like **ANA** or **ANCA**. - These autoantibody screens are more relevant for diagnosing chronic autoimmune or systemic vasculitic conditions and would not guide the acute, time-sensitive management of suspected **Kawasaki disease**.

Question 47: A 7-year-old boy with asthma is assessed in the emergency department. He is sitting upright, speaking in short phrases, has a respiratory rate of 32/min, heart rate 128/min, and oxygen saturation 91% on air. Widespread expiratory wheeze is audible. After initial bronchodilator therapy, what is the most appropriate immediate treatment to prevent admission to intensive care?

A. Intravenous magnesium sulphate 40 mg/kg over 20 minutes (Correct Answer)
B. Oral prednisolone 30 mg once daily for 3 days
C. Intravenous salbutamol infusion
D. Intravenous aminophylline bolus followed by infusion
E. Non-invasive ventilation with bilevel positive airway pressure

Explanation: ***Intravenous magnesium sulphate 40 mg/kg over 20 minutes***- This patient exhibits features of **acute severe asthma** (SpO2 91%, HR 128/min, RR 32/min); intravenous magnesium sulphate is the recommended next step for those not responding to initial **bronchodilators**.- Magnesium acts as a **smooth muscle relaxant** and has been shown to improve lung function and significantly reduce the need for **ITU admission**.*Oral prednisolone 30 mg once daily for 3 days*- While **corticosteroids** are essential in asthma management, they should be administered as part of the **initial therapy** and take several hours to take effect.- In the acute setting where there is poor response to initial bronchodilators, more **rapid-acting intravenous interventions** are required to prevent clinical deterioration.*Intravenous salbutamol infusion*- This is generally considered a **second-line** intravenous treatment and is often reserved for those who remain refractory to **IV magnesium sulphate**.- It carries a higher risk of side effects like **tachycardia** and **hypokalemia**, necessitating closer cardiac monitoring than magnesium.*Intravenous aminophylline bolus followed by infusion*- Aminophylline is typically used in cases of **life-threatening asthma** or when there is an inadequate response to both magnesium and salbutamol.- It has a **narrow therapeutic index** and requires drug level monitoring due to the risk of significant toxicity.*Non-invasive ventilation with bilevel positive airway pressure*- **NIV** is not a routine part of the management of acute asthma in children and is rarely used outside of a **critical care** environment.- Management focuses on pharmacological reversal of **bronchospasm**; if this fails, more invasive measures like **intubation** are usually preferred over BiPAP.

Question 48: A 9-year-old boy with poorly controlled asthma is currently on fluticasone 250 micrograms twice daily and salbutamol as needed. He uses his salbutamol inhaler daily, wakes with cough twice per week, and has had three courses of oral prednisolone in the past year for acute exacerbations. His parents report that despite prescriptions being collected, they sometimes forget to give the evening dose of preventer. Inhaler technique check shows he uses his metered-dose inhaler without a spacer, taking shallow breaths without breath-holding. What factor is most likely contributing significantly to his poor asthma control?

A. Suboptimal inhaler technique leading to poor drug delivery to the airways (Correct Answer)
B. Inadequate dose of inhaled corticosteroid requiring step-up to high-dose therapy
C. Undiagnosed environmental triggers such as house dust mite or pet allergen exposure
D. Poor treatment adherence with missed doses of regular preventer medication
E. Development of steroid resistance requiring alternative immunomodulatory therapy

Explanation: ***Suboptimal inhaler technique leading to poor drug delivery to the airways*** - The patient's use of a **metered-dose inhaler (MDI)** without a **spacer**, along with shallow breaths and no **breath-hold**, critically impairs the delivery of medication to the lungs. - For children, ensuring correct **inhaler technique** is a fundamental first step in addressing uncontrolled asthma, as even adequate doses are ineffective if not properly delivered. *Inadequate dose of inhaled corticosteroid requiring step-up to high-dose therapy* - **Escalating the dose** is premature when fundamental issues like **inhaler technique** and **adherence** are unaddressed, especially since his current fluticasone dose is already considered medium. - Increasing the dose would not improve control if the medication does not reach the **lower airways** due to improper technique. *Undiagnosed environmental triggers such as house dust mite or pet allergen exposure* - While **environmental triggers** can exacerbate asthma, the documented **poor inhaler technique** represents a more direct and immediately addressable cause of poor control. - Investigating environmental triggers is typically considered after optimizing **medication delivery** and **adherence**. *Poor treatment adherence with missed doses of regular preventer medication* - Although parents report occasional **missed doses**, the problem with **inhaler technique** during the doses that *are* taken is a constant barrier to effective treatment. - Both **adherence** and **technique** are important, but the detailed description of incorrect MDI use points to drug delivery as the most significant primary issue. *Development of steroid resistance requiring alternative immunomodulatory therapy* - **Steroid resistance** is a rare diagnosis, usually considered only after meticulous confirmation of **adherence**, **correct inhaler technique**, and exclusion of other comorbidities. - It would be clinically inappropriate to consider **immunomodulatory therapy** before rectifying basic, modifiable factors like **inhaler technique**.

Question 49: A 5-month-old infant is brought to the emergency department with a 12-hour history of fever to 38.6°C and refusing feeds. She has taken only 50ml of her usual 150ml per feed over the past 12 hours. She was born at 38 weeks gestation following an uncomplicated pregnancy and delivery. On examination, she is irritable, has dry mucous membranes, heart rate 160 bpm, respiratory rate 50/min, temperature 38.4°C, and capillary refill time 3 seconds centrally. There are no focal signs of infection. Urine dipstick shows leucocytes ++, nitrites positive, protein +, blood negative. What is the most appropriate management?

A. Admit for observation, encourage oral fluids, send urine for culture, and start antibiotics if culture confirms infection
B. Send urine for microscopy and culture, commence oral antibiotics, and arrange review within 24 hours
C. Admit for intravenous antibiotics after sending urine and blood cultures, and provide intravenous fluids for dehydration (Correct Answer)
D. Send urine for culture, obtain blood tests including inflammatory markers, give intramuscular ceftriaxone, and review in 24 hours
E. Perform full septic screen including lumbar puncture, commence intravenous ceftriaxone and amoxicillin immediately

Explanation: ***Admit for intravenous antibiotics after sending urine and blood cultures, and provide intravenous fluids for dehydration***- This infant has a **Urinary Tract Infection (UTI)** (nitrite and leukocyte positive) with systemic features and **dehydration** (reduced intake, tachycardia, and 3s capillary refill).- According to **NICE guidelines**, infants over 3 months with signs of **dehydration** or an inability to tolerate oral fluids require **hospital admission** and **intravenous antibiotics**.*Admit for observation, encourage oral fluids, send urine for culture, and start antibiotics if culture confirms infection*- Delaying treatment until culture results are available is dangerous in a febrile, **dehydrated infant** who likely has pyelonephritis.- Encouraging oral fluids is insufficient when the infant is already **refusing feeds** and showing clinical signs of dehydration.*Send urine for microscopy and culture, commence oral antibiotics, and arrange review within 24 hours*- **Oral antibiotics** are inappropriate here because the child is significantly unwell and may not absorb or tolerate the medication.- Outpatient management is unsafe given the **systemic involvement** and necessity for **fluid resuscitation**.*Send urine for culture, obtain blood tests including inflammatory markers, give intramuscular ceftriaxone, and review in 24 hours*- **Intramuscular antibiotics** do not address the urgent need for **rehydration** via the intravenous route.- A 24-hour review is too late for an irritable infant with a prolonged **capillary refill time** and significant feed refusal.*Perform full septic screen including lumbar puncture, commence intravenous ceftriaxone and amoxicillin immediately*- While a septic screen is considered in young infants, a **lumbar puncture** is not routinely indicated for a clear source like a UTI unless **meningitis** is clinically suspected.- Dual therapy with **amoxicillin** is typically reserved for infants under 3 months to cover *Listeria*, which is less relevant in this 5-month-old.

Question 50: A 3-year-old girl with recurrent wheeze is reviewed in the outpatient clinic. Her mother reports that she experiences episodes of wheeze approximately every 6-8 weeks, typically triggered by viral upper respiratory tract infections. Between episodes, she is completely asymptomatic with no wheeze, cough, or activity limitation. She has had four episodes requiring salbutamol in the past year but has never required hospital admission. Her father has asthma. According to current BTS/SIGN guidelines, what is the most appropriate management strategy?

A. Prescribe salbutamol inhaler via spacer to use as needed during symptomatic episodes only (Correct Answer)
B. Commence regular inhaled corticosteroid (beclometasone 100 micrograms twice daily) as preventer therapy
C. Prescribe salbutamol inhaler for acute symptoms and add leukotriene receptor antagonist as regular preventer
D. Prescribe salbutamol inhaler and commence regular low-dose inhaled corticosteroid during viral illnesses only
E. Commence regular preventer therapy with long-acting beta-2 agonist plus inhaled corticosteroid combination inhaler

Explanation: ***Prescribe salbutamol inhaler via spacer to use as needed during symptomatic episodes only*** - The child presents with **episodic viral wheeze**, characterized by symptoms occurring only during viral infections and being **completely asymptomatic** between episodes. - According to **BTS/SIGN guidelines**, the first-line management for episodic viral wheeze is a **short-acting beta-2 agonist (SABA)** used only when symptomatic. *Commence regular inhaled corticosteroid (beclometasone 100 micrograms twice daily) as preventer therapy* - **Inhaled corticosteroids (ICS)** are indicated for **multi-trigger wheeze** or asthma, where symptoms occur between viral infections (e.g., during exercise or at night). - Regular ICS provides **no significant benefit** in children with purely episodic viral wheeze who have no interval symptoms. *Prescribe salbutamol inhaler for acute symptoms and add leukotriene receptor antagonist as regular preventer* - **Leukotriene receptor antagonists (LTRAs)** are generally reserved as a second-line option if SABA alone fails to control symptoms in episodic viral wheeze. - This child’s episodes are relatively infrequent (every 6-8 weeks) and non-severe, making **regular preventer** therapy unnecessary at this stage. *Prescribe salbutamol inhaler and commence regular low-dose inhaled corticosteroid during viral illnesses only* - **Intermittent use of ICS** solely during viral illnesses is not the standard recommendation for managing episodic viral wheeze in this age group. - Starting and stopping ICS frequently lacks a strong evidence base for improving outcomes compared to **as-needed SABA therapy**. *Commence regular preventer therapy with long-acting beta-2 agonist plus inhaled corticosteroid combination inhaler* - **Combination inhalers (ICS/LABA)** are used in older children with persistent asthma that is poorly controlled on moderate doses of ICS alone. - **Long-acting beta-2 agonists (LABA)** are contraindicated as monotherapy and are inappropriate for a child with infrequent, infection-triggered symptoms.

Question 51: A 14-month-old child presents to the emergency department following a brief generalised tonic-clonic seizure at home lasting 3 minutes. The parents report she has had fever to 39.5°C for the past 8 hours. The seizure stopped spontaneously before arrival. On examination, she is now alert and interactive with temperature 38.8°C following paracetamol. She has erythematous tonsils with white exudate but no other focal signs. Neurological examination is normal. This is her first seizure. What is the most appropriate immediate management after initial assessment and stabilisation?

A. Arrange urgent CT head to exclude intracranial pathology and then perform lumbar puncture
B. Examine for source of fever, treat the underlying infection, provide parental education about febrile seizures, and safety-netting advice (Correct Answer)
C. Commence prophylactic anticonvulsant therapy with sodium valproate and arrange paediatric neurology follow-up
D. Perform septic screen including lumbar puncture to exclude meningitis given seizure and fever
E. Admit for 24-hour observation, perform EEG, and commence antibiotics pending blood culture results

Explanation: ***Examine for source of fever, treat the underlying infection, provide parental education about febrile seizures, and safety-netting advice*** - The child's presentation, including age (14 months), **generalized tonic-clonic seizure** lasting 3 minutes, fever, and rapid return to normal neurological state, is characteristic of a **simple febrile seizure**. - Management involves identifying and treating the source of fever (tonsillitis in this case), providing **reassurance** and comprehensive **parental education** about the benign nature of febrile seizures, and safety-netting advice for future episodes. *Arrange urgent CT head to exclude intracranial pathology and then perform lumbar puncture* - Neuroimaging like a **CT head** is not indicated in **simple febrile seizures** where the child is neurologically normal post-ictally and has no signs of raised intracranial pressure or focal deficits. - A **lumbar puncture** is not routinely recommended for simple febrile seizures, especially when the child is alert, interactive, and has a clear extracranial source of infection, as the risk of meningitis is low. *Commence prophylactic anticonvulsant therapy with sodium valproate and arrange paediatric neurology follow-up* - **Prophylactic anticonvulsants** are not recommended for febrile seizures due to the significant risk of side effects outweighing the benefits for a condition with a benign prognosis and minimal risk of epilepsy. - Routine **paediatric neurology follow-up** is not required for a first-time simple febrile seizure as it does not indicate an increased risk of developing epilepsy compared to the general population. *Perform septic screen including lumbar puncture to exclude meningitis given seizure and fever* - A full **septic screen** and **lumbar puncture** are usually reserved for children who appear toxically unwell, have meningeal signs, or when no obvious source of fever is identified. - In this case, the child is alert, interactive, has normal neurological examination, and a clear source of infection (exudative tonsillitis), making meningitis an unlikely diagnosis. *Admit for 24-hour observation, perform EEG, and commence antibiotics pending blood culture results* - An **EEG** is not recommended for simple febrile seizures as it does not predict the recurrence of seizures or the future development of epilepsy. - Admission for 24-hour observation and empiric **antibiotics** are generally not necessary for a stable child with a simple febrile seizure and a clear, treatable source of fever, such as tonsillitis, which is often viral or can be managed without immediate IV antibiotics.

Question 52: A 6-year-old girl with known asthma presents to the emergency department with an acute exacerbation. She has received three back-to-back salbutamol nebulisers (5mg each at 20-minute intervals) with ipratropium bromide and oral prednisolone 30mg. One hour after the last nebuliser, she remains distressed with respiratory rate 40/min, heart rate 140 bpm, oxygen saturation 90% on 15L oxygen via non-rebreathe mask, and peak flow remains at 40% predicted. She is using accessory muscles and can only speak in short phrases. According to BTS/SIGN guidelines, what is the most appropriate next pharmacological intervention?

A. Commence intravenous salbutamol infusion at 5 micrograms/kg/minute
B. Give further nebulised salbutamol continuously via oxygen and repeat ipratropium bromide
C. Administer subcutaneous adrenaline 10 micrograms/kg and call anaesthetic team urgently
D. Administer intravenous magnesium sulphate 40 mg/kg over 20 minutes (Correct Answer)
E. Administer intravenous aminophylline 5 mg/kg loading dose over 20 minutes

Explanation: ***Administer intravenous magnesium sulphate 40 mg/kg over 20 minutes***- This patient has **severe/life-threatening asthma** (low saturation, persistent respiratory distress, and poor peak flow) that has failed to improve after initial **nebulized bronchodilators** and **steroids**.- According to **BTS/SIGN guidelines**, **IV Magnesium Sulphate** is the recommended first-line second-line pharmacological intervention for children with acute asthma who do not respond to initial therapy.*Commence intravenous salbutamol infusion at 5 micrograms/kg/minute*- **IV Salbutamol** is typically considered after a trial of **IV Magnesium Sulphate** or in patients who continue to deteriorate despite second-line therapy.- The starting dose for an infusion is usually lower (e.g., 1-2 mcg/kg/min), while 5 mcg/kg/min is often used as a bolus dose in specific protocols; it is not the immediate first choice here.*Give further nebulised salbutamol continuously via oxygen and repeat ipratropium bromide*- While **continuous nebulization** is an option, this patient exhibits **life-threatening features** (SpO2 90% on high-flow oxygen), requiring more aggressive escalated treatment with **intravenous medications**.- Relying solely on inhaled therapy at this stage may delay essential systemic treatment for someone with poor **air entry** or exhausting effort.*Administer subcutaneous adrenaline 10 micrograms/kg and call anaesthetic team urgently*- **Adrenaline** is the mainstay for **anaphylaxis**, but it is not a routine part of the BTS/SIGN asthma management algorithm unless the airway is lost or in specific arrest scenarios.- While calling the **anesthetic/PICU team** is appropriate due to severity, the next specific pharmacological step in the asthma pathway is magnesium, not subcutaneous adrenaline.*Administer intravenous aminophylline 5 mg/kg loading dose over 20 minutes*- **Aminophylline** is generally reserved as a later option for children who are unresponsive to **IV Magnesium** and **IV Salbutamol** due to its narrow therapeutic index.- It requires **cardiac monitoring** and levels checking, making it less preferred as an initial IV intervention compared to the safer profile of **Magnesium Sulphate**.

Question 53: An 18-month-old child with recurrent viral-induced wheeze is brought to the emergency department with increased work of breathing following 2 days of coryzal symptoms. On examination, she has moderate subcostal recession, respiratory rate 48/min, heart rate 140 bpm, oxygen saturation 94% on air, and widespread expiratory wheeze. She received salbutamol via spacer 2 hours ago at home with minimal improvement. What distinguishes this presentation from bronchiolitis and supports a diagnosis of viral-induced wheeze?

A. The presence of previous similar episodes and response to bronchodilator therapy (Correct Answer)
B. The age of the child being over 12 months at presentation
C. The absence of fine inspiratory crackles on chest auscultation
D. The history of coryzal prodrome preceding respiratory symptoms
E. The presence of family history of atopy or asthma

Explanation: ***The presence of previous similar episodes and response to bronchodilator therapy***- **Recurrent episodes** of wheezing associated with viral infections are a hallmark of viral-induced wheeze, distinguishing it from bronchiolitis, which is typically a child's first or second episode.- A **response to bronchodilators**, even if partial, is characteristic of viral-induced wheeze, while bronchiolitis is generally unresponsive to these medications.*The age of the child being over 12 months at presentation*- While **bronchiolitis** commonly affects infants under 12 months, it can occur in children up to **24 months of age**.- Therefore, age alone in this range is not a definitive differentiator between the two conditions.*The absence of fine inspiratory crackles on chest auscultation*- **Fine inspiratory crackles** are a common finding in bronchiolitis, along with wheezing, whereas viral-induced wheeze often presents predominantly with **expiratory wheeze**.- However, auscultatory findings can overlap, and the absence of crackles is less specific than the history of recurrence or bronchodilator response for differentiation.*The history of coryzal prodrome preceding respiratory symptoms*- A **coryzal prodrome** (runny nose, cough, low-grade fever) is a typical precursor to both **bronchiolitis** and **viral-induced wheeze**.- Since this feature is common to both conditions, it does not serve as a distinguishing factor.*The presence of family history of atopy or asthma*- A **family history of atopy or asthma** is a risk factor for developing viral-induced wheeze and later asthma, indicating a predisposition.- However, its presence does not definitively differentiate an acute episode from bronchiolitis, as it's a predisposing factor rather than a specific diagnostic criterion for the current illness.

Question 54: A 2-year-old boy is brought to the emergency department with a 24-hour history of fever to 38.8°C, pulling at his right ear, and being more clingy than usual. He has had coryzal symptoms for 3 days. Examination reveals a red, bulging right tympanic membrane with loss of light reflex. He is otherwise well with no respiratory distress. His observations show: heart rate 130 bpm, respiratory rate 30/min, temperature 38.6°C, and oxygen saturation 98% on air. There is no mastoid tenderness or swelling. What is the most appropriate management?

A. Prescribe amoxicillin for 5 days and advise regular paracetamol for pain relief
B. Advise regular analgesia with paracetamol or ibuprofen, provide safety-netting advice, and review in 48-72 hours if not improving (Correct Answer)
C. Prescribe co-amoxiclav for 7 days given the severity of bulging tympanic membrane
D. Prescribe amoxicillin for 5 days and arrange follow-up with audiology in 6 weeks
E. Take ear swab for microscopy and culture, prescribe topical antibiotics, and arrange ENT review

Explanation: ***Advise regular analgesia with paracetamol or ibuprofen, provide safety-netting advice, and review in 48-72 hours if not improving***- In children over 2 years with **unilateral acute otitis media (AOM)** who are systemically well, **NICE guidelines** recommend a watchful waiting approach as most cases are self-limiting.- Management focuses on **pain relief** with analgesia and providing clear **safety-netting advice** regarding worsening symptoms or lack of improvement.*Prescribe amoxicillin for 5 days and advise regular paracetamol for pain relief*- Immediate antibiotics are not indicated here because the child is **systemically well**, over 2 years old, and has **unilateral** disease without otorrhoea.- Routine use of **amoxicillin** for uncomplicated AOM contributes to antibiotic resistance and typically only provides a marginal reduction in symptom duration.*Prescribe co-amoxiclav for 7 days given the severity of bulging tympanic membrane*- **Co-amoxiclav** is not first-line for AOM; it is generally reserved for second-line treatment if symptoms fail to respond to amoxicillin.- A **bulging tympanic membrane** is a classic diagnostic feature of AOM but does not, on its own, mandate immediate broad-spectrum antibiotic therapy.*Prescribe amoxicillin for 5 days and arrange follow-up with audiology in 6 weeks*- Immediate antibiotics are inappropriate for this stable child, and **audiology follow-up** is not routinely required after a single acute episode of uncomplicated AOM.- Audiology referral is typically reserved for children with persistent **Otitis Media with Effusion (OME)** or significant hearing concerns following resolution of the acute infection.*Take ear swab for microscopy and culture, prescribe topical antibiotics, and arrange ENT review*- **Ear swabs** and **topical antibiotics** are treatments for **Otitis Externa**, not for AOM where the infection is located behind an intact tympanic membrane.- An **ENT review** is not indicated for simple AOM unless there are complications like **mastoiditis** or frequently recurrent episodes.

Question 55: A 5-year-old boy with asthma is currently managed on beclometasone 400 micrograms twice daily via spacer device. He continues to experience wheeze requiring salbutamol 3-4 times per week and has had two courses of oral steroids in the past 6 months for acute exacerbations. His inhaler technique is good and adherence is confirmed by prescription records. According to BTS/SIGN guidelines, what is the most appropriate next step in his asthma management?

A. Add a leukotriene receptor antagonist such as montelukast to current therapy (Correct Answer)
B. Increase inhaled corticosteroid dose to beclometasone 800 micrograms twice daily
C. Add long-acting beta-2 agonist such as salmeterol to current therapy
D. Switch to a combination inhaler containing fluticasone and salmeterol
E. Add regular oral theophylline while maintaining current inhaled therapy

Explanation: ***Add a leukotriene receptor antagonist such as montelukast to current therapy*** - The patient is already on a **paediatric high dose** of inhaled corticosteroids (beclometasone 800 mcg/day) and continues to experience uncontrolled asthma symptoms despite good adherence and technique. - According to **BTS/SIGN guidelines** for children aged 5-12 years, the appropriate next step in this scenario is to add a **leukotriene receptor antagonist (LTRA)** like montelukast to the existing therapy. *Increase inhaled corticosteroid dose to beclometasone 800 micrograms twice daily* - The patient is already receiving **800 micrograms total daily**, which represents a **high dose** for this age group, exceeding the standard moderate dose. - Further increasing the **inhaled corticosteroid (ICS)** dose beyond this point significantly increases the risk of **systemic side effects** such as growth suppression, without a proportional increase in efficacy. *Add long-acting beta-2 agonist such as salmeterol to current therapy* - For children under 12 years, **BTS/SIGN guidelines** recommend adding an **LTRA** as the preferred first-line add-on therapy, rather than a **long-acting beta-2 agonist (LABA)**. - **LABAs** are generally considered after a trial of **LTRA** augmentation if symptoms remain uncontrolled, or as a primary add-on in older children and adults. *Switch to a combination inhaler containing fluticasone and salmeterol* - This option introduces a **long-acting beta-2 agonist (LABA)**, which, as per **BTS/SIGN guidelines**, is not the recommended first add-on for a 5-year-old on high-dose ICS. - Combination inhalers (ICS/LABA) are typically reserved for children who have failed to achieve control with **ICS plus LTRA** therapy. *Add regular oral theophylline while maintaining current inhaled therapy* - **Oral theophylline** is generally reserved as a later-line therapy in asthma management due to its **narrow therapeutic index** and potential for significant **side effects**. - It requires **serum level monitoring** and is typically considered only after other preferred add-on therapies, such as **LTRAs** and **LABAs**, have been tried and failed to achieve adequate control.

Question 56: A 4-month-old infant is brought to the emergency department with a 6-hour history of fever to 39.2°C and reduced feeding. She was born at term with no complications and is up to date with vaccinations. On examination, she appears irritable but consolable, has no rash, fontanelle is flat, cardiovascular and respiratory examinations are normal, and there are no focal signs of infection. Her observations show: heart rate 165 bpm, respiratory rate 45/min, temperature 38.9°C, and capillary refill time 2 seconds centrally. What is the most appropriate management?

A. Perform full septic screen including blood cultures, urine culture, lumbar puncture, and commence intravenous antibiotics (Correct Answer)
B. Obtain blood cultures and urine sample, give intravenous ceftriaxone, and observe for 4 hours before deciding on lumbar puncture
C. Perform blood tests and urine culture, give oral antibiotics if urinary tract infection confirmed, and arrange review in 24 hours
D. Administer paracetamol, provide safety-netting advice, and arrange GP follow-up within 24 hours
E. Obtain blood cultures, commence intravenous antibiotics, and perform lumbar puncture once antibiotics have been administered

Explanation: ***Perform full septic screen including blood cultures, urine culture, lumbar puncture, and commence intravenous antibiotics***- In an infant presenting with **high fever (>39°C)**, irritability, and reduced feeding, a **full septic screen** is essential to exclude serious bacterial infections like **meningitis** and **septicaemia**.- According to **NICE guidelines**, infants with concerning features or those who appear unwell require urgent **lumbar puncture** and empirical **intravenous antibiotics** to prevent rapid clinical deterioration.*Obtain blood cultures and urine sample, give intravenous ceftriaxone, and observe for 4 hours before deciding on lumbar puncture*- Delaying a **lumbar puncture** for observation is unsafe in a febrile, irritable infant, as it may delay the diagnosis of **bacterial meningitis**.- Antibiotics should ideally be administered after the **lumbar puncture** is performed to ensure accurate CSF culture results, unless the child is in **septic shock**.*Perform blood tests and urine culture, give oral antibiotics if urinary tract infection confirmed, and arrange review in 24 hours*- **Oral antibiotics** are insufficient for an infant in this age group showing signs of **systemic illness** such as irritability and high fever.- A **24-hour review** is an inappropriate delay for a child who potentially has a **serious bacterial infection** requiring inpatient management.*Administer paracetamol, provide safety-netting advice, and arrange GP follow-up within 24 hours*- **Safety-netting** alone is inappropriate for an infant with a fever of **39.2°C** and reduced feeding, as these are "red flag" or **high-risk** clinical features.- Using **antipyretics** like paracetamol may mask signs of worsening infection and does not address the underlying **pathogen**.*Obtain blood cultures, commence intravenous antibiotics, and perform lumbar puncture once antibiotics have been administered*- Performing a **lumbar puncture** after antibiotics have been started can **sterilize the CSF**, making it difficult to identify the causative organism and tailor treatment.- Unless the patient is **hemodynamically unstable** or showing signs of raised **intracranial pressure**, the LP should precede the first dose of antibiotics.

Question 57: A 10-year-old girl with known asthma presents to the emergency department with wheeze and breathlessness that started 4 hours ago. She uses her salbutamol inhaler 4-6 times per week and beclometasone 200 micrograms twice daily. On examination, she can speak in full sentences, has mild intercostal recession, respiratory rate 28/min, heart rate 110 bpm, oxygen saturation 96% on air, and peak flow 65% of her best. Chest auscultation reveals widespread polyphonic wheeze. Following administration of nebulised salbutamol, her peak flow improves to 80% predicted and she has no recession. What is the most appropriate next step in management?

A. Discharge home with a 3-day course of oral prednisolone, advice to continue regular preventer, and arrange GP follow-up within 2 days (Correct Answer)
B. Admit for observation overnight with regular salbutamol nebulisers and commence oral prednisolone
C. Discharge immediately with advice to use salbutamol inhaler as needed and return if symptoms worsen
D. Administer ipratropium bromide nebuliser and observe for a further hour before making discharge decision
E. Commence oral prednisolone and observe in the emergency department for 4 hours before reassessment

Explanation: ***Discharge home with a 3-day course of oral prednisolone, advice to continue regular preventer, and arrange GP follow-up within 2 days*** - The patient presented with **moderate acute asthma** (PEFR 65%, able to speak sentences) and demonstrated a **good response** to initial salbutamol, with PEFR improving to 80% and recession resolving. - For a good responder, discharge is appropriate with a short course of **oral corticosteroids** (e.g., prednisolone for 3-5 days) to reduce inflammation and prevent relapse, along with mandatory **GP follow-up within 2 days** to review control and address frequent reliever use. *Admit for observation overnight with regular salbutamol nebulisers and commence oral prednisolone* - **Admission** is not indicated here as the patient demonstrated a **good clinical response** to initial treatment, achieving a PEFR >75% and resolution of mild respiratory distress signs. - Overnight observation and regular nebulisers are typically reserved for patients with **severe acute asthma**, those with a **poor response** to initial treatment, or individuals at high risk of deterioration. *Discharge immediately with advice to use salbutamol inhaler as needed and return if symptoms worsen* - Discharging without a course of **oral corticosteroids** (like prednisolone) is inappropriate, as they are crucial for resolving underlying airway inflammation and preventing **early relapse** after an acute exacerbation. - Safe discharge requires a structured **asthma action plan**, specific advice on regular preventer use, and **scheduled follow-up**, rather than just general advice to return if symptoms worsen. *Administer ipratropium bromide nebuliser and observe for a further hour before making discharge decision* - **Ipratropium bromide** is an anticholinergic bronchodilator usually reserved for **severe or life-threatening asthma exacerbations** or when there is an inadequate response to **beta-agonists** alone. - Since the patient had a **good response** to salbutamol (PEFR 80%, no recession), adding ipratropium bromide is not necessary and would unnecessarily prolong the emergency department stay. *Commence oral prednisolone and observe in the emergency department for 4 hours before reassessment* - While commencing oral prednisolone is correct, a mandatory **4-hour observation** in the emergency department is generally not required for patients who have shown a **good and sustained response** to initial treatment and are clinically stable. - Guidelines suggest that children can be discharged once stable with adequate PEFR and oxygen saturations, and can manage **4-hourly inhaled bronchodilators** at home, indicating prolonged observation after starting steroids isn't routine for well-responding moderate cases.

Question 58: What is the recommended definition of fever in a child under 5 years of age according to NICE guidelines for assessment of febrile illness in children?

A. Temperature of 38°C or above (Correct Answer)
B. Temperature of 37.5°C or above
C. Temperature of 38.5°C or above
D. Temperature of 37.8°C or above measured axillary
E. Temperature more than 1°C above the child's normal baseline

Explanation: ***Temperature of 38°C or above*** - According to **NICE guideline [NG143/CG160]**, fever in children under 5 years is clinically defined as a temperature of **38°C (100.4°F)** or higher. - This threshold is critical for the **Traffic Light System** used to risk-stratify children for serious illness, particularly for infants under 3 months who are considered **high risk (red)** at this level. *Temperature of 37.5°C or above* - While 37.5°C is often considered the upper limit of **normal body temperature**, it does not meet the formal diagnostic criteria for fever according to NICE. - Using this lower threshold would lead to **over-diagnosis** and potentially unnecessary **clinical investigation** for serious bacterial infections. *Temperature of 38.5°C or above* - A temperature of 38.5°C is a significantly high reading but is not the **baseline definition** for the onset of fever according to NICE. - Setting the definition this high would delay the identification of **febrile illness** and potentially miss infants requiring urgent assessment. *Temperature of 37.8°C or above measured axillary* - **Axillary measurements** are recommended for infants and young children, but the numerical threshold for fever remains **38°C** regardless of the site. - NICE specifically advises against using 37.8°C as a definitive cutoff, as it does not align with the validated risk **stratification tools**. *Temperature more than 1°C above the child's normal baseline* - Although a rise from **baseline temperature** indicates a change in health, NICE requires an **absolute numerical value** for standardized assessment. - Subjective parent reports or relative changes are not sufficient to trigger the **fever management pathways** without a documented reading of 38°C.

Question 59: A 3-month-old infant presents with a 2-day history of coryzal symptoms followed by difficulty feeding and increased work of breathing. On examination, she has subcostal and intercostal recession, respiratory rate 65/min, heart rate 155 bpm, oxygen saturation 91% on air, and temperature 37.8°C. Auscultation reveals widespread fine inspiratory crackles and expiratory wheeze. A chest X-ray shows hyperinflation with patchy opacities. What is the most appropriate management approach?

A. Commence nebulised salbutamol, provide supplemental oxygen, and monitor response to treatment
B. Provide supportive care with oxygen therapy, nasogastric feeding if required, and close monitoring (Correct Answer)
C. Administer oral prednisolone, nebulised salbutamol, and arrange admission for observation
D. Commence broad-spectrum intravenous antibiotics and provide supplemental oxygen therapy
E. Administer nebulised 3% hypertonic saline and commence regular salbutamol nebulisers

Explanation: ***Provide supportive care with oxygen therapy, nasogastric feeding if required, and close monitoring***- The clinical presentation of a young infant with **coryzal symptoms**, **respiratory distress** (subcostal/intercostal recession, high respiratory rate), **hypoxia** (O2 sat 91%), and **widespread crackles/wheeze** is highly characteristic of **bronchiolitis**, typically caused by **RSV**.- Evidence-based management for bronchiolitis is primarily **supportive**, focusing on maintaining adequate **oxygen saturations** (target ≥92%) and ensuring sufficient **hydration/nutrition**, often requiring nasogastric feeding, along with close monitoring of respiratory status.*Commence nebulised salbutamol, provide supplemental oxygen, and monitor response to treatment*- Clinical guidelines, such as those from **NICE (NG9)**, specifically recommend against the routine use of **bronchodilators** like salbutamol in infants with bronchiolitis.- The pathophysiology of bronchiolitis involves **airway edema** and mucus plugging, not primarily bronchoconstriction, making beta-agonists generally ineffective.*Administer oral prednisolone, nebulised salbutamol, and arrange admission for observation*- **Systemic corticosteroids** (e.g., prednisolone) have consistently shown no significant clinical benefit in reducing the severity or duration of bronchiolitis in infants.- The use of **salbutamol** is also not recommended for bronchiolitis, as previously stated.*Commence broad-spectrum intravenous antibiotics and provide supplemental oxygen therapy*- Bronchiolitis is a **viral infection**, making **antibiotics** ineffective and generally not indicated unless there is strong evidence of a secondary bacterial infection (e.g., specific signs of bacterial pneumonia or sepsis).- The fever (37.8°C) is low-grade and the CXR findings of **hyperinflation** with patchy opacities are typical for viral bronchiolitis, not necessarily indicative of bacterial pneumonia requiring empiric IV antibiotics.*Administer nebulised 3% hypertonic saline and commence regular salbutamol nebulisers*- While **hypertonic saline** has been investigated and may show some limited benefit in reducing hospital stay in certain cases, it is not a universally recommended first-line emergency treatment in standard guidelines.- Combining it with regular **salbutamol** is not supported by evidence for bronchiolitis and does not address the core supportive needs like oxygen and feeding.

Question 60: A 20-month-old girl presents with a 5-day history of fever ranging from 38.5°C to 40.1°C. She has been irritable but has no focal symptoms. Examination reveals bilateral non-exudative conjunctival injection, erythematous cracked lips, cervical lymphadenopathy with nodes measuring 2cm, and a polymorphous rash on the trunk. Her hands and feet appear oedematous. Blood results show: Hb 105 g/L, WCC 16.8 × 10⁹/L, platelets 485 × 10⁹/L, CRP 128 mg/L, ESR 72 mm/hr. What is the most appropriate initial management?

A. Arrange urgent echocardiography and commence intravenous immunoglobulin and high-dose aspirin (Correct Answer)
B. Commence broad-spectrum intravenous antibiotics after blood cultures and perform lumbar puncture
C. Administer oral prednisolone and arrange outpatient rheumatology follow-up within one week
D. Perform viral throat swab, commence supportive treatment, and arrange follow-up in 48 hours
E. Administer intravenous ceftriaxone and arrange urgent ophthalmology review for uveitis screening

Explanation: ***Arrange urgent echocardiography and commence intravenous immunoglobulin and high-dose aspirin*** - The patient's presentation with persistent fever, bilateral non-exudative conjunctival injection, erythematous cracked lips, cervical lymphadenopathy, polymorphous rash, and oedematous extremities fulfills the diagnostic criteria for **Kawasaki disease**. - **Intravenous immunoglobulin (IVIG)** is crucial to reduce the risk of **coronary artery aneurysms**, and **high-dose aspirin** is used for its anti-inflammatory effects in the acute phase, alongside an **echocardiogram** to assess cardiac involvement. *Commence broad-spectrum intravenous antibiotics after blood cultures and perform lumbar puncture* - This approach is geared towards severe bacterial infections like **sepsis** or **meningitis**, which is less consistent with the specific mucocutaneous findings and extremity changes seen in this child. - Delaying specific treatment for Kawasaki disease, such as **IVIG**, significantly increases the risk of **coronary artery complications**. *Administer oral prednisolone and arrange outpatient rheumatology follow-up within one week* - While **corticosteroids** may be used in IVIG-refractory Kawasaki disease or in conjunction with IVIG in high-risk cases, they are not the primary initial monotherapy. - **Outpatient follow-up** is inadequate for acute Kawasaki disease, which requires urgent inpatient management due to the risk of acute cardiac complications like **myocardial infarction**. *Perform viral throat swab, commence supportive treatment, and arrange follow-up in 48 hours* - The constellation of symptoms, significantly elevated **inflammatory markers (CRP, ESR)**, and **thrombocytosis** strongly indicates a systemic inflammatory process, not a benign viral illness amenable to supportive care and delayed follow-up. - This approach would miss the critical window for intervention, leading to potential irreversible **coronary artery damage**. *Administer intravenous ceftriaxone and arrange urgent ophthalmology review for uveitis screening* - **Ceftriaxone** is an antibiotic and is ineffective for the inflammatory vasculitis of Kawasaki disease. - While **uveitis** can be a feature, the primary life-threatening complication in Kawasaki disease is **coronary artery involvement**, making a general ophthalmology review not the most urgent or appropriate initial step in management.

Question 61: A 7-year-old boy with known asthma is brought to the emergency department by ambulance. He is sitting forward, using accessory muscles, and speaking in single words. His observations show: heart rate 145 bpm, respiratory rate 38/min, oxygen saturation 89% on air, and peak expiratory flow rate 35% of predicted. Auscultation reveals silent chest bilaterally. What is the most appropriate immediate management?

A. Administer high-flow oxygen, nebulised salbutamol and ipratropium, oral prednisolone, and inform senior clinician urgently (Correct Answer)
B. Administer high-flow oxygen, intravenous salbutamol, intravenous aminophylline, and prepare for intubation
C. Administer oxygen to maintain saturations 94-98%, nebulised salbutamol via spacer device, and oral prednisolone
D. Administer intravenous magnesium sulphate, high-flow oxygen, and continuous nebulised salbutamol
E. Obtain urgent arterial blood gas, give high-flow oxygen, and commence intravenous hydrocortisone

Explanation: ***Administer high-flow oxygen, nebulised salbutamol and ipratropium, oral prednisolone, and inform senior clinician urgently*** - The patient exhibits features of **life-threatening asthma**, including a **silent chest**, severe **hypoxia** (SpO2 89%), and inability to speak in full sentences. - Immediate management for **life-threatening asthma** requires **high-flow oxygen**, dual **nebulised bronchodilators** (salbutamol and ipratropium), systemic **corticosteroids** (oral prednisolone), and urgent **escalation to senior clinicians**. *Administer high-flow oxygen, intravenous salbutamol, intravenous aminophylline, and prepare for intubation* - **Intravenous bronchodilators** and **aminophylline** are typically second-line treatments for patients who are refractory to initial **nebulised therapy**, not the immediate first-line choice. - While critical, **intubation** is a last resort; the immediate priority is aggressive medical management to improve respiratory function and avoid mechanical ventilation. *Administer oxygen to maintain saturations 94-98%, nebulised salbutamol via spacer device, and oral prednisolone* - Maintaining saturations 94-98% is too conservative for a patient with **life-threatening asthma** and severe hypoxia (SpO2 89%); **high-flow oxygen** is needed to achieve higher saturations quickly. - A **spacer device** is inappropriate for **life-threatening asthma**; oxygen-driven **nebulisers** are required to deliver high-dose bronchodilators effectively in this severe presentation. *Administer intravenous magnesium sulphate, high-flow oxygen, and continuous nebulised salbutamol* - **Intravenous magnesium sulphate** is an important adjunct for severe cases but is usually considered after initial dual **nebulised bronchodilators** and **steroids** have been given. - This option misses the crucial addition of **ipratropium bromide** alongside salbutamol, which is a standard component of initial management for **life-threatening asthma**, and the systemic **corticosteroids**. *Obtain urgent arterial blood gas, give high-flow oxygen, and commence intravenous hydrocortisone* - An **arterial blood gas (ABG)** is an invasive and painful procedure that can cause distress and worsen bronchospasm; it should **not delay** the immediate administration of life-saving medical treatment. - While **high-flow oxygen** and systemic **corticosteroids** are appropriate, this option crucially omits the immediate and essential administration of **nebulised bronchodilators** to relieve severe airway obstruction.

Question 62: A 6-year-old girl with known asthma on beclometasone 200 micrograms twice daily presents to the emergency department with acute breathlessness following exposure to a cat at a friend's house. She is speaking in words only, has a respiratory rate of 40 breaths per minute, heart rate of 135 beats per minute, and oxygen saturation of 90% on room air. There is widespread wheeze with good air entry. She has received 3 doses of back-to-back nebulised salbutamol with ipratropium bromide, high-flow oxygen, and oral prednisolone 30 mg. After 1 hour, her oxygen saturation has improved to 95% on 6 litres oxygen, respiratory rate is 32, and she can speak in short sentences. What is the most appropriate next management step?

A. Discharge home with increased inhaled corticosteroid dose
B. Continue hourly nebulised salbutamol and reassess
C. Admit for observation with regular inhaled bronchodilators (Correct Answer)
D. Administer intravenous magnesium sulphate
E. Arrange urgent PICU review

Explanation: ***Admit for observation with regular inhaled bronchodilators*** - The patient initially presented with **severe acute asthma** (SpO2 90% on room air, speaking in words only) and, while improving, still requires **supplemental oxygen** (95% on 6L O2) and remains symptomatic (RR 32, speaking in short sentences), necessitating inpatient monitoring. - BTS/SIGN guidelines for acute asthma in children suggest admission for those who require **oxygen therapy** to maintain saturation or fail to achieve a sustained response to initial emergency department treatment, or have significant ongoing symptoms. *Discharge home with increased inhaled corticosteroid dose* - Discharge is inappropriate as the patient still requires **supplemental oxygen** (6L O2) and has not achieved stability (e.g., SpO2 ">="94% on room air) and resolution of significant symptoms. - A child should only be considered for discharge once they are stable on **4-hourly inhaled bronchodilators**, have no clinical signs of respiratory distress, and are maintaining adequate oxygen saturation on **room air**. *Continue hourly nebulised salbutamol and reassess* - While the patient showed initial improvement with back-to-back nebulizers, continuing hourly nebulised salbutamol without a structured inpatient plan indicates ongoing severe disease and is not a definitive next step for a patient showing partial improvement. - For a patient who has partially improved but still requires oxygen and has persistent symptoms, the focus shifts to a period of observation with **regular (e.g., 4-hourly) bronchodilators** rather than just repeating hourly doses indefinitely in the ED. *Administer intravenous magnesium sulphate* - **Intravenous magnesium sulphate** is typically reserved for children with **life-threatening asthma** or those with **severe acute asthma** who show an inadequate response to initial bronchodilator and steroid therapy. - This patient is showing significant clinical improvement (SpO2 95% on 6L O2, speaking in sentences, reduced RR), so advancing to **IV magnesium** is not currently indicated. *Arrange urgent PICU review* - **PICU review** is indicated for patients with **life-threatening features** (e.g., silent chest, exhaustion, hypotension, rapidly deteriorating despite maximal therapy) or those who are unresponsive to treatment. - This child is clinically improving, and while not fully recovered, her current status does not meet the criteria for **life-threatening asthma** requiring intensive care at this stage.

Question 63: A 14-month-old child presents with a 24-hour history of fever to 38.7°C and increasing irritability. The parents report the child has been pulling at their right ear. On examination, the child is alert but distressed. Temperature is 38.5°C, heart rate is 135 beats per minute, respiratory rate is 32 breaths per minute, and capillary refill time is less than 2 seconds. Otoscopy of the right ear reveals a bulging, erythematous tympanic membrane with loss of normal landmarks. The left ear appears normal. What is the most appropriate initial management?

A. Prescribe immediate antibiotic therapy with amoxicillin
B. Advise watchful waiting with regular paracetamol and review if symptoms worsen
C. Prescribe delayed antibiotic prescription to be used if no improvement in 48-72 hours (Correct Answer)
D. Refer urgently to ENT for myringotomy
E. Prescribe topical antibiotic ear drops

Explanation: ***Prescribe delayed antibiotic prescription to be used if no improvement in 48-72 hours*** - In a child older than 6 months with **unilateral acute otitis media (AOM)** and no otorrhoea, a **back-up (delayed) antibiotic** strategy is recommended to reduce unnecessary antimicrobial use. - Most cases of AOM are self-limiting; the delayed prescription serves as a **safety net** if symptoms fail to improve or worsen after the initial 2-3 days. *Prescribe immediate antibiotic therapy with amoxicillin* - Immediate antibiotics are typically reserved for children under 2 years with **bilateral AOM**, those with **systemic distress**, or children presenting with **otorrhoea**. - This child presents with unilateral disease and is **systemically well**, making immediate therapy unnecessary as the first-line approach. *Advise watchful waiting with regular paracetamol and review if symptoms worsen* - While **analgesia** is essential for managing pain (distress and ear pulling), a pure 'no antibiotic' strategy may be less suitable for a child **under 2 years** than a delayed prescription. - NICE guidelines favor providing a **contingency plan** (delayed script) for younger children to ensure they receive treatment if natural resolution does not occur. *Refer urgently to ENT for myringotomy* - **Myringotomy** is a surgical procedure reserved for complications such as **mastoiditis**, facial nerve palsy, or recurrent refractory cases. - It is not indicated for an initial presentation of **uncomplicated acute otitis media** in a stable child. *Prescribe topical antibiotic ear drops* - **Topical antibiotics** are ineffective for AOM because the infection is localized behind an **intact tympanic membrane** where drops cannot reach. - Topical therapy is only indicated if there is a **perforation** with discharge (Chronic Suppurative Otitis Media) or for Otitis Externa.

Question 64: A 4-year-old boy presents to the emergency department with sudden onset high fever of 39.8°C, drooling, and difficulty swallowing. He is sitting upright, leaning forward, and appears anxious. He has inspiratory stridor and muffled voice. The parents report symptoms started approximately 4 hours ago and have rapidly worsened. His immunization record shows he received only the first set of vaccinations at 2 months of age. What is the most appropriate immediate management?

A. Urgent laryngoscopy to visualize the airway
B. Immediate administration of nebulised adrenaline
C. Contact senior anaesthetist and ENT surgeon immediately without disturbing the child (Correct Answer)
D. Administer intramuscular dexamethasone
E. Obtain lateral neck radiograph in radiology department

Explanation: ***Contact senior anaesthetist and ENT surgeon immediately without disturbing the child***- The clinical presentation of **high fever**, **drooling**, **difficulty swallowing**, **inspiratory stridor**, muffled voice, and **tripod positioning** in an unimmunized child strongly suggests **acute epiglottitis**, a **life-threatening airway emergency**.- The immediate priority is to **avoid distressing the child** (which could precipitate complete airway obstruction) and to ensure **expert airway management** by senior specialists (anaesthetist for intubation, ENT for tracheostomy) in a controlled environment.*Urgent laryngoscopy to visualize the airway*- Attempting to visualize the airway in an awake, distressed child with suspected epiglottitis is extremely dangerous as it can trigger **laryngospasm** and immediate **total airway obstruction**.- Any airway examination should only be performed by experienced personnel in a **controlled setting** like an operating theatre, with full resuscitation and surgical airway equipment readily available.*Immediate administration of nebulised adrenaline*- **Nebulised adrenaline** is the standard treatment for **Croup** (laryngotracheobronchitis) to reduce subglottic edema, but it is not effective for the supraglottic swelling characteristic of epiglottitis.- Administering an ineffective treatment for epiglottitis can lead to dangerous delays in securing the airway, significantly increasing the risk of **respiratory arrest**.*Administer intramuscular dexamethasone*- **Dexamethasone** is used to reduce inflammation in various respiratory conditions, including croup, but its **onset of action is too slow** to manage the acute, immediate airway compromise seen in epiglottitis.- While corticosteroids may play a secondary role later, the **immediate priority** is to **secure the airway**; pharmacological interventions should not delay this critical step or the involvement of senior specialists.*Obtain lateral neck radiograph in radiology department*- Transporting a child with highly suspected epiglottitis to a **radiology department** carries a significant risk of **airway collapse** en route, away from necessary resuscitation equipment and experienced medical staff.- While a **'thumb sign'** may be seen on a lateral neck X-ray, the diagnosis of epiglottitis is primarily **clinical**, and confirming it radiologically is secondary to ensuring immediate and definitive airway management.

Question 65: A 12-year-old boy with poorly controlled asthma is currently on fluticasone 500 micrograms twice daily via metered dose inhaler and spacer, plus salbutamol as needed. He experiences symptoms requiring salbutamol 4-5 times per week and wakes at night with cough approximately twice per month. His inhaler technique is good and adherence is confirmed. According to BTS/SIGN guidelines, what is the most appropriate next step to optimize his asthma management?

A. Add long-acting muscarinic antagonist (LAMA) such as tiotropium
B. Add long-acting beta-agonist (LABA) such as salmeterol (Correct Answer)
C. Add leukotriene receptor antagonist (LTRA) such as montelukast
D. Increase inhaled corticosteroid to fluticasone 1000 micrograms twice daily
E. Add oral theophylline

Explanation: ***Add long-acting beta-agonist (LABA) such as salmeterol***- For children aged **12 and over**, BTS/SIGN guidelines follow the adult pathway, where **Step 3** involves adding a **LABA** to an inhaled corticosteroid (ICS) to manage persistent symptoms.- This patient remains symptomatic (night waking and frequent SABA use) on **moderate-dose ICS**, making the addition of a LABA the most effective next step to improve clinical control.*Add long-acting muscarinic antagonist (LAMA) such as tiotropium*- **LAMA** therapy is generally reserved for **Step 4** (persistent poor control) if the combination of ICS and LABA is insufficient.- It is not the preferred first-line add-on therapy for a patient currently only on **ICS monotherapy**.*Add leukotriene receptor antagonist (LTRA) such as montelukast*- Although **LTRAs** are added at Step 3 for children aged **5-11**, the pathway for those **12 and older** prioritizes LABA as the initial add-on.- LTRA would typically be considered if **LABA treatment fails** or if there is a specific clinical preference, but it is not the primary recommendation here.*Increase inhaled corticosteroid to fluticasone 1000 micrograms twice daily*- Increasing the **ICS dose** beyond a moderate level is generally less effective for symptom control than adding a **LABA**.- High doses of ICS (e.g., 2000 mcg/day total) increase the risk of systemic side effects without offering the **bronchodilatory benefits** of a LABA.*Add oral theophylline*- **Theophylline** is considered a fourth-line option or later due its narrow **therapeutic index** and significant side-effect profile.- It requires blood level **monitoring** and is only indicated when more effective therapies like LABAs have been optimized.

Question 66: A 10-month-old infant born at 28 weeks gestation with chronic lung disease of prematurity presents with a 3-day history of worsening cough, increased work of breathing, and reduced feeding. Temperature is 37.4°C, respiratory rate is 70 breaths per minute, heart rate is 165 beats per minute, and oxygen saturation is 88% on room air. On examination, there is severe subcostal and intercostal recession, nasal flaring, bilateral fine crackles, and expiratory wheeze. The infant appears tired. What is the most concerning clinical feature indicating need for urgent intervention?

A. History of chronic lung disease of prematurity
B. Respiratory rate of 70 breaths per minute
C. Oxygen saturation of 88% on room air
D. Appearance of tiredness with severe recession (Correct Answer)
E. Bilateral fine crackles and wheeze

Explanation: ***Appearance of tiredness with severe recession*** - An infant who appears **tired** or **exhausted** while demonstrating severe respiratory effort (recession) is showing signs of **impending respiratory failure** and muscle fatigue. - This is a pre-terminal clinical feature that necessitates immediate senior review and potential **Paediatric Intensive Care (PICU)** involvement for mechanical ventilation or advanced support. *History of chronic lung disease of prematurity* - While this provides critical context and identifies the infant as **high risk** for severe bronchiolitis, it is a background risk factor rather than a dynamic clinical sign. - It helps predict a potentially severe course but is not as immediately alarming as the physical sign of **respiratory exhaustion**. *Respiratory rate of 70 breaths per minute* - **Tachypnoea** is a standard feature of acute bronchiolitis and reflects increased work of breathing in response to **bronchiolar obstruction**. - Although 70 bpm is high, it is a marker of compensation; the transition to **exhaustion** (appearing tired) is a more critical indicator of failing compensation. *Oxygen saturation of 88% on room air* - This level of **hypoxia** is concerning and typically warrants **supplemental oxygen** therapy according to guidelines. - Hypoxia can often be corrected with low-flow oxygen, whereas **exhaustion** indicates the mechanical failure of the respiratory pump, which is more difficult to manage. *Bilateral fine crackles and wheeze* - These are characteristic physical findings in **bronchiolitis** caused by inflammation, mucus, and airway narrowing. - While they confirm the diagnosis and severity, they do not carry the same urgent **prognostic weight** as the infant's overall level of fatigue and effort.

Question 67: A 2-year-old girl with recurrent viral-induced wheeze is reviewed in the paediatric clinic. Her mother reports that she has episodes of cough and wheeze approximately every 6-8 weeks, usually triggered by colds. Between episodes she is completely well with no symptoms. Episodes typically last 5-7 days and respond to salbutamol inhaler. She has had 4 episodes requiring healthcare assessment in the past year but no hospital admissions. There is no family history of atopy. What is the most appropriate management plan?

A. Commence regular low-dose inhaled corticosteroid (beclometasone 100 micrograms twice daily)
B. Continue as-needed salbutamol and provide parent-initiated oral prednisolone for acute episodes (Correct Answer)
C. Commence regular montelukast
D. Continue as-needed salbutamol only with safety-netting advice
E. Commence regular long-acting beta-agonist (salmeterol) with salbutamol as needed

Explanation: ***Continue as-needed salbutamol and provide parent-initiated oral prednisolone for acute episodes*** - This child presents with **episodic viral wheeze**, characterized by wheezing episodes strictly triggered by viruses with an **asymptomatic interval** between episodes. - For children with frequent (e.g., >3 in 12 months) or severe episodes requiring healthcare visits, providing **parent-initiated oral prednisolone** for acute episodes can reduce their severity and the need for further medical assessment. *Commence regular low-dose inhaled corticosteroid (beclometasone 100 micrograms twice daily)* - **Inhaled corticosteroids (ICS)** are generally ineffective for **pure episodic viral wheeze** as there is no underlying persistent airway inflammation between viral infections. - ICS are primarily indicated for **multitrigger wheeze** or asthma, where symptoms like nocturnal cough or exercise-induced wheeze occur even in the absence of viral infections. *Commence regular montelukast* - While **leukotriene receptor antagonists (LTRAs)** like montelukast can be considered for viral-induced wheeze, they are typically used if there are features of **atopy** or if simpler measures like acute oral steroids are not sufficient. - Given the child's frequent healthcare visits, initiating **oral steroids** for acute exacerbations is a more targeted and effective approach for immediate symptom control and reducing disease burden. *Continue as-needed salbutamol only with safety-netting advice* - Maintaining **as-needed salbutamol** alone is suitable for infrequent, mild episodes of viral-induced wheeze. - However, this child's history of **four healthcare assessments** in the past year indicates that this management strategy is insufficient and requires **escalation** to prevent future severe episodes. *Commence regular long-acting beta-agonist (salmeterol) with salbutamol as needed* - **Long-acting beta-agonists (LABA)** such as salmeterol are not indicated for **episodic viral wheeze** and should never be used as monotherapy in children. - LABAs are part of the **stepwise management of asthma** and are typically added to a regimen that already includes inhaled corticosteroids, not as a standalone treatment for viral-induced wheeze.

Question 68: An 8-month-old infant is brought to the emergency department with a 6-hour history of fever to 39.1°C and one episode of vomiting. The infant appears unwell, with poor eye contact and weak cry. Temperature is 38.9°C, heart rate is 170 beats per minute, respiratory rate is 45 breaths per minute, capillary refill time is 3 seconds, and blood pressure is 75/40 mmHg. On examination, the anterior fontanelle is slightly full. There is no rash or respiratory distress. Blood tests show white cell count 18.2 × 10⁹/L with neutrophilia, CRP 87 mg/L. Which investigation should be performed immediately before starting empirical antibiotic therapy?

A. Blood cultures followed by lumbar puncture (Correct Answer)
B. Urine microscopy and culture via clean catch method
C. CT head to exclude intracranial pathology
D. Chest radiograph
E. Rapid antigen test for common viruses

Explanation: ***Blood cultures followed by lumbar puncture*** - This infant presents with **red flags for sepsis** and **meningitis**, including poor eye contact, weak cry, tachycardia, prolonged capillary refill time, low blood pressure, and a **slightly full anterior fontanelle**. - **Blood cultures** are vital for identifying systemic pathogens, and a **lumbar puncture** is crucial for diagnosing meningitis, both of which must be performed before starting empirical antibiotics to ensure diagnostic accuracy. *Urine microscopy and culture via clean catch method* - While **urinary tract infection (UTI)** can cause fever, it does not explain the **full fontanelle** or the systemic signs of **shock** observed in this critically unwell infant. - Obtaining a clean catch urine can be time-consuming and would inappropriately delay urgent investigations for more life-threatening conditions like meningitis or sepsis. *CT head to exclude intracranial pathology* - A **CT head** is not typically indicated before a lumbar puncture in an infant without focal neurological deficits or signs of impending brain herniation. - Performing a CT scan would cause a dangerous **delay in the administration of life-saving antibiotics** for suspected bacterial meningitis, which is a medical emergency. *Chest radiograph* - The infant does not present with primary **respiratory symptoms** such as significant cough or focal lung signs to prioritize a chest radiograph. - A **chest X-ray** would not directly aid in diagnosing the immediate life-threatening conditions like **sepsis** or **meningitis** suggested by the clinical presentation. *Rapid antigen test for common viruses* - While viral infections are common, the infant's **toxic appearance**, **neutrophilia**, and **elevated CRP** are highly suggestive of a **serious bacterial infection**, requiring urgent intervention. - A **positive viral test** does not exclude a co-existing **serious bacterial infection (SBI)**, and relying on it would delay critical management for sepsis or meningitis.

Question 69: A 3-year-old boy presents with a 5-day history of persistent fever ranging from 38.8-40.3°C. He has been irritable with reduced appetite but is taking fluids. On examination, he has bilateral non-purulent conjunctival injection, cracked red lips, a polymorphous rash on his trunk, and cervical lymphadenopathy with one node measuring 2 cm. His hands and feet appear erythematous and slightly swollen. Heart sounds are normal with no murmur. Which investigation result would most strongly support the suspected diagnosis?

A. Positive anti-streptolysin O titre
B. Elevated platelet count of 550 × 10⁹/L (Correct Answer)
C. Positive blood cultures for Staphylococcus aureus
D. Elevated serum IgE levels
E. Positive Epstein-Barr virus serology

Explanation: ***Elevated platelet count of 550 × 10⁹/L***- This child meets the clinical criteria for **Kawasaki disease**, presenting with fever for 5 days, **conjunctival injection**, **cracked lips**, **polymorphous rash**, **lymphadenopathy**, and **extremity changes**.- **Thrombocytosis** (platelet count >450 × 10⁹/L) is a classic supportive finding that typically occurs in the **subacute phase** (second week) of the illness.*Positive anti-streptolysin O titre*- This finding indicates a recent **Group A Streptococcus** infection and is associated with **Rheumatic Fever** or **Scarlet Fever**.- While Scarlet Fever presents with a rash and strawberry tongue, it does not typically cause the **non-purulent conjunctivitis** characteristic of Kawasaki disease.*Positive blood cultures for Staphylococcus aureus*- **Staphylococcal Toxic Shock Syndrome** can mimic Kawasaki disease but would usually present with **hypotension** and more rapid clinical deterioration.- Kawasaki disease is an **idiopathic systemic vasculitis**, so blood cultures are characteristically **negative**.*Elevated serum IgE levels*- High IgE levels are typically associated with **atopic conditions** or specific immunodeficiencies like **Job syndrome**.- This lab result does not serve as a diagnostic or supportive marker for the systemic inflammation seen in **Kawasaki disease**.*Positive Epstein-Barr virus serology*- **Infectious mononucleosis** can cause fever, rash, and lymphadenopathy, but it is typically associated with **exudative pharyngitis** and **splenomegaly**.- EBV does not cause the specific **mucocutaneous manifestations** like cracked lips and hand/foot edema seen in this patient.

Question 70: A 6-year-old girl with known asthma presents to the emergency department with an acute severe exacerbation. She has received 3 doses of nebulised salbutamol with ipratropium bromide, high-flow oxygen, and oral prednisolone 40 mg. After 2 hours, her oxygen saturation remains 90% on 15 litres oxygen via non-rebreathe mask, she is exhausted and barely speaking, and has reduced breath sounds bilaterally with minimal wheeze. Peak flow is not recordable. Blood gas shows pH 7.28, pCO2 7.8 kPa, pO2 8.2 kPa, base excess -2. What is the most appropriate management?

A. Administer intravenous magnesium sulphate
B. Commence non-invasive ventilation
C. Arrange urgent transfer to paediatric intensive care unit (Correct Answer)
D. Administer intravenous aminophylline
E. Increase oxygen delivery and continue current management

Explanation: ***Arrange urgent transfer to paediatric intensive care unit***- The patient exhibits clear signs of **impending respiratory failure** or **near-fatal asthma**, including **exhaustion**, **silent chest** (reduced breath sounds with minimal wheeze), and **hypercapnic respiratory acidosis** (pH 7.28, pCO2 7.8 kPa) despite maximal initial therapy.- This critical condition necessitates immediate **advanced respiratory support**, such as **intubation and mechanical ventilation**, which can only be provided in a **Paediatric Intensive Care Unit (PICU)**. *Administer intravenous magnesium sulphate* - While **intravenous magnesium sulphate** is a recognized adjunct treatment for acute severe asthma, it is typically administered earlier when bronchodilator response is suboptimal. - Given the patient's current state of **respiratory exhaustion** and **hypercapnia**, magnesium alone would be insufficient and could delay more definitive interventions. *Commence non-invasive ventilation* - **Non-invasive ventilation (NIV)** is generally **not recommended** for acute severe asthma in children due to the risk of **barotrauma** and potential for delayed intubation in a rapidly deteriorating patient. - In severe asthma with **air trapping** and **respiratory muscle fatigue**, NIV may be ineffective and could exacerbate the patient's condition. *Administer intravenous aminophylline* - **Intravenous aminophylline** is considered a **third-line agent** for severe asthma, with a **narrow therapeutic window** and potential for significant **side effects** like arrhythmias and seizures. - It does not address the immediate need for advanced ventilatory support and its administration would delay necessary PICU transfer. *Increase oxygen delivery and continue current management* - The child is already on maximal oxygen delivery (15 litres via **non-rebreathe mask**), and her persistent hypoxia and rising pCO2 indicate that the current management is **failing**. - Continuing the current ineffective treatment would lead to further deterioration, likely progressing to **respiratory arrest**, given the signs of **exhaustion** and **CO2 retention**.

Question 71: What is the recommended dose of oral prednisolone for the treatment of acute asthma exacerbation in children aged 2-5 years according to current BTS/SIGN guidelines?

A. 10-20 mg once daily for 5 days
B. 10 mg once daily for 3 days
C. 20 mg once daily for 3 days (Correct Answer)
D. 1-2 mg/kg once daily for 3-5 days
E. 0.5 mg/kg twice daily for 3 days

Explanation: ***20 mg once daily for 3 days*** - According to **BTS/SIGN guidelines**, the standard dose for children aged **2-5 years** during an acute asthma exacerbation is **20 mg** of prednisolone. - This dosage is typically administered for a duration of **3 days**, although it can be extended if the patient has not recovered. *10 mg once daily for 3 days* - This lower dose of **10 mg** is the recommendation for children **under 2 years** of age. - Using this dose for a 3-year-old would result in **sub-therapeutic** treatment according to standard national protocols. *1-2 mg/kg once daily for 3-5 days* - While **weight-based dosing** is common in general pediatrics, the **BTS/SIGN guidelines** prioritize simplified **age-based dosing** for acute asthma. - A total dose of **20 mg** is preferred over calculated ranges to ensure rapid and standardized delivery of steroid therapy. *0.5 mg/kg twice daily for 3 days* - Prednisolone is traditionally administered as a **single morning dose** to minimize the risk of **adrenal suppression** and insomnia. - **Twice-daily** regimens are not standard for acute asthma management in the outpatient or emergency setting for this age group. *10-20 mg once daily for 5 days* - The **BTS/SIGN guidelines** specifically state a fixed dose of **20 mg** for the 2-5 age group, rather than a range starting at 10 mg. - While a **5-day course** is acceptable if recovery is slow, the initial guideline recommendation emphasizes a **3-day course** as usually sufficient.

Question 72: A 5-year-old boy with asthma presents to the emergency department with wheeze and breathlessness that started 4 hours ago. He is currently on beclometasone 200 micrograms twice daily via a spacer device. On examination, he can speak in short phrases, respiratory rate is 35 breaths per minute, heart rate is 125 beats per minute, and oxygen saturation is 94% on room air. There is moderate chest wall recession with widespread polyphonic wheeze. His peak expiratory flow is 55% of his predicted best. Which severity classification best describes this acute asthma exacerbation?

A. Moderate acute asthma (Correct Answer)
B. Severe acute asthma
C. Life-threatening asthma
D. Near-fatal asthma
E. Mild acute asthma

Explanation: ***Moderate acute asthma*** - The patient's **peak expiratory flow (PEF) of 55%** of predicted best falls squarely within the 50-75% range for moderate asthma exacerbations. - Clinical signs like being able to **speak in short phrases**, an oxygen saturation of **94%**, and **moderate chest wall recession** are also consistent with a moderate classification. *Severe acute asthma* - Severe asthma would typically present with a **PEF less than 50%** of predicted, or the inability to **speak more than single words** or sentences in one breath. - Although the heart rate (125 bpm) and respiratory rate (35 bpm) are elevated, they do not meet the more stringent criteria for severe asthma in a 5-year-old (e.g., HR >140 bpm or RR >40 bpm). *Life-threatening asthma* - This classification is reserved for patients exhibiting signs of impending respiratory failure, such as a **silent chest**, **cyanosis**, **exhaustion**, **altered consciousness**, or **SpO2 less than 92%**. - The patient's oxygen saturation of 94% and ability to speak in phrases rule out life-threatening asthma. *Near-fatal asthma* - **Near-fatal asthma** is characterized by a raised **pCO2** (indicating respiratory muscle fatigue) and/or requiring **mechanical ventilation**. - The patient is not in acute respiratory failure and does not exhibit these extreme signs, making this diagnosis incorrect. *Mild acute asthma* - Mild asthma exacerbations are usually characterized by **minimal symptoms**, the ability to speak in **full sentences**, and a **PEF greater than 75%** of predicted. - The patient's **moderate chest wall recession** and PEF of 55% indicate a more significant exacerbation than mild.

Question 73: A 4-year-old girl is brought to the GP surgery with a 2-day history of fever up to 39.4°C and coryza. Her mother is concerned as she has been more lethargic than usual. On examination, she is alert and interactive with a temperature of 38.7°C. She has rhinorrhoea, mildly injected pharynx, and mild cervical lymphadenopathy. Heart rate is 115 beats per minute, respiratory rate is 28 breaths per minute, and capillary refill time is less than 2 seconds. There is no rash or photophobia. Which traffic light system category does this child fall into according to NICE guidelines?

A. Green (low risk)
B. Amber (intermediate risk) (Correct Answer)
C. Red (high risk)
D. Green but requires safety-netting advice only
E. Amber requiring immediate blood tests

Explanation: ***Amber (intermediate risk)*** - According to **NICE guidelines**, a child reported by a parent/carer as being **"more lethargic than usual"** or having **decreased activity** falls into the amber risk category. - Despite being alert on examination, the significant **parental concern regarding lethargy** is a crucial intermediate risk indicator that warrants careful assessment. *Green (low risk)* - The child's reported **lethargy** by the mother is an **amber feature**, which means the child cannot be classified as low risk according to NICE guidelines. - Green category children typically exhibit **normal social response** and activity, with no concerning parental reports or clinical signs. *Red (high risk)* - There are no **red flag signs** such as a non-blanching rash, signs of shock (e.g., prolonged capillary refill time, very severe tachypnoea, or significant mottling), or markedly altered consciousness. - The child is **alert and interactive** with a normal capillary refill time, indicating an absence of high-risk features. *Green but requires safety-netting advice only* - While **safety-netting advice** is essential for all children, the presence of the amber feature (lethargy) means this child requires more than just standard safety-netting alone and needs a higher level of assessment. - A child in the green category would have no amber or red features, making home management with only safety-netting appropriate. *Amber requiring immediate blood tests* - Although the child is in the **Amber category**, NICE guidelines do not mandate **immediate blood tests** for every child in this group, especially if a likely viral source (like coryza) is present. - Management in the amber category involves individualized clinical judgment, which may include observation, further assessment, or targeted investigations, not necessarily immediate invasive tests.

Question 74: A 9-month-old infant presents to the emergency department with a 2-day history of coryza and cough. Today she has become increasingly breathless with poor feeding. On examination, temperature is 37.8°C, respiratory rate is 65 breaths per minute, heart rate is 155 beats per minute, and oxygen saturation is 91% on room air. There is subcostal recession with bilateral fine inspiratory crackles and expiratory wheeze. Capillary refill time is 2 seconds. What is the most important initial management step?

A. Administer nebulised salbutamol
B. Commence supplementary oxygen therapy (Correct Answer)
C. Obtain chest radiograph
D. Administer oral prednisolone
E. Perform nasopharyngeal aspirate for viral PCR

Explanation: ***Commence supplementary oxygen therapy*** - The infant presents with signs consistent with **bronchiolitis** (age, coryza, cough, wheeze, crackles, recession) and **hypoxia** with oxygen saturations of 91% on room air. - **NICE guidelines** state that oxygen is indicated if saturations are persistently **<92%**, making it the most immediate priority in line with the **ABC approach**. *Administer nebulised salbutamol* - **Bronchodilators** like salbutamol are not routinely recommended in infants with bronchiolitis as they do not significantly improve clinical outcomes or shorten hospital stays. - The pathophysiology of bronchiolitis involves **mucus plugging** and edema rather than smooth muscle bronchospasm, making salbutamol largely ineffective. *Obtain chest radiograph* - A **chest X-ray** is not routinely required for bronchiolitis and should only be considered if the diagnosis is uncertain or **atypical features** suggest complications like pneumonia or pneumothorax. - Imaging would delay the essential administration of **supplementary oxygen** in a clearly hypoxic patient, prioritizing investigation over immediate stabilization. *Administer oral prednisolone* - **Corticosteroids** have been proven ineffective in the management of bronchiolitis and are explicitly recommended against in international guidelines. - Unlike asthma, the inflammatory process in bronchiolitis, primarily viral-induced, does not typically respond to steroid therapy. *Perform nasopharyngeal aspirate for viral PCR* - This test is used for **virological surveillance** or infection control (cohorting) but does not change the acute clinical management of the patient. - Stabilizing the infant's **respiratory status** and addressing hypoxia always takes precedence over diagnostic investigations for viral identification.

Question 75: A 7-year-old boy with known asthma is brought to the emergency department with acute breathlessness. He is unable to complete sentences, has a respiratory rate of 42 breaths per minute, heart rate of 145 beats per minute, and oxygen saturation of 89% on room air. He has widespread wheeze with poor air entry bilaterally. Peak expiratory flow rate is 40% of his best. He is started on high-flow oxygen, back-to-back nebulised salbutamol with ipratropium bromide, and oral prednisolone. After 1 hour there is minimal improvement. What is the most appropriate next step in management?

A. Arrange urgent admission to paediatric intensive care unit
B. Administer intravenous magnesium sulphate (Correct Answer)
C. Administer intravenous salbutamol infusion
D. Administer intravenous aminophylline
E. Continue nebulised bronchodilators and reassess in 30 minutes

Explanation: ***Administer intravenous magnesium sulphate***- This patient exhibits features of **severe acute asthma**, including inability to complete sentences, poor air entry, SpO2 89%, and PEFR 40% despite initial maximal nebulized bronchodilators (salbutamol and ipratropium bromide) and oral steroids. - **Intravenous magnesium sulphate** is recommended as the next step in the management of children with acute severe asthma that is refractory to initial bronchodilator therapy, acting as a bronchodilator through smooth muscle relaxation.*Arrange urgent admission to paediatric intensive care unit*- While urgent **PICU consultation** and readiness for admission are crucial for a patient with life-threatening asthma, it is not the immediate drug-based next step before trying other proven intravenous therapies.- **PICU admission** is typically indicated for patients with impending respiratory failure requiring ventilation, a **silent chest**, or those who have failed all available pharmacological interventions.*Administer intravenous salbutamol infusion*- **Intravenous salbutamol** is an advanced therapy for severe asthma, generally considered *after* intravenous magnesium sulphate if the patient remains unresponsive.- This option carries a higher risk of systemic side effects such as **tachycardia** and **hypokalaemia** compared to magnesium sulphate, requiring careful monitoring.*Administer intravenous aminophylline*- **Aminophylline** is a methylxanthine that acts as a bronchodilator, but its use is typically reserved for later stages in the escalation of severe asthma management due to its **narrow therapeutic index**.- It requires close monitoring of **serum levels** to prevent toxicity, which includes arrhythmias, seizures, and gastrointestinal disturbances.*Continue nebulised bronchodilators and reassess in 30 minutes*- This approach is inappropriate as the patient has already shown **minimal improvement** after one hour of maximal nebulised bronchodilator therapy, indicating a refractory and severe exacerbation.- Delaying the escalation to **intravenous therapies** in a child with such severe and unresponsive asthma can lead to further clinical deterioration and **respiratory arrest**.

Question 76: A 5-year-old boy with poorly controlled asthma is reviewed following his third admission for acute exacerbation in 6 months. He is currently on beclometasone 200 micrograms twice daily via spacer, but his mother reports he uses his salbutamol inhaler most days and wakes 2-3 times per week with cough and wheeze. Inhaler technique is checked and is good. What is the most appropriate next step in his management according to current guidelines?

A. Add montelukast 5mg once daily at night while continuing current inhaled corticosteroid dose (Correct Answer)
B. Increase beclometasone to 400 micrograms twice daily
C. Add salmeterol 50 micrograms twice daily to current treatment
D. Switch to fluticasone 125 micrograms twice daily
E. Refer to specialist paediatric respiratory team before making any changes

Explanation: ***Add montelukast 5mg once daily at night while continuing current inhaled corticosteroid dose***- For children aged **5-16 years** who are uncontrolled on low-dose **inhaled corticosteroids (ICS)**, current guidelines (e.g., BTS/SIGN) recommend adding a **Leukotriene Receptor Antagonist (LTRA)** as the first-line add-on therapy.- This patient meets the criteria for Step 3 management due to frequent **salbutamol** use, nocturnal symptoms, and multiple recent hospital admissions, indicating inadequate control despite good inhaler technique.*Increase beclometasone to 400 micrograms twice daily*- Increasing the dose of **ICS** to a moderate dose is generally recommended only if asthma remains uncontrolled after an adequate trial of an **LTRA**.- Escalating ICS dose as the immediate next step without first trying an LTRA can increase the risk of **systemic side effects** without following the preferred stepwise approach.*Add salmeterol 50 micrograms twice daily to current treatment*- While **Long-Acting Beta Agonists (LABA)** are first-line add-ons in adults, in pediatric patients under 16, **LTRA therapy** is prioritized before introducing a LABA at this stage.- If the child fails to respond to an LTRA, a **LABA** would then be considered as an alternative or additional Step 3 therapy.*Switch to fluticasone 125 micrograms twice daily*- Switching between different types of **ICS** at equivalent doses (beclometasone 200mcg BID is broadly comparable to fluticasone 125mcg BID) is not an evidence-based strategy to improve control when a patient is failing a specific step.- Management should focus on escalating to the next **pharmacological step** (e.g., adding an LTRA) rather than horizontal switching of medication classes.*Refer to specialist paediatric respiratory team before making any changes*- Referral to a **specialist pediatric respiratory team** is typically indicated at **Step 4** (uncontrolled on moderate-dose ICS and add-on) or if there is diagnostic uncertainty.- Management at Step 3 can and should be initiated in the **primary care** or general pediatric setting following standardized guidelines.

Question 77: A 4-year-old girl presents with a 5-day history of fever up to 40.2°C. She has been seen twice by her GP and prescribed oral antibiotics for suspected tonsillitis, but fever persists. On examination, she is miserable with temperature 39.8°C, bilateral non-purulent conjunctivitis, dry cracked lips with some bleeding, strawberry tongue, and erythematous palms and soles. There is a faint maculopapular rash on the trunk and a single palpable cervical lymph node measuring 1.8cm. Blood tests show: Hb 105 g/L, WBC 16.5 × 10⁹/L, platelets 445 × 10⁹/L, CRP 125 mg/L, ESR 68 mm/hr, albumin 28 g/L. What is the most critical time-sensitive intervention?

A. Start high-dose aspirin 80mg/kg/day in divided doses
B. Arrange urgent cardiology review and echocardiography
C. Administer intravenous immunoglobulin 2g/kg over 12 hours (Correct Answer)
D. Change antibiotics to intravenous ceftriaxone for possible bacterial infection
E. Perform blood cultures and start broad-spectrum antibiotics

Explanation: ***Administer intravenous immunoglobulin 2g/kg over 12 hours*** - The patient's clinical presentation, including persistent fever for over 5 days with **bilateral non-purulent conjunctivitis**, **dry cracked lips**, **strawberry tongue**, **erythematous palms and soles**, **maculopapular rash**, and **cervical lymphadenopathy**, meets the diagnostic criteria for **Kawasaki Disease**. Administering **IVIG** is the most critical time-sensitive intervention to prevent **coronary artery aneurysms**. - Early administration of **IVIG**, ideally within the first 10 days of illness, significantly reduces the risk of serious cardiac complications from **vasculitis**. *Start high-dose aspirin 80mg/kg/day in divided doses* - While **aspirin** is an important component of Kawasaki disease treatment due to its **anti-inflammatory** and **anti-platelet** effects, it is typically given in conjunction with **IVIG** and is not the primary intervention for preventing **coronary artery abnormalities**. - Prioritizing or delaying **IVIG** administration for aspirin alone would miss the critical window for definitive cardiac protection. *Arrange urgent cardiology review and echocardiography* - An **echocardiogram** is crucial for establishing a baseline and monitoring for **coronary artery aneurysms**, but starting **IVIG** should not be delayed by waiting for this review in a clinically clear case of Kawasaki disease. - Delaying treatment while awaiting imaging increases the risk of progression of **coronary artery vasculitis**. *Change antibiotics to intravenous ceftriaxone for possible bacterial infection* - The distinctive constellation of signs like **strawberry tongue**, **conjunctivitis**, and **palm erythema** is characteristic of **Kawasaki disease**, not typically responsive to antibiotics, especially given the persistence of fever despite prior oral antibiotics. - Pursuing further antibiotic regimens for bacterial infection at this point would delay the appropriate and time-sensitive treatment for **Kawasaki disease**. *Perform blood cultures and start broad-spectrum antibiotics* - Although blood cultures are part of a febrile workup, the specific clinical picture and laboratory findings (**elevated ESR/CRP**, **thrombocytosis** in later phases, **hypoalbuminemia**) strongly suggest an **inflammatory vasculitis** like Kawasaki disease, rather than an undifferentiated bacterial infection. - Continuing with empiric broad-spectrum antibiotics for suspected bacterial infection would delay the critical **IVIG** intervention, which is essential to prevent severe cardiac sequelae.

Question 78: A 10-month-old infant born at 34 weeks gestation presents with a 3-day history of coryzal symptoms, cough, and increasing work of breathing. On examination, temperature is 37.8°C, respiratory rate 65/min, heart rate 155/min, oxygen saturation 91% on air. There is subcostal and intercostal recession, nasal flaring, and bilateral fine inspiratory crackles with wheeze throughout. The infant is feeding 40% of normal volume. Which clinical feature is the strongest indicator for hospital admission?

A. History of prematurity at 34 weeks gestation
B. Respiratory rate of 65 breaths per minute
C. Oxygen saturation of 91% on room air (Correct Answer)
D. Reduced feeding to 40% of normal intake
E. Presence of subcostal and intercostal recession

Explanation: ***Oxygen saturation of 91% on room air*** - This level of **hypoxemia** (SpO2 <92% on room air) is a critical indicator for hospital admission in infants, particularly those with bronchiolitis, as per most clinical guidelines (e.g., **NICE guidelines**). - It signifies significant respiratory compromise requiring **supplemental oxygen** and close monitoring to prevent further deterioration and ensure adequate tissue oxygenation. *History of prematurity at 34 weeks gestation* - While **prematurity** is a significant **risk factor** for developing severe bronchiolitis and having a lower threshold for admission, it is not itself an acute clinical feature demanding immediate admission in the absence of physiological instability. - It highlights the infant's vulnerability but does not independently represent the **strongest indicator** for current acute admission compared to objective signs of respiratory failure. *Respiratory rate of 65 breaths per minute* - A respiratory rate of 65/min indicates **tachypnoea**, which is a sign of respiratory distress in infants. However, for acute admission criteria, rates often need to be higher (e.g., **>70 breaths/min** in infants under 12 months) or accompanied by other severe signs. - While concerning, it is less immediately critical than significant **hypoxemia** as the primary driver for urgent intervention and admission. *Reduced feeding to 40% of normal intake* - **Reduced feeding** (e.g., less than 50-75% of normal) is an important indicator for admission due to the risk of **dehydration** and exhaustion, which can worsen respiratory effort. - However, acute **hypoxemia** (SpO2 91%) represents a more immediate life-threatening physiological derangement requiring urgent medical intervention than the risk of dehydration alone. *Presence of subcostal and intercostal recession* - **Subcostal and intercostal recession** are signs of **increased work of breathing** and respiratory distress, commonly seen in bronchiolitis. - While important indicators of respiratory effort, these are subjective clinical signs that, when present without significant hypoxemia or extreme tachypnea, are less critical than **objectively measured low oxygen saturation** for immediate hospital admission.

Question 79: A 6-year-old girl with asthma on beclometasone 400 micrograms twice daily and salbutamol as needed presents with an acute exacerbation. She has received optimal bronchodilator therapy including back-to-back nebulisers, ipratropium, oral prednisolone, and intravenous magnesium sulphate. Despite this, she remains critically unwell with oxygen saturation 88% on high-flow oxygen, exhaustion, and reduced respiratory effort. Senior anaesthetic and PICU teams are present. What additional pharmacological therapy should be considered before intubation?

A. Intravenous hydrocortisone 100mg stat dose
B. Nebulised adrenaline 1:1000
C. Intravenous aminophylline loading dose then infusion (Correct Answer)
D. Inhaled sevoflurane anaesthetic agent
E. Subcutaneous adrenaline 1:1000

Explanation: ***Intravenous aminophylline loading dose then infusion***- In children with **life-threatening asthma** unresponsive to maximal therapy including **IV magnesium sulphate**, **IV aminophylline** is the next step according to **BTS/SIGN guidelines**.- It acts as a **phosphodiesterase inhibitor** to provide additional bronchodilation but requires **ECG monitoring** due to risks of arrhythmias and toxicity.*Intravenous hydrocortisone 100mg stat dose*- Since the patient has already received **oral prednisolone**, adding IV steroids provides no immediate additional benefit as they have a **slow onset of action**.- Steroids are crucial for reducing **airway inflammation** over hours, but they cannot reverse **acute respiratory failure** or exhaustion immediately.*Nebulised adrenaline 1:1000*- This treatment is primarily indicated for **croup (laryngotracheobronchitis)** to reduce upper airway mucosal edema.- It has no proven role in the management of **lower airway bronchospasm** associated with acute asthma exacerbations.*Inhaled sevoflurane anaesthetic agent*- **Sevoflurane** is a potent bronchodilator but is typically reserved for the **induction of anesthesia** or used within a PICU setting during mechanical ventilation.- It cannot be safely administered to a spontaneously breathing patient in this clinical state **before intubation** has been initiated by the senior team.*Subcutaneous adrenaline 1:1000*- **Subcutaneous adrenaline** is the first-line treatment for **anaphylaxis**, which presents with different clinical features like urticaria or angioedema.- While it can be used for bronchospasm in extreme cases where IV access is impossible, it is not part of the standard escalation for **refractory asthma** in a hospital setting.

Question 80: A 15-month-old child is brought to the emergency department following a brief generalized tonic-clonic seizure at home lasting approximately 3 minutes. The child has had fever for 24 hours with a current temperature of 39.5°C. This is the first seizure. On examination, 30 minutes post-seizure, the child is alert, interactive, and smiling. There are no focal neurological signs. Throat examination shows erythema, and chest is clear. The child is fully immunized. What is the most appropriate immediate management?

A. Perform lumbar puncture to exclude meningitis
B. Admit for 24-hour observation and electroencephalogram
C. Prescribe rectal diazepam for parents to use if further seizures occur
D. Discharge with antipyretic advice and safety-netting information for parents (Correct Answer)
E. Arrange urgent CT head scan to exclude intracranial pathology

Explanation: ***Discharge with antipyretic advice and safety-netting information for parents*** - The child presents with a **simple febrile seizure** (generalized, <15 minutes, occurring once in 24 hours), which is typically benign and requires no specific medical intervention once the child has fully recovered. - Management focuses on treating the underlying **fever** with antipyretics and educating parents on **safety-netting**, such as how to manage future seizures and when to seek urgent medical care. *Perform lumbar puncture to exclude meningitis* - **Lumbar puncture** is not indicated as the child is alert, smiling, and interactive with no signs of **meningism** or bulging fontanelle. - This procedure is generally reserved for children under 12 months with suspected meningitis or those showing persistent **altered mental status**. *Admit for 24-hour observation and electroencephalogram* - Admission is unnecessary for a **simple febrile seizure** if the child is clinically stable and a source of infection (like erythema of the throat) is identified. - An **EEG** is not recommended after a first simple febrile seizure because it does not reliably predict the risk of future **epilepsy**. *Prescribe rectal diazepam for parents to use if further seizures occur* - **Rescue medications** like rectal diazepam or buccal midazolam are not routinely prescribed after a single, short-lived simple febrile seizure. - These medications are typically reserved for children with a history of **prolonged seizures** (status epilepticus) or frequent clusters. *Arrange urgent CT head scan to exclude intracranial pathology* - Neuroimaging is not indicated for simple febrile seizures occurring in a child with a **normal neurological examination** and no signs of increased intracranial pressure. - A **CT head** would only be considered if there were focal neurological deficits, signs of trauma, or persistent **reduced consciousness**.

Question 81: A 3-year-old boy with recurrent viral-induced wheeze is brought to the emergency department with increased work of breathing and wheeze. This is his third episode requiring hospital attendance this year. His parents report he is well between episodes and has no interval symptoms. What is the most appropriate long-term management strategy to discuss with the parents before discharge?

A. Regular daily inhaled corticosteroids to prevent future episodes
B. Parent-initiated oral montelukast at the onset of coryzal symptoms (Correct Answer)
C. Daily low-dose oral prednisolone during winter months
D. Regular daily long-acting beta-agonist (salmeterol) with salbutamol as needed
E. Salbutamol as needed only, with no preventive therapy

Explanation: ***Parent-initiated oral montelukast at the onset of coryzal symptoms***- This child presents with **episodic viral wheeze**, characterized by symptoms only during viral infections with **no interval symptoms** between episodes.- For recurrent, problematic viral-induced wheeze, **intermittent leukotriene receptor antagonists (LTRA)** like montelukast started at the first sign of a cold can reduce the severity and duration of the episode.*Regular daily inhaled corticosteroids to prevent future episodes*- **Daily inhaled corticosteroids (ICS)** are the mainstay for **multi-trigger wheeze** or asthma but are generally less effective for purely viral-induced wheeze.- ICS may be considered if intermittent montelukast fails, but it is not the first-line choice when there are no interval symptoms.*Daily low-dose oral prednisolone during winter months*- **Daily oral corticosteroids** are avoided in children due to significant **systemic side effects**, including growth suppression and adrenal suppression.- Management of wheeze focuses on **inhaled therapies** or targeted intermittent oral treatments rather than long-term systemic steroids.*Regular daily long-acting beta-agonist (salmeterol) with salbutamol as needed*- **Long-acting beta-agonists (LABA)** must never be used as monotherapy; they must always be prescribed alongside an **inhaled corticosteroid**.- LABAs are not indicated for the management of **episodic viral wheeze** in a 3-year-old child.*Salbutamol as needed only, with no preventive therapy*- While salbutamol is used for **acute symptom relief**, this child has had **three hospital attendances** in one year, indicating that "as needed" therapy alone is insufficient.- Clinical guidelines recommend initiating **preventative strategies** (like intermittent LTRA) when episodes are frequent or severe enough to require hospital visits.

Question 82: A 6-month-old infant presents with a 24-hour history of fever to 38.9°C and decreased feeding. The infant was born at term with no significant medical history. On examination, the infant is irritable, temperature 38.7°C, heart rate 155/min, respiratory rate 42/min, and capillary refill time 2 seconds. There is no rash, the fontanelle is not bulging, and systemic examination is unremarkable. Blood tests show: WBC 18.2 × 10⁹/L, CRP 65 mg/L. Urine dipstick is negative. What is the most appropriate next step in management?

A. Discharge with safety-netting advice and arrange GP review in 24 hours
B. Perform lumbar puncture, blood culture, and start intravenous antibiotics (Correct Answer)
C. Prescribe oral antibiotics and arrange paediatric review in 48 hours
D. Observe in hospital for 4 hours and repeat observations before deciding on discharge
E. Arrange chest X-ray and start oral antibiotics if pneumonia is confirmed

Explanation: ***Perform lumbar puncture, blood culture, and start intravenous antibiotics*** - Infants aged **under 3 months** with a fever of **38°C or higher** or those aged **3–6 months** with **elevated inflammatory markers** (CRP >60 mg/L or WBC >15 x 10⁹/L) are at high risk for **serious bacterial infection (SBI)**. - Appropriate management includes a full **septic screen** (blood cultures, urine culture, and lumbar puncture) and immediate administration of **intravenous antibiotics** to cover potential meningitis or bacteremia. *Discharge with safety-netting advice and arrange GP review in 24 hours* - This approach is unsafe given the significantly **elevated CRP (65 mg/L)** and **WBC (18.2 × 10⁹/L)**, which indicate a high risk of occult infection. - Discharge is only considered for infants at **low risk** using validated clinical tools (like the NICE traffic light system) and with normal investigation findings. *Prescribe oral antibiotics and arrange paediatric review in 48 hours* - **Oral antibiotics** are inappropriate for an irritable infant with high inflammatory markers, as **intravenous therapy** is required to ensure adequate systemic coverage. - Delaying review for 48 hours is dangerous in this age group as **sepsis** or **meningitis** can progress rapidly without aggressive inpatient management. *Observe in hospital for 4 hours and repeat observations before deciding on discharge* - Observation alone is insufficient when **inflammatory markers** exceed the threshold for high risk; medical intervention should not be delayed by simple monitoring. - While observations are important, they cannot rule out **occult bacteremia** or **early meningitis** in an irritable infant with a fever. *Arrange chest X-ray and start oral antibiotics if pneumonia is confirmed* - There is no clinical indication for a chest X-ray as the **respiratory rate (42/min)** is within normal limits for a 6-month-old and there are no **respiratory distress** signs. - Pneumonia is an unlikely source here, and the focus must remain on ruling out **life-threatening infections** through a septic screen first.

Question 83: A 5-year-old boy with known asthma on beclometasone 200 micrograms twice daily presents with wheeze and breathlessness after playing outside. In the emergency department, he receives salbutamol via spacer (10 puffs) and his symptoms improve. He is speaking in full sentences, oxygen saturation is 97% on air, respiratory rate 22/min, and peak flow is now 80% of predicted. He has mild scattered wheeze. The emergency department doctor is considering discharge. What is the most important additional treatment before discharge?

A. Increase his regular beclometasone to 400 micrograms twice daily
B. Add montelukast 4mg once daily for 7 days
C. Prescribe oral prednisolone 20mg once daily for 3 days (Correct Answer)
D. Add ipratropium bromide inhaler to use four times daily
E. Prescribe a 7-day course of oral antibiotics

Explanation: ***Prescribe oral prednisolone 20mg once daily for 3 days*** - This child experienced an **acute asthma exacerbation** requiring ED treatment, necessitating a short course of **oral corticosteroids** to reduce inflammation and prevent relapse. - **National guidelines** recommend oral prednisolone (20mg for 5-11 years) for 3 days post-exacerbation, providing essential systemic **anti-inflammatory** effect. *Increase his regular beclometasone to 400 micrograms twice daily* - Adjusting **maintenance inhaled corticosteroid (ICS)** dose is a long-term management strategy, not the primary intervention for discharge after an acute exacerbation. - While important for control, increased ICS alone does not provide the same rapid and systemic anti-inflammatory benefit as a short course of **oral steroids** to prevent acute relapse. *Add montelukast 4mg once daily for 7 days* - **Montelukast** is a **leukotriene receptor antagonist** for **long-term asthma control** or exercise-induced asthma, not for acute exacerbation management or preventing immediate relapse. - A short 7-day course of montelukast is not a substitute for **oral corticosteroids** in providing prompt anti-inflammatory effects after an acute attack. *Add ipratropium bromide inhaler to use four times daily* - **Ipratropium bromide** is an **anticholinergic bronchodilator** typically used in **severe acute asthma exacerbations** within the emergency setting. - It is not indicated for routine home discharge plans for a child who has responded well to **salbutamol** and has mild residual symptoms. *Prescribe a 7-day course of oral antibiotics* - **Asthma exacerbations** are predominantly triggered by **viral infections**, allergens, or irritants, making **antibiotics** generally ineffective and inappropriate. - There are no clinical signs (e.g., fever, purulent sputum) in this patient to suggest a **bacterial infection** requiring antibiotic treatment.

Question 84: What is the recommended first-line inhaler device for delivering salbutamol to a 3-year-old child with acute wheeze in the emergency department who does not require hospital admission?

A. Nebuliser with face mask
B. Metered-dose inhaler with large volume spacer (Correct Answer)
C. Dry powder inhaler
D. Metered-dose inhaler alone without spacer
E. Breath-actuated metered-dose inhaler

Explanation: ***Metered-dose inhaler with large volume spacer*** - For children under 5 years, **BTS/SIGN guidelines** recommend a metered-dose inhaler (MDI) with a **spacer and mask** as the first-line delivery method for mild to moderate acute wheeze. - This method is as effective as **nebulisation** for bronchodilator delivery, carries a lower risk of side effects like **tachycardia**, and is more cost-effective. *Nebuliser with face mask* - **Nebulisers** are generally reserved for patients with **severe or life-threatening asthma** who may require high concentrations of **oxygen** during treatment or are unable to cooperate with a spacer. - They are no more effective than an **MDI plus spacer** for mild to moderate episodes and are more time-consuming to set up, making them less ideal for first-line use in non-severe cases. *Dry powder inhaler* - These devices require a strong, deep **inspiratory flow rate** to aerosolize the medication effectively, which is typically not achievable by a **3-year-old** child. - They are generally only suitable for older children (usually over **5–7 years**) who can follow specific breathing instructions and generate sufficient inspiratory force. *Metered-dose inhaler alone without spacer* - Using an MDI alone requires precise **hand-breath coordination**, which is impossible for a toddler and leads to poor **lung deposition** of the medication. - Without a spacer, most of the medication impacts the **oropharynx** due to high velocity, rather than reaching the lower airways. *Breath-actuated metered-dose inhaler* - While triggered by inhalation, these devices require a specific **minimum inspiratory flow** that small children cannot consistently generate, similar to dry powder inhalers. - They are not recommended for children under **5 years old** or for the management of acute respiratory distress where breathing is shallow and inconsistent.

Question 85: An 11-month-old infant is brought to the emergency department with a 6-hour history of fever to 40.1°C and increasing lethargy. On examination, the infant is drowsy with cool peripheries, mottled skin, capillary refill time of 4 seconds centrally, heart rate 170/min, respiratory rate 50/min, and blood pressure 65/40 mmHg. There are several non-blanching purpuric lesions on the trunk and limbs. What is the most appropriate immediate management?

A. Obtain blood cultures, perform lumbar puncture, then administer intravenous ceftriaxone
B. Administer intramuscular benzylpenicillin immediately and arrange urgent transfer
C. Establish intravenous access, give 20ml/kg bolus of 0.9% sodium chloride, and administer intravenous ceftriaxone (Correct Answer)
D. Administer oxygen, obtain blood cultures, and start broad-spectrum antibiotics after lumbar puncture
E. Give intravenous aciclovir and ceftriaxone after obtaining cerebrospinal fluid sample

Explanation: ***Establish intravenous access, give 20ml/kg bolus of 0.9% sodium chloride, and administer intravenous ceftriaxone*** - The infant presents with features of **septic shock** (hypotension, mottled skin, prolonged capillary refill time) and strongly suspected **meningococcal septicaemia** due to the non-blanching purpuric lesions; immediate **fluid resuscitation** and broad-spectrum antibiotics are critical and life-saving. - **Intravenous ceftriaxone** is the first-line empirical antibiotic for suspected meningococcal disease in a hospital setting, offering broad coverage and excellent **CNS penetration**. *Obtain blood cultures, perform lumbar puncture, then administer intravenous ceftriaxone* - A **lumbar puncture** is **contraindicated** in a patient exhibiting signs of hemodynamic instability (shock) or potential raised intracranial pressure, as it carries a high risk of cerebral herniation. - **Antibiotics** should be administered **immediately** in severe sepsis and septic shock, ideally after blood cultures but never delayed by diagnostic procedures like blood cultures or lumbar puncture. *Administer intramuscular benzylpenicillin immediately and arrange urgent transfer* - **Intramuscular benzylpenicillin** is primarily recommended as a **pre-hospital** emergency intervention for suspected meningococcal disease to minimize delay to initial antibiotics before hospital arrival. - Since the infant is already in the **Emergency Department** with signs of severe shock, establishing intravenous access for rapid fluid resuscitation and comprehensive IV antibiotic delivery is the immediate priority. *Administer oxygen, obtain blood cultures, and start broad-spectrum antibiotics after lumbar puncture* - Performing a **lumbar puncture** in a critically unstable infant with signs of shock (BP 65/40 mmHg) is highly dangerous and can precipitate **cerebral herniation** or further cardiorespiratory compromise. - While oxygen is important, the core immediate management for **septic shock** involves aggressive fluid resuscitation and rapid administration of antibiotics, not delaying antibiotics for an LP. *Give intravenous aciclovir and ceftriaxone after obtaining cerebrospinal fluid sample* - **Aciclovir** is an antiviral agent used for herpes simplex encephalitis/meningitis, which presents differently, typically with seizures or focal neurological deficits, not primarily with **purpuric rash** and profound shock. - Delaying critical treatments like **antibiotics** and fluid resuscitation to obtain a **cerebrospinal fluid (CSF) sample** is unacceptable and significantly increases mortality risk in an infant with suspected bacterial sepsis and shock.

Question 86: A 2-year-old child presents with a 72-hour history of fever ranging from 38.5-39.9°C. The parents report the child has been irritable and refusing food but is drinking adequately. On examination, the child is alert but irritable, with a temperature of 39.2°C, heart rate 140/min, respiratory rate 28/min, and capillary refill time less than 2 seconds. There is bilateral conjunctival injection, erythematous cracked lips, a polymorphous rash on the trunk, and cervical lymphadenopathy with one node measuring 2cm. What is the most likely diagnosis?

A. Scarlet fever
B. Kawasaki disease (Correct Answer)
C. Measles
D. Infectious mononucleosis
E. Staphylococcal toxic shock syndrome

Explanation: ***Kawasaki disease*** - This diagnosis is strongly supported by the prolonged fever (72 hours) coupled with the characteristic findings of **bilateral conjunctival injection**, **erythematous cracked lips**, a **polymorphous rash on the trunk**, and **cervical lymphadenopathy** (node >1.5 cm), which meet several diagnostic criteria for the disease. - Early recognition is crucial as **Kawasaki disease** is a **vasculitis** that can lead to serious complications like **coronary artery aneurysms** if not treated promptly with **intravenous immunoglobulin (IVIG)** and **aspirin**. *Scarlet fever* - While scarlet fever presents with fever and a rash, the rash is typically a fine, **sandpaper-like exanthem**, and it often includes a **strawberry tongue** with a significant sore throat. - This condition does not typically cause **non-purulent conjunctivitis** or the distinct **cracked lips** seen in this patient. *Measles* - Measles is characterized by a prodrome of **cough, coryza, and conjunctivitis** (the

Question 87: A 4-year-old girl with asthma presents to the emergency department with an acute exacerbation. She has received three doses of salbutamol nebulisers and one dose of ipratropium bromide, alongside oral prednisolone. Two hours after initial treatment, she remains breathless with oxygen saturation of 91% on 15L oxygen via non-rebreathe mask, respiratory rate 45/min, and is now speaking only in words. She has reduced air entry bilaterally with poor respiratory effort. What is the next most appropriate treatment?

A. Intravenous magnesium sulphate (Correct Answer)
B. Intravenous aminophylline infusion
C. Intravenous salbutamol infusion
D. Continue back-to-back nebulisers and reassess in 15 minutes
E. Prepare for intubation and mechanical ventilation

Explanation: ***Intravenous magnesium sulphate***- This patient demonstrates features of **life-threatening asthma**, including oxygen saturations **<92%** on high-flow oxygen, poor respiratory effort, and the ability to speak only in words.- According to **BTS/SIGN guidelines**, intravenous magnesium sulphate is the first-line intravenous therapy for children who do not respond to initial inhaled **bronchodilators and steroids**.*Intravenous aminophylline infusion*- This is generally considered a **second-line intravenous treatment** and is added if magnesium sulphate or salbutamol infusions fail to show improvement.- It requires careful **therapeutic drug monitoring** due to its narrow therapeutic index and significant cardiovascular side effects.*Intravenous salbutamol infusion*- IV salbutamol is usually reserved as a **third-line escalation** or an alternative when magnesium sulphate is ineffective or there is a rapid decline.- It carries a risk of **tachycardia** and **electrolyte imbalances** (hypokalaemia), making earlier interventions like magnesium sulphate preferable.*Continue back-to-back nebulisers and reassess in 15 minutes*- This patient already presents with **reduced air entry** and poor effort, indicating that inhaled medication is likely not reaching the distal airways effectively.- Delaying escalation in the presence of **life-threatening features** and failing oxygen levels significantly increases the risk of respiratory arrest.*Prepare for intubation and mechanical ventilation*- While PICU should be alerted and preparations made, medical therapy with **IV bronchodilators** should be attempted first unless there is imminent respiratory collapse.- **Mechanical ventilation** in asthma is technically difficult and high-risk due to air-trapping, making it a last-resort intervention.

Question 88: A 9-month-old infant presents with a 48-hour history of fever up to 39.8°C. The child appears miserable when examined but is consolable when picked up by the mother. Respiratory rate is 35/min, heart rate 145/min, and capillary refill time 2 seconds centrally. There is no rash, the chest is clear, tympanic membranes appear normal, and throat examination is unremarkable. Urine dipstick shows leucocytes 2+, nitrites positive, and trace protein. What is the most appropriate initial management?

A. Oral antibiotics and arrange follow-up in 24 hours
B. Send urine for microscopy and culture, discharge with safety-netting advice
C. Admit for intravenous antibiotics and further investigation (Correct Answer)
D. Perform blood cultures and lumbar puncture before starting antibiotics
E. Prescribe oral antibiotics only if urine culture confirms infection

Explanation: ***Admit for intravenous antibiotics and further investigation***- This 9-month-old infant with a **high fever (39.8°C)**, appearing **miserable**, and showing a positive urine dipstick (**leucocytes 2+, nitrites positive**) is highly suggestive of a **urinary tract infection (UTI)**.- In infants under 1 year with suspected UTI and fever, or those who appear unwell, immediate admission for **intravenous antibiotics** and further investigation (e.g., urine culture, renal imaging) is crucial to prevent complications like **renal scarring**.*Oral antibiotics and arrange follow-up in 24 hours*- Given the infant's **age (9 months)**, **high fever**, and **unwell appearance**, oral antibiotics alone are insufficient and potentially dangerous as initial management.- This approach risks inadequate treatment for a possible **pyelonephritis**, leading to clinical deterioration and **long-term renal damage**.*Send urine for microscopy and culture, discharge with safety-netting advice*- Discharging a febrile 9-month-old with clear signs of a UTI (**positive nitrites and leucocytes**) is unsafe due to the high risk of **urosepsis** and renal complications.- While urine collection for microscopy and culture is essential, it does not replace the need for immediate empirical antibiotic treatment and inpatient monitoring.*Perform blood cultures and lumbar puncture before starting antibiotics*- While **blood cultures** are indicated in a febrile infant to rule out **bacteraemia**, a **lumbar puncture** is typically reserved for those with neurological signs or infants under 1-3 months of age without a clear source.- Delaying antibiotic initiation to perform a lumbar puncture in an infant with a clear focus of infection (UTI) is not the most appropriate initial step.*Prescribe oral antibiotics only if urine culture confirms infection*- Withholding empirical antibiotic treatment until **urine culture results** are available (which takes 24-48 hours) is unsafe for a febrile, unwell infant with a strong likelihood of UTI.- The presence of **nitrites** on urine dipstick has high specificity for UTI and, combined with clinical findings, warrants prompt initiation of antibiotics to prevent morbidity.

Question 89: A 7-year-old boy with known asthma presents to the emergency department with acute breathlessness and wheeze. His respiratory rate is 28/min, heart rate 115/min, and oxygen saturation 94% on room air. He is able to speak in sentences and has widespread polyphonic wheeze on auscultation. Peak expiratory flow is 65% of his predicted best. What is the most appropriate classification of this asthma exacerbation?

A. Mild asthma exacerbation
B. Moderate acute asthma (Correct Answer)
C. Acute severe asthma
D. Life-threatening asthma
E. Near-fatal asthma

Explanation: ***Moderate acute asthma***- A **moderate acute asthma** exacerbation in children >5 years is defined by a **Peak Expiratory Flow (PEF)** between **50-75%** of predicted and the ability to **speak in sentences**.- This patient's clinical markers (HR 115/min, RR 28/min, and **SpO2 94%**) fall within the parameters for moderate severity as they do not meet the criteria for severe or life-threatening status.*Mild asthma exacerbation*- Mild episodes typically feature a **PEF >75%** of the patient's best or predicted value and minimal clinical distress.- The **PEF of 65%** and the presence of widespread polyphonic wheeze shift the classification toward a **moderate** presentation.*Acute severe asthma*- In children aged >5 years, **severe asthma** criteria include a **PEF <50%**, a **heart rate >125/min**, or a **respiratory rate >30/min**.- Since this patient can **speak in sentences** and has a heart rate of 115/min, he does not meet these severity thresholds.*Life-threatening asthma*- This category is identified by clinical signs like a **silent chest**, cyanosis, **exhaustion**, or a **PEF <33%** of predicted.- The patient's **SpO2 of 94%** and normal level of consciousness help exclude this life-threatening classification.*Near-fatal asthma*- Near-fatal asthma is characterized by a **raised PaCO2** level or the requirement for **mechanical ventilation**.- There is no evidence of hypercarboxia or **respiratory failure** in this clinical scenario.

Question 90: A 14-month-old child presents to the emergency department with a 6-day history of persistent fever (38.9-40.1°C daily). The parents report the child has been increasingly irritable with decreased activity and reduced oral intake. There is no cough, vomiting, diarrhoea, or rash. On examination, temperature 39.7°C, heart rate 158/min, respiratory rate 34/min, capillary refill time 2 seconds. The child appears miserable and irritable even when held by parents. There is bilateral non-purulent conjunctival injection, strawberry tongue, cracked lips, and a maculopapular rash on trunk and limbs. Hands and feet appear erythematous and swollen. No palpable lymphadenopathy. Which investigation finding would most strongly support the need for urgent echocardiography in this child?

A. Platelet count of 682 × 10⁹/L
B. C-reactive protein of 156 mg/L
C. Albumin level of 26 g/L (Correct Answer)
D. White cell count of 19.4 × 10⁹/L
E. Erythrocyte sedimentation rate of 88 mm/hr

Explanation: ***Albumin level of 26 g/L*** - **Hypoalbuminemia** (≤30 g/L) is a critical laboratory marker indicating **increased vascular permeability** and severe systemic inflammation in Kawasaki disease (KD). - It is a recognized independent risk factor for **intravenous immunoglobulin (IVIG) resistance** and a higher likelihood of developing **coronary artery aneurysms (CAAs)**, thus strongly warranting urgent echocardiography. *Platelet count of 682 × 10⁹/L* - **Thrombocytosis** is a characteristic feature of the **subacute phase** of KD, typically peaking in the second to third week of illness, not the acute phase described. - While supportive of KD, it is not an early predictor of **coronary artery complications** that would necessitate urgent echocardiography during the acute febrile stage. *C-reactive protein of 156 mg/L* - An elevated **CRP** is a common indicator of acute inflammation in KD and is part of the diagnostic criteria for **incomplete Kawasaki disease**. - Although it reflects disease activity, it is a non-specific marker of inflammation and does not carry the same specific prognostic weight for **cardiac risk** as severe hypoalbuminemia. *White cell count of 19.4 × 10⁹/L* - **Leukocytosis** with neutrophilia is frequently observed in the acute febrile phase of KD, indicating an active inflammatory response. - This finding is common in many childhood infections and does not specifically stratify a patient's risk for **coronary artery abnormalities** or dictate the urgency for echocardiography compared to other specific markers. *Erythrocyte sedimentation rate of 88 mm/hr* - A significantly raised **ESR** is a hallmark of systemic inflammation in KD and is used both for diagnosis and monitoring treatment response. - Similar to CRP, while it reflects high systemic inflammation, it is not as strong or specific an independent predictor of **coronary artery abnormalities** requiring urgent echocardiography as hypoalbuminemia.

Question 91: An 8-year-old girl with known asthma presents with acute breathlessness after playing football. She uses her salbutamol inhaler 6 puffs via spacer with minimal improvement. On examination, she speaks in full sentences, respiratory rate 32/min, heart rate 118/min, oxygen saturation 95% in air. Chest examination reveals bilateral expiratory wheeze with good air entry. Peak expiratory flow rate (PEFR) is 165 L/min (65% of her predicted best). She receives 10 puffs of salbutamol via spacer. After 15 minutes, she feels better with PEFR improved to 210 L/min (82% of predicted). Understanding the pathophysiology of her condition, which mechanism best explains the immediate bronchodilator effect of salbutamol?

A. Inhibition of phosphodiesterase leading to increased cyclic AMP
B. Stimulation of beta-2 adrenergic receptors causing smooth muscle relaxation (Correct Answer)
C. Blockade of muscarinic receptors reducing bronchoconstriction
D. Inhibition of mast cell degranulation preventing mediator release
E. Reduction of airway inflammation through suppression of cytokine production

Explanation: ***Stimulation of beta-2 adrenergic receptors causing smooth muscle relaxation***- **Salbutamol** is a short-acting **beta-2 adrenergic agonist (SABA)** that binds to **beta-2 receptors** on **bronchial smooth muscle cells**.- This binding activates **adenylyl cyclase**, leading to an increase in intracellular **cyclic AMP (cAMP)**, which ultimately causes **smooth muscle relaxation** and **bronchodilation**, explaining the immediate improvement in **PEFR**.*Inhibition of phosphodiesterase leading to increased cyclic AMP*- This mechanism is characteristic of **theophylline** and **aminophylline**, which prevent the breakdown of **cAMP**.- **Salbutamol** primarily increases **cAMP** levels by stimulating its production rather than inhibiting its degradation.*Blockade of muscarinic receptors reducing bronchoconstriction*- This describes the action of **anticholinergic** medications like **ipratropium bromide**, which block the effects of **acetylcholine**.- While used in asthma, this is not the mechanism by which **salbutamol** exerts its bronchodilator effect, as **salbutamol** is an **agonist**, not an **antagonist**.*Inhibition of mast cell degranulation preventing mediator release*- This is the mechanism of **mast cell stabilizers** such as **sodium cromoglicate**, used for **prophylaxis** in asthma.- These agents do not provide **immediate bronchodilation** and are ineffective for **acute asthma exacerbations**.*Reduction of airway inflammation through suppression of cytokine production*- This describes the action of **corticosteroids** (e.g., prednisolone), which work to reduce **airway inflammation** by altering gene expression.- **Corticosteroids** have a delayed onset of action and do not provide the **immediate** bronchodilator relief seen with **salbutamol**.

Question 92: A 5-year-old girl presents to the emergency department with a 4-day history of high fever (maximum 40.2°C), lethargy, and reduced oral intake. She initially had a sore throat that has now resolved. On examination, temperature is 39.6°C, heart rate 142/min, respiratory rate 28/min, blood pressure 98/58 mmHg. She has shotty cervical lymphadenopathy, splenomegaly (3 cm below costal margin), and small petechiae on the soft palate. There is no tonsillar enlargement or exudate. Blood tests show: Hb 118 g/L, WCC 18.4 × 10⁹/L (lymphocytes 12.2 × 10⁹/L, with 35% atypical lymphocytes), platelets 168 × 10⁹/L, CRP 24 mg/L. Liver function tests show ALT 156 U/L, AST 142 U/L. What is the most likely diagnosis?

A. Acute lymphoblastic leukaemia
B. Infectious mononucleosis (Correct Answer)
C. Kawasaki disease
D. Acute bacterial tonsillitis
E. Cytomegalovirus infection

Explanation: ***Infectious mononucleosis***- The constellation of **high fever**, **splenomegaly**, **shotty cervical lymphadenopathy**, and **palatal petechiae** in a child, following a sore throat, is highly suggestive of **Epstein-Barr virus (EBV)** infection, which causes infectious mononucleosis.- The laboratory findings of marked **atypical lymphocytosis** (35%) and elevated **transaminases** (ALT 156 U/L, AST 142 U/L) are classic diagnostic markers for this condition.*Acute lymphoblastic leukaemia*- While leukaemia can present with fever and organomegaly, it typically features more pronounced **pancytopenia** (severe anemia, thrombocytopenia) and the presence of **blast cells**, not predominantly atypical lymphocytes.- This patient's **hemoglobin** and **platelet count** are relatively preserved, making acute lymphoblastic leukaemia less likely than a viral cause for this picture.*Kawasaki disease*- This diagnosis requires at least 5 days of fever along with specific clinical criteria such as **bilateral conjunctivitis**, **strawberry tongue**, or **extremity changes** (e.g., desquamation), which are not described here.- While there is fever and lymphadenopathy, the **CRP** of 24 mg/L is relatively low for typical Kawasaki disease, which usually shows a much higher systemic inflammatory response.*Acute bacterial tonsillitis*- Acute bacterial tonsillitis typically presents with **neutrophilia** and often **tonsillar exudates**, which are explicitly stated to be absent in this patient.- It does not account for the significant **splenomegaly**, **palatal petechiae**, or the marked elevation in **liver enzymes** observed in this case.*Cytomegalovirus infection*- **Cytomegalovirus (CMV)** can cause a mononucleosis-like syndrome with similar lab abnormalities like atypical lymphocytosis and elevated transaminases, but it is generally less common than EBV in immunocompetent children.- CMV infection often lacks the prominent **pharyngitis** and **palatal petechiae** that are characteristic of EBV-induced infectious mononucleosis.

Question 93: A 3-year-old boy is reviewed in the emergency department 30 minutes after presenting with acute wheeze. He has had two previous similar episodes associated with viral upper respiratory tract infections, both of which resolved with salbutamol. He is not on any regular medication. He received 10 puffs of salbutamol via spacer on arrival. Current observations: respiratory rate 36/min, heart rate 128/min, oxygen saturation 96% in air. He is talking in sentences, has mild expiratory wheeze, and no recession. His parents are confident in managing him at home. What is the most appropriate management plan for discharge?

A. Salbutamol inhaler with spacer as needed, return if deteriorates (Correct Answer)
B. Salbutamol inhaler with spacer 2 puffs four times daily for 5 days
C. Salbutamol inhaler with spacer as needed and commence beclometasone inhaler 100 micrograms twice daily
D. Salbutamol inhaler with spacer as needed and prednisolone 20mg once daily for 3 days
E. Salbutamol inhaler with spacer as needed and montelukast 4mg once daily

Explanation: ***Salbutamol inhaler with spacer as needed, return if deteriorates*** - The child presents with **viral-induced wheeze** that has responded well to initial **salbutamol**, showing clinical stability with good oxygen saturation and no severe distress. This indicates **symptom-triggered** management is appropriate for discharge. - According to **NICE** and **BTS/SIGN guidelines** for pre-school wheeze, if the child is stable and improving after a mild to moderate exacerbation, **short-acting beta-agonists (SABA)** should be prescribed **as needed** for symptomatic relief, with clear instructions on when to return. *Salbutamol inhaler with spacer 2 puffs four times daily for 5 days* - **Fixed-dose** or regular use of salbutamol is generally not recommended for **episodic viral wheeze** in pre-school children once the acute episode has resolved, as it can lead to unnecessary side effects like **tachycardia** or tremor. - Management should be guided by **symptoms**; a rigid 5-day course does not account for individual variability in recovery or the risk of over-treatment. *Salbutamol inhaler with spacer as needed and commence beclometasone inhaler 100 micrograms twice daily* - **Inhaled corticosteroids (ICS)** are typically reserved for **persistent asthma** or **multi-trigger wheeze** where symptoms occur frequently (e.g., at least 3 times a week) or are severe, which is not indicated in this case of episodic viral wheeze. - Starting a regular **preventer inhaler** like beclometasone is not indicated for an isolated, well-managed episode of viral-induced wheeze, especially without evidence of **frequent exacerbations** or **atopic features**. *Salbutamol inhaler with spacer as needed and prednisolone 20mg once daily for 3 days* - **Oral corticosteroids** such as prednisolone are usually reserved for **severe asthma exacerbations** or **viral-induced wheeze** not responding to bronchodilators, or in cases of significant respiratory distress. - This child's current observations and clinical status (talking in sentences, mild wheeze, no recession, good sats) do not meet the criteria for requiring **systemic steroids** upon discharge. *Salbutamol inhaler with spacer as needed and montelukast 4mg once daily* - **Montelukast** is a **leukotriene receptor antagonist** used as an alternative or add-on therapy, often considered for children with **frequent viral-induced wheeze** or those with **exercise-induced asthma**. - Initiating montelukast after a single, well-controlled mild episode is not standard practice for immediate discharge management unless there's an established pattern of **frequent** or **difficult-to-manage** symptoms warranting a preventative agent.

Question 94: A 10-month-old infant with a 2-day history of coryzal symptoms and cough is brought to hospital with increased work of breathing. Temperature is 37.8°C, respiratory rate 68/min, heart rate 162/min, oxygen saturation 93% in air. There is subcostal recession and bilateral fine inspiratory crackles with occasional wheeze. The infant is taking approximately 50% of normal feeds. A clinical diagnosis of bronchiolitis is made. Which of the following factors would be the strongest indication for admission to hospital in this infant?

A. Age less than 12 months
B. Oxygen saturation 93% in air (Correct Answer)
C. Respiratory rate 68/min
D. Taking 50% of normal feeds
E. Presence of subcostal recession

Explanation: ***Oxygen saturation 93% in air***- While **NICE guidelines** often use a threshold of **persistent oxygen saturation <92%** as a primary indication for admission in bronchiolitis, 93% is borderline and signifies a critical level requiring close observation for deterioration.- **Hypoxia** is a direct and objective measure of compromised respiratory function, and even mild desaturation in an infant with increased work of breathing indicates significant risk and is a stronger indicator than other signs alone.*Age less than 12 months*- While infants **under 3 months** are considered high-risk for severe bronchiolitis and admission, a 10-month-old infant, though young, doesn't automatically require admission solely based on age without other severe clinical signs.- Many 10-month-old infants with mild-to-moderate bronchiolitis can be safely managed at home if other **red flag symptoms** are absent and oxygenation is adequate.*Respiratory rate 68/min*- An elevated **respiratory rate** indicates increased work of breathing, but guidelines often specify rates **above 70/min** as a more definitive threshold for admission in infants of this age.- While concerning, a high respiratory rate alone is often secondary to the airway inflammation and is less critical than **hypoxemia** as an immediate admission criterion.*Taking 50% of normal feeds*- Reduced fluid intake is a concern for **dehydration**, and admission is typically considered when intake is consistently **below 50-75%** of normal, or there are signs of **clinical dehydration**.- However, compared to a borderline oxygen saturation, reduced feeding, without overt signs of severe dehydration, is generally a less acute and immediate indication for hospitalization.*Presence of subcostal recession*- **Subcostal recession** is a common sign of increased **work of breathing** in bronchiolitis and can be mild to moderate.- Admission based on recession is usually for **severe recession**, nasal flaring, grunting, or other signs of significant respiratory distress that indicate impending respiratory failure, which is not as acutely critical as compromised oxygenation.

Question 95: A 13-month-old child presents with a 4-day history of persistent fever ranging from 38.8-39.9°C. The parents report no specific symptoms apart from irritability and reduced appetite. On examination, the child is miserable but consolable, temperature 39.3°C, heart rate 148/min, respiratory rate 32/min, capillary refill time 2 seconds. Examination reveals bilateral non-purulent conjunctivitis, dry cracked lips, and a polymorphous rash on the trunk. Cervical lymphadenopathy is noted with one node measuring 1.8 cm. Extremities show mild erythema of palms and soles. Blood tests reveal: Hb 102 g/L, WCC 16.8 × 10⁹/L, platelets 512 × 10⁹/L, CRP 98 mg/L, albumin 28 g/L. What is the most appropriate definitive treatment?

A. Intravenous immunoglobulin 2 g/kg as a single dose (Correct Answer)
B. High-dose aspirin 80-100 mg/kg/day until fever settles
C. Intravenous ceftriaxone 80 mg/kg/day for 7 days
D. Oral prednisolone 2 mg/kg/day for 5 days
E. Supportive care with fluids and antipyretics only

Explanation: ***Intravenous immunoglobulin 2 g/kg as a single dose*** - The child presents with classic criteria for **Kawasaki disease**, including persistent high fever for >4 days, bilateral **non-purulent conjunctivitis**, dry cracked lips, a **polymorphous rash**, **cervical lymphadenopathy**, and extremity changes (erythema of palms/soles). - **IVIG** is the cornerstone definitive treatment for Kawasaki disease, administered to reduce the risk of potentially life-threatening **coronary artery aneurysms** from approximately 25% to under 5% when given within the first 10 days of illness. *High-dose aspirin 80-100 mg/kg/day until fever settles* - **Aspirin** is an important part of Kawasaki disease treatment for its **anti-inflammatory** (high dose initially) and **anti-platelet** (low dose later) effects, but it is not sufficient as a standalone definitive therapy. - It is used **adjunctively with IVIG**; aspirin alone does not adequately prevent the development of coronary artery aneurysms. *Intravenous ceftriaxone 80 mg/kg/day for 7 days* - This is an **antibiotic** regimen typically used for serious bacterial infections. The constellation of symptoms (mucocutaneous findings, prominent inflammation) points strongly towards a **vasculitic process** rather than a bacterial infection. - Administering antibiotics would delay the necessary immunomodulatory treatment for **Kawasaki disease**, which is not caused by bacteria. *Oral prednisolone 2 mg/kg/day for 5 days* - **Corticosteroids** are sometimes used in Kawasaki disease, particularly in high-risk patients or those who are **refractory** to initial IVIG therapy. - However, they are generally not considered first-line definitive treatment and are used as an **adjunct** rather than a primary therapy to prevent coronary artery damage. *Supportive care with fluids and antipyretics only* - **Kawasaki disease** is a serious systemic vasculitis that requires specific intervention to prevent severe cardiac complications, including **coronary artery aneurysms** and myocardial infarction. - Relying solely on **supportive care** would leave the child at high risk for irreversible cardiac damage and is therefore inappropriate as definitive management.

Question 96: A 7-year-old boy with known moderate persistent asthma on beclometasone 400 micrograms twice daily and salmeterol presents with an acute severe exacerbation. He has received back-to-back salbutamol nebulisers with oxygen and oral prednisolone 30mg. After 15 minutes his oxygen saturation remains 90% in high-flow oxygen, respiratory rate is 44/min, heart rate 148/min, and he can only speak 2-3 words at a time. Chest examination shows poor air entry bilaterally with no wheeze audible. What is the single most important immediate next step?

A. Arrange immediate intubation and mechanical ventilation
B. Administer intravenous magnesium sulphate 40 mg/kg over 20 minutes
C. Add ipratropium bromide 250 micrograms to nebuliser and repeat salbutamol
D. Commence aminophylline infusion after loading dose
E. Request immediate senior paediatric and anaesthetic review (Correct Answer)

Explanation: ***Request immediate senior paediatric and anaesthetic review***- The child exhibits **life-threatening asthma** features, specifically a **'silent chest'** (poor air entry/no wheeze) and persistent **hypoxia** (SpO2 90%), indicating impending respiratory failure.- Standard emergency protocols dictate that for any child with life-threatening features not responding to initial treatment, **immediate senior support** is the priority to manage potential airway intervention and intensive care.*Arrange immediate intubation and mechanical ventilation*- While this may be required, it is a high-risk procedure in asthma due to **dynamic hyperinflation** and should only be performed by senior experts.- Clinical stabilization with **intravenous bronchodilators** is typically attempted first unless there is an absolute respiratory arrest, and the decision for intubation should be made by senior personnel.*Administer intravenous magnesium sulphate 40 mg/kg over 20 minutes*- **IV Magnesium** is an appropriate second-line treatment for severe asthma that does not respond to nebulizers, but it does not take precedence over securing **senior help** in a life-threatening scenario.- This pharmacological intervention is part of the escalation of care that should occur concurrently with or after **expert review**.*Add ipratropium bromide 250 micrograms to nebuliser and repeat salbutamol*- Adding **ipratropium bromide** is standard in acute severe asthma, but the presence of a **silent chest** suggests the patient has surpassed the level where nebulized therapy alone is sufficient.- Relying solely on nebulizers at this stage delays the necessary **parenteral management** and critical care involvement required for a failing patient.*Commence aminophylline infusion after loading dose*- **Aminophylline** is generally considered a third-line agent and has a narrow therapeutic index with significant **side effects** like arrhythmias.- It should only be initiated in a high-dependency setting after **senior clinicians** have assessed the patient and potentially tried IV magnesium first.

Question 97: A 4-year-old girl presents with a 3-day history of fever to 39.8°C, lethargy, and reduced oral intake. She has no cough, rash, or diarrhoea. On examination, she is pale and lethargic but rousable. Temperature is 39.2°C, heart rate 156/min, respiratory rate 28/min, blood pressure 95/55 mmHg, capillary refill time 4 seconds centrally. Chest is clear, abdomen is soft with no organomegaly. There is no neck stiffness or photophobia, and no rash. Urine dipstick shows leukocytes ++, nitrites +, blood +. Blood tests show: Hb 108 g/L, WCC 18.2 × 10⁹/L (neutrophils 15.1), platelets 456 × 10⁹/L, CRP 142 mg/L. What is the most appropriate immediate management?

A. Oral trimethoprim for 3 days and discharge with outpatient follow-up
B. Intravenous ceftriaxone after blood and urine cultures, with admission for monitoring (Correct Answer)
C. Oral amoxicillin for 7 days with outpatient review in 48 hours
D. Arrange urgent renal ultrasound before commencing antibiotics
E. Lumbar puncture followed by intravenous ceftriaxone

Explanation: ***Intravenous ceftriaxone after blood and urine cultures, with admission for monitoring*** - The patient exhibits features of **pyelonephritis** (high fever, high CRP, positive nitrites/leukocytes) alongside signs of **systemic compromise** such as lethargy, tachycardia, and a **capillary refill time of 4 seconds**. - This presentation necessitates urgent management with **intravenous antibiotics** (like ceftriaxone) after obtaining cultures, and **hospital admission** for close monitoring due to potential sepsis. *Oral trimethoprim for 3 days and discharge with outpatient follow-up* - **Oral trimethoprim** is inadequate for a child presenting with signs of **systemic infection** and potential sepsis, as it would not achieve sufficient blood levels quickly enough. - Discharging a lethargic child with **prolonged capillary refill time** and high fever is dangerous, as they require inpatient monitoring and supportive care. *Oral amoxicillin for 7 days with outpatient review in 48 hours* - **Oral amoxicillin** is insufficient for severe infections like pyelonephritis with systemic compromise, as intravenous therapy ensures rapid and effective drug delivery. - An **outpatient review in 48 hours** is an unacceptable delay for a child with signs of evolving sepsis, where clinical deterioration can be rapid. *Arrange urgent renal ultrasound before commencing antibiotics* - Delaying antibiotic administration for imaging in a child with suspected **urosepsis** or severe infection is inappropriate and can worsen outcomes. - While a **renal ultrasound** may be indicated to investigate underlying abnormalities, it should be performed after initiating definitive antibiotic treatment and stabilizing the patient. *Lumbar puncture followed by intravenous ceftriaxone* - There are no clinical signs of **meningitis** (such as neck stiffness or photophobia), and the strong evidence for a urinary tract infection makes a lumbar puncture unnecessary as an immediate step. - The priority is to treat the identified source of infection (UTI) with appropriate antibiotics, rather than pursuing investigations for a less likely diagnosis at this stage.

Question 98: A 6-month-old infant is brought to the emergency department with a 6-hour history of fever to 38.6°C and increased work of breathing. The infant was born at term with no complications and is fully immunized. On examination, respiratory rate is 64/min, heart rate 168/min, temperature 38.4°C, oxygen saturation 91% in air. There is nasal flaring, subcostal and intercostal recession, and bilateral fine inspiratory crackles. The infant appears lethargic with reduced feeding. Capillary refill time is 3 seconds. What is the most appropriate immediate management priority?

A. Commence supplemental oxygen to maintain oxygen saturation >92% (Correct Answer)
B. Administer intravenous antibiotics after blood cultures
C. Perform chest X-ray to confirm diagnosis
D. Commence nasogastric feeding to maintain hydration
E. Administer nebulised salbutamol

Explanation: ***Commence supplemental oxygen to maintain oxygen saturation >92%*** - The infant's oxygen saturation of **91%** indicates **hypoxia**, making supplemental oxygen the most immediate life-saving intervention to improve tissue oxygenation. - Following the **ABC (Airway, Breathing, Circulation)** principles, addressing compromised breathing and oxygenation is the highest priority in a critically unwell child. *Administer intravenous antibiotics after blood cultures* - While **fever**, **lethargy**, and **elevated heart rate** suggest a possible infection, correcting life-threatening **hypoxia** takes immediate precedence over starting antibiotics. - **Blood cultures** and **antibiotics** are crucial but are secondary steps after securing the patient's immediate respiratory stability. *Perform chest X-ray to confirm diagnosis* - A **chest X-ray** is a diagnostic tool and should not delay initiating urgent, **life-saving interventions** like oxygen therapy in an infant with significant respiratory distress. - Clinical assessment often guides initial management, and an X-ray may not be immediately necessary, especially in typical cases of **bronchiolitis**. *Commence nasogastric feeding to maintain hydration* - While the infant has **reduced feeding** and signs of poor perfusion (prolonged capillary refill), commencing feeding in an infant with a **respiratory rate of 64/min** poses a high risk of **aspiration**. - Respiratory stabilization must be achieved first to reduce the risk of aspiration and ensure the infant can safely tolerate feeding, with **intravenous fluids** being an alternative for hydration if necessary. *Administer nebulised salbutamol* - **Nebulised salbutamol** is generally not recommended for infants under 12 months with suspected **bronchiolitis** as evidence for its efficacy is poor and it can cause adverse effects like **tachycardia**. - The clinical presentation with **fine inspiratory crackles** is more consistent with **bronchiolitis** or **pneumonia**, for which bronchodilators are not a primary treatment.

Question 99: A 2-year-old boy is brought to the emergency department following a generalized tonic-clonic seizure lasting 8 minutes at home. He has had a fever of 39.7°C for 12 hours. On arrival, the seizure has stopped and he is drowsy but responsive to voice. Capillary blood glucose is 5.2 mmol/L. Temperature is 39.1°C, heart rate 152/min, respiratory rate 36/min, oxygen saturation 97% in air. He has mildly inflamed tonsils and clear chest. There is no rash, photophobia, or neck stiffness. He has no previous history of seizures. Which of the following features makes this a complex febrile seizure?

A. Age less than 3 years
B. Duration of seizure greater than 5 minutes (Correct Answer)
C. Temperature greater than 39°C
D. Presence of tonsillitis as the febrile source
E. Post-ictal drowsiness

Explanation: ***Duration of seizure greater than 5 minutes***- A seizure duration of **8 minutes** exceeds the common 5-minute threshold often used to define a **prolonged febrile seizure**, which is a feature categorizing it as **complex** rather than simple.- While some classifications strictly define complex as >15 minutes, durations between **5 and 15 minutes** are frequently considered prolonged, necessitating closer evaluation and classifying the event as complex due to its extended nature.*Age less than 3 years*- The typical age range for **febrile seizures** is **6 months to 5 years**, making a 2-year-old child fall within the expected demographic.- **Age** within this range does not, by itself, classify a febrile seizure as complex; it merely indicates susceptibility.*Temperature greater than 39°C*- **High fever** (typically above 38°C or 39°C) is the defining trigger for all **febrile seizures**, whether simple or complex.- The **absolute height** of the temperature does not differentiate between simple and complex febrile seizures.*Presence of tonsillitis as the febrile source*- The presence of an identifiable **extracranial source of fever** (like tonsillitis) is a prerequisite for diagnosing a febrile seizure, ruling out **intracranial infection**.- The **source of fever** does not contribute to the classification of the febrile seizure as simple or complex.*Post-ictal drowsiness*- **Post-ictal drowsiness** is a common and **normal physiological response** following a generalized seizure as the brain recovers.- While **prolonged** or **focal post-ictal deficits** (e.g., Todd's paralysis) would indicate a complex seizure, simple drowsiness is an expected finding and not a criterion for complexity.

Question 100: A 5-year-old girl with known asthma presents to the emergency department with wheeze and breathlessness. She has been using her salbutamol inhaler every 2 hours for the past 6 hours with minimal improvement. On examination, she is speaking in short phrases, heart rate 135/min, respiratory rate 42/min, oxygen saturation 92% in air. She has widespread expiratory wheeze and mild subcostal recession. She receives three doses of salbutamol via nebuliser with oxygen and oral prednisolone. After 1 hour, her respiratory rate is 38/min, oxygen saturation 94% in air, and she is speaking in sentences. What is the most appropriate next step in her management?

A. Add intravenous magnesium sulphate
B. Commence intravenous salbutamol infusion
C. Continue salbutamol nebulisers 4-hourly and plan discharge in 4 hours
D. Add ipratropium bromide nebulisers and admit for observation (Correct Answer)
E. Arrange immediate transfer to paediatric intensive care

Explanation: ***Add ipratropium bromide nebulisers and admit for observation***- The patient initially presented with **acute severe asthma** (HR >125, RR >40, speaking in short phrases) and remains clinically significant with **persistent tachypnoea** and borderline saturations despite initial management.- British Thoracic Society (BTS/SIGN) guidelines recommend adding **ipratropium bromide** to salbutamol nebulisers for children with severe or poor response to initial beta-2 agonists; **admission** is necessary for ongoing monitoring.*Add intravenous magnesium sulphate*- This treatment is reserved for children with **life-threatening asthma** or those with severe asthma who fail to respond to multiple inhaled treatments and **IV salbutamol**.- The patient is currently stable and showing signs of slow improvement, so escalation to **IV magnesium** is not yet indicated.*Commence intravenous salbutamol infusion*- **IV salbutamol** is indicated in patients with **life-threatening features** or severe asthma that is refractory to initial nebulised therapy and ipratropium.- It requires **continuous ECG monitoring** and is a more invasive step than the current clinical picture warrants.*Continue salbutamol nebulisers 4-hourly and plan discharge in 4 hours*- Early discharge is inappropriate as the patient still meets criteria for **severe asthma** due to a high respiratory rate (38/min) and suboptimal **oxygen saturations** (94%).- Guidelines necessitate a period of stability, typically requiring **maintained oxygen saturations >94%** and a longer interval between bronchodilator doses before considering discharge.*Arrange immediate transfer to paediatric intensive care*- **PICU transfer** is reserved for patients with nearing **respiratory failure**, exhaustion, silent chest, or life-threatening asthma not responding to maximal medical therapy.- This child is currently improving (speaking in sentences), making **intensive care** escalation unnecessary at this stage.

Question 101: A 15-month-old child presents with a 48-hour history of fever to 39.4°C and irritability. On examination, the tympanic membranes appear red and bulging bilaterally. The child is alert and interactive with no signs of serious illness. Throat appears normal with no exudate. There is no rash or neck stiffness. Heart rate is 140/min, respiratory rate 32/min, and oxygen saturation 98% in air. What is the most appropriate initial management?

A. Prescribe amoxicillin 40 mg/kg/day in three divided doses for 5 days
B. Arrange urgent blood cultures and commence IV ceftriaxone
C. Advise regular analgesia and review if symptoms persist beyond 72 hours (Correct Answer)
D. Prescribe azithromycin for 3 days
E. Refer urgently to ENT for myringotomy

Explanation: ***Advise regular analgesia and review if symptoms persist beyond 72 hours*** - For most children with **acute otitis media (AOM)** who are systemically well, a **watchful waiting** approach or a **delayed prescription** is recommended, as most cases resolve spontaneously. - Current guidelines emphasize the use of **paracetamol** or **ibuprofen** for pain management while monitoring for deterioration over 2-3 days. *Prescribe amoxicillin 40 mg/kg/day in three divided doses for 5 days* - Immediate antibiotics are generally reserved for children under 2 years with **bilateral AOM**, those with **otorrhoea**, or those who are **systemically unwell**. - Even when indicated, the standard high-dose regimen for amoxicillin in AOM is typically **80-90 mg/kg/day** to cover resistant Streptococcus pneumoniae. *Arrange urgent blood cultures and commence IV ceftriaxone* - This invasive management is for **sepsis** or bacterial meningitis, which is ruled out by the child's **alert and interactive** state and lack of neck stiffness. - Hospital admission and **parenteral antibiotics** are only necessary if there are signs of **mastoiditis** or other serious complications. *Prescribe azithromycin for 3 days* - **Macrolides** like azithromycin are considered second-line therapy and are mostly reserved for patients with a **true penicillin allergy**. - Like amoxicillin, immediate use is not indicated in this case as the child does not meet the criteria for urgent antibiotic treatment. *Refer urgently to ENT for myringotomy* - **Myringotomy** is a surgical procedure reserved for cases of **intractable pain**, treatment failure, or severe complications like facial nerve paralysis. - It is not an initial management step for uncomplicated, **bilateral red and bulging membranes** in a stable child.

Question 102: A 9-year-old boy with known asthma attends clinic for review. He uses his salbutamol inhaler 2-3 times per week for symptom relief and wakes once per week with cough. He is on beclometasone 200 micrograms twice daily via a metered-dose inhaler. Examination reveals normal chest sounds and good technique with his inhaler. What is the most appropriate next step in his asthma management according to current UK guidelines?

A. Add montelukast as an additional controller therapy
B. Increase beclometasone to 400 micrograms twice daily
C. Add long-acting beta-agonist (LABA) therapy (Correct Answer)
D. Switch to combination ICS/LABA inhaler
E. Continue current management and review in 3 months

Explanation: ***Add long-acting beta-agonist (LABA) therapy*** - The patient's symptoms (salbutamol 2-3 times/week, nocturnal cough once/week) indicate **uncontrolled asthma** despite being on a moderate dose of **inhaled corticosteroid (ICS)** (beclometasone 200 micrograms twice daily). - According to current UK guidelines (**BTS/SIGN**) for children aged 5-16, the most appropriate next step for poorly controlled asthma on a moderate dose ICS is to **add a long-acting beta-agonist (LABA)**. *Add montelukast as an additional controller therapy* - **Montelukast** (a **leukotriene receptor antagonist**) is typically considered if a **LABA** is not tolerated, is contraindicated, or if the patient continues to have uncontrolled symptoms after a trial of LABA. - It is not usually the preferred first add-on therapy after an ICS in this specific stepwise management of pediatric asthma. *Increase beclometasone to 400 micrograms twice daily* - Increasing the **ICS dose** significantly before adding a **LABA** is not the recommended next step in the stepwise management of pediatric asthma. - Escalating to a higher dose of ICS first carries an increased risk of **systemic side effects**, such as potential **growth suppression**, without necessarily providing optimal symptom control compared to adding a LABA. *Switch to combination ICS/LABA inhaler* - While the eventual goal might be a combination inhaler, the initial step in the guidelines is often to *add* a separate **LABA** to the existing ICS to assess the response to the new class of medication. - A direct switch to a combination inhaler often comes later, for instance, if the individual LABA is effective and convenience is desired, or as part of a **MART (Maintenance and Reliever Therapy)** regimen which has specific criteria. *Continue current management and review in 3 months* - Continuing the current management is inappropriate as the patient exhibits clear signs of **uncontrolled asthma**, including frequent reliever use and nocturnal symptoms. - Delaying treatment escalation would leave the child at continued risk of **asthma exacerbations**, **sleep disturbance**, and impaired quality of life due to persistent symptoms.

Question 103: A 3-year-old boy with recurrent wheeze is prescribed a salbutamol inhaler with a spacer device for symptom relief. His parents ask about the correct technique for administering inhaled medication via spacer. Which of the following represents the recommended number of breaths the child should take from the spacer after each actuation?

A. 10 breaths
B. 2 breaths
C. 3 breaths
D. 5 breaths (Correct Answer)
E. 7 breaths

Explanation: ***5 breaths*** - For young children, the recommended technique involves taking **five tidal breaths** after each single actuation to ensure effective delivery of the medication to the small airways. - This method optimizes **drug deposition** in the lungs while being realistic and achievable for a 3-year-old child to perform during an acute episode. *2 breaths* - Taking only two breaths is generally **insufficient** for a young child using a spacer to inhale the full dose of the medication. - This shorter duration increases the risk of **sub-optimal drug delivery**, potentially failing to resolve the wheeze effectively. *3 breaths* - While slightly closer to the goal, three breaths are still below the clinical standard required for **adequate ventilation** of the spacer chamber. - Pediatric guidelines consistently recommend a minimum of **five breaths** to ensure the medication is not left suspended in the device. *7 breaths* - Recommending seven breaths is unnecessary as clinical evidence shows that **maximum medication extraction** is typically achieved within the first five breaths. - Extending the process can lead to **poor compliance** or increased distress in a young child who is already experiencing respiratory difficulty. *10 breaths* - Although taking ten breaths is not harmful, it is **excessive** and does not provide additional therapeutic benefit over five breaths. - For a toddler, maintaining a seal for ten breaths may be **physically challenging**, making the administration process unnecessarily long and difficult for parents.

Question 104: An 8-month-old infant presents to the emergency department with a 12-hour history of fever of 38.9°C and parental concern about reduced responsiveness. On examination, the infant is lethargic but rousable, has a non-blanching petechial rash on the trunk (4 lesions, each <2mm), temperature 38.7°C, heart rate 165 bpm, respiratory rate 48/min, capillary refill time 3 seconds centrally. Blood glucose is 4.2 mmol/L. What is the single most appropriate immediate management?

A. Obtain blood cultures, perform lumbar puncture, then administer IV ceftriaxone 80 mg/kg
B. Administer intramuscular benzylpenicillin 300 mg immediately then arrange urgent transfer
C. Commence fluid resuscitation with 20 ml/kg 0.9% sodium chloride then administer IV ceftriaxone
D. Administer IV ceftriaxone 80 mg/kg immediately, then perform investigations (Correct Answer)
E. Contact paediatric intensive care for retrieval and await their arrival before starting treatment

Explanation: ***Administer IV ceftriaxone 80 mg/kg immediately, then perform investigations*** - In an infant with **fever**, **lethargy**, and a **non-blanching petechial rash**, **meningococcal sepsis** is highly suspected, requiring immediate administration of **IV antibiotics**. - Clinical guidelines emphasize that **antibiotic administration** must not be delayed for investigations like blood cultures or lumbar puncture when severe bacterial infection is suspected. *Obtain blood cultures, perform lumbar puncture, then administer IV ceftriaxone 80 mg/kg* - **Lumbar puncture** is contraindicated or should be deferred in a child with signs of **circulatory compromise** (prolonged CRT, tachycardia) due to the risk of herniation or clinical deterioration. - Delaying **antibiotics** to obtain blood cultures is not acceptable in this emergency, as prompt treatment significantly impacts outcome. *Administer intramuscular benzylpenicillin 300 mg immediately then arrange urgent transfer* - **Intramuscular benzylpenicillin** is appropriate for **pre-hospital** management of suspected meningococcal disease to minimize delay before hospital arrival. - As the infant is already in the emergency department, **IV ceftriaxone** is the preferred and more effective immediate intervention. *Commence fluid resuscitation with 20 ml/kg 0.9% sodium chloride then administer IV ceftriaxone* - While the infant shows signs of **shock** (prolonged CRT), the **absolute priority** in suspected meningococcal sepsis is the immediate administration of **antibiotics**. - **Fluid resuscitation** should be initiated concurrently with or immediately following the first dose of antibiotics, not as a preceding step that delays antimicrobial therapy. *Contact paediatric intensive care for retrieval and await their arrival before starting treatment* - Delaying life-saving **antibiotics** and initial stabilization while waiting for **PICU retrieval** is unacceptable and significantly increases morbidity and mortality risk. - The initial emergency management, including **antibiotics**, must be initiated by the treating team without delay.

Question 105: A 3-year-old boy with recurrent viral-induced wheeze presents to the emergency department with acute breathlessness and wheeze. His mother reports this is his fourth episode in the past year. He has been started on salbutamol inhaler via spacer with 8 puffs given, and symptoms have partially improved. Observations now show: respiratory rate 32/min, heart rate 118 bpm, oxygen saturation 96% in air. He can speak in full sentences. What is the most appropriate next step regarding his ongoing management plan?

A. Start regular inhaled corticosteroid beclometasone 100 micrograms twice daily
B. Prescribe oral montelukast 4 mg once daily as preventer therapy (Correct Answer)
C. Continue salbutamol as required only and provide written asthma action plan
D. Start combination inhaled corticosteroid and long-acting beta-agonist therapy
E. Arrange skin prick allergy testing before deciding on preventer therapy

Explanation: ***Prescribe oral montelukast 4 mg once daily as preventer therapy*** - For preschool children (under 5) with frequent **viral-induced wheeze**, a leukotriene receptor antagonist (**LTRA**) like montelukast is the first-line preventer therapy according to **BTS/SIGN guidelines**. - This patient warrants a 4-8 week trial of **montelukast** due to the frequency of symptoms (four episodes in one year) to reduce the inflammatory response triggered by viral infections. *Start regular inhaled corticosteroid beclometasone 100 micrograms twice daily* - **Inhaled corticosteroids (ICS)** are the first-line preventer for children with **multiple-trigger wheeze** or clinical features of asthma, rather than purely episodic viral wheeze. - Evidence suggests that ICS are less effective than **LTRAs** for managing wheezing that occurs exclusively during **viral upper respiratory infections** in preschool children. *Continue salbutamol as required only and provide written asthma action plan* - While a written action plan is vital, management with **SABA** alone is insufficient for a child experiencing **recurrent episodes** (four per year) that impact clinical stability. - Relying solely on **rescue medication** fails to address the underlying inflammatory pathway responsible for the frequency of these exacerbations. *Start combination inhaled corticosteroid and long-acting beta-agonist therapy* - **LABA** therapy is not recommended for preschool children under five and must never be prescribed without concurrent **inhaled corticosteroids**. - Stepping up to combination therapy is reserved for older children with persistent **asthma symptoms** that are poorly controlled on standard dose steroids. *Arrange skin prick allergy testing before deciding on preventer therapy* - **Skin prick testing** identifies atopy but does not alter the immediate pharmacological management of **episodic viral wheeze** in a 3-year-old. - Preventer therapy is initiated based on **clinical frequency** and severity of wheezing episodes rather than the presence of specific allergic sensitizations.

Question 106: A 4-year-old girl presents with a 4-day history of high fever up to 39.8°C, sore throat, and difficulty swallowing. She is drooling and sitting leaning forward. On examination, she appears toxic, has inspiratory stridor, temperature 39.5°C, respiratory rate 38/min, heart rate 148 bpm, oxygen saturation 96% in air. There is no rash. She is fully immunised including Haemophilus influenzae type b vaccine. What is the most appropriate immediate action?

A. Examine the throat with tongue depressor and take throat swab
B. Contact senior paediatric and anaesthetic teams urgently and keep child calm (Correct Answer)
C. Administer nebulised adrenaline 5 ml of 1:1000
D. Lay the child flat and obtain intravenous access for blood tests
E. Administer intramuscular benzylpenicillin immediately

Explanation: ***Contact senior paediatric and anaesthetic teams urgently and keep child calm***- The clinical presentation of **high fever**, **drooling**, and **tripod positioning** is highly suggestive of **acute epiglottitis**, a life-threatening airway emergency.- Immediate involvement of **senior anaesthetic and paediatric teams** is critical to secure the airway in a controlled environment (e.g., operating theatre) before total obstruction occurs.*Examine the throat with tongue depressor and take throat swab*- Attempting to visualize the throat with a **tongue depressor** is strictly contraindicated as it can precipitate **reflex laryngospasm** and complete airway collapse.- Clinical examination should be deferred until the airway is stabilized by specialists equipped for **emergency intubation**.*Administer nebulised adrenaline 5 ml of 1:1000*- **Nebulised adrenaline** is the treatment for **croup** (laryngotracheobronchitis), not epiglottitis, and may be ineffective here.- Administering a nebuliser may **distress the child**, increasing the risk of sudden airway obstruction.*Lay the child flat and obtain intravenous access for blood tests*- **Lying the child flat** can lead to immediate airway occlusion in patients with epiglottitis; they must be allowed to remain in their **position of comfort**.- Painful procedures like **IV access** should be avoided until the airway is secured, as distress can trigger fatal **airway closure**.*Administer intramuscular benzylpenicillin immediately*- While antibiotics are necessary, they are secondary to **airway management** and should not delay the mobilization of the resuscitation team.- **Benzylpenicillin** is the empirical treatment for suspected meningococcal septicemia, but this patient's symptoms point toward **upper airway obstruction** rather than meningitis.

Question 107: A 9-month-old infant with a 3-day history of coryzal symptoms and cough is brought to the emergency department with increased work of breathing. On examination, respiratory rate is 65/min, heart rate 155 bpm, temperature 37.9°C, oxygen saturation 91% in air. There is subcostal and intercostal recession, nasal flaring, and bilateral fine inspiratory crackles with scattered wheeze throughout both lung fields. The infant is feeding approximately 50% of normal volume. What is the most appropriate initial management?

A. Commence oxygen therapy via nasal cannulae to maintain saturations ≥92% and observe feeding (Correct Answer)
B. Administer nebulised salbutamol and reassess response after 20 minutes
C. Administer nebulised hypertonic saline 3% and reassess in 30 minutes
D. Start oral prednisolone 1 mg/kg for 3 days
E. Commence intravenous fluids and nil by mouth

Explanation: ***Commence oxygen therapy via nasal cannulae to maintain saturations ≥92% and observe feeding***- The clinical presentation of a **9-month-old infant** with coryzal symptoms, crackles, and wheeze is diagnostic of **bronchiolitis**.- According to **NICE guidelines**, supplemental **oxygen therapy** is indicated as the first-line intervention when saturations are persistently **below 92%**.*Administer nebulised salbutamol and reassess response after 20 minutes*- **Bronchodilators** like salbutamol are not recommended in the management of bronchiolitis as the pathophysiology involves **airway edema** rather than smooth muscle bronchospasm.- Clinical trials have shown no significant improvement in **respiratory distress** or duration of hospital stay with the use of beta-2 agonists.*Administer nebulised hypertonic saline 3% and reassess in 30 minutes*- While **nebulised hypertonic saline** may be used in some inpatient protocols, it is not recommended for **initial emergency management** by current clinical guidelines.- Evidence regarding its efficacy in reducing **admission rates** or length of stay remains inconsistent and lower priority than oxygenation.*Start oral prednisolone 1 mg/kg for 3 days*- **Corticosteroids** (oral or inhaled) have no proven benefit in infants with bronchiolitis and are not recommended for routine use.- Unlike asthma, the inflammation in bronchiolitis does not respond effectively to **steroid therapy**.*Commence intravenous fluids and nil by mouth*- Infants should receive **nasogastric (NG) or intravenous fluids** only if they are unable to maintain adequate hydration (typically **<50% or 75%** of normal intake).- Since this infant is still feeding **50% of normal volume**, the clinical priority remains **oxygenation and close observation** before escalating to invasive fluid management.

Question 108: A 14-month-old child is brought to the emergency department with a 6-day history of fever ranging from 38.5-40.3°C. The parents report the child has been irritable but otherwise has no specific symptoms. On examination, the child has a temperature of 39.8°C, bilateral non-purulent conjunctivitis, cracked red lips, a polymorphous rash on the trunk, and cervical lymphadenopathy. Heart rate is 145 bpm, respiratory rate 32/min, capillary refill time 2 seconds. What is the most important initial investigation to perform?

A. Blood culture, full blood count, and C-reactive protein (Correct Answer)
B. Echocardiogram to assess for coronary artery abnormalities
C. Lumbar puncture to exclude meningitis
D. Throat swab for bacterial culture
E. Viral PCR panel including adenovirus and enterovirus

Explanation: ***Blood culture, full blood count, and C-reactive protein*** - In a child presenting with prolonged fever and several features suggestive of **Kawasaki disease** (conjunctivitis, cracked lips, rash, lymphadenopathy), initial laboratory tests are crucial to assess **inflammation** (elevated CRP/ESR) and to rule out **bacterial sepsis** through blood cultures. - A **full blood count (FBC)** provides valuable information, often showing **leukocytosis** with neutrophilia in the acute phase, and later **thrombocytosis**, which supports the diagnosis of Kawasaki disease and helps in monitoring. *Echocardiogram to assess for coronary artery abnormalities* - While an echocardiogram is essential for detecting **coronary artery aneurysms**, the most serious complication of Kawasaki disease, it is typically performed once the diagnosis is strongly suspected or confirmed, rather than as the *initial* investigation in the emergency setting. - It should not precede or delay critical **initial blood investigations** to rule out other serious conditions like bacterial sepsis or to establish baseline inflammatory markers. *Lumbar puncture to exclude meningitis* - The child's presentation, while irritable, does not include classic **meningeal signs** like neck stiffness or photophobia, which would be primary indicators for a lumbar puncture to rule out meningitis. - The constellation of symptoms (conjunctivitis, rash, cracked lips, cervical lymphadenopathy) strongly points towards a systemic **vasculitic process** like Kawasaki disease rather than an isolated central nervous system infection. *Throat swab for bacterial culture* - A throat swab is primarily indicated for suspected **streptococcal pharyngitis** or **scarlet fever**. While scarlet fever can mimic some features of Kawasaki disease, the child's complete symptom profile (e.g., non-purulent conjunctivitis, cracked lips) is more consistent with Kawasaki. - This investigation is less critical than systemic blood work for an acutely ill child with multisystem inflammatory signs, and a negative result would not rule out Kawasaki disease. *Viral PCR panel including adenovirus and enterovirus* - While viral infections (like adenovirus) can cause fever, conjunctivitis, and rash, the specific combination of symptoms and their duration strongly points towards **Kawasaki disease**, a condition requiring urgent specific treatment. - Relying on a **viral PCR panel** as the *most important initial investigation* could delay the timely diagnosis and initiation of **intravenous immunoglobulin (IVIG)**, which is crucial for preventing cardiac complications in Kawasaki disease.

Question 109: A 6-year-old girl with asthma presents to the emergency department with acute breathlessness. She is sitting upright, unable to complete sentences, has respiratory rate 42/min, heart rate 145 bpm, oxygen saturation 91% in air, and widespread expiratory wheeze. She has received back-to-back salbutamol, nebulised ipratropium bromide, oral prednisolone 30 mg, and oxygen to maintain saturations >94%. After 45 minutes of treatment, her clinical state is unchanged. Which of the following treatment options has the strongest evidence base for improving outcomes at this stage?

A. Intravenous magnesium sulphate 40 mg/kg over 20 minutes (Correct Answer)
B. Intravenous aminophylline loading dose 5 mg/kg over 20 minutes
C. Intravenous salbutamol infusion starting at 1 microgram/kg/min
D. Subcutaneous terbutaline 10 micrograms/kg
E. High-dose inhaled corticosteroid via nebuliser

Explanation: ***Intravenous magnesium sulphate 40 mg/kg over 20 minutes*** - This child presents with **acute severe asthma** unresponsive to initial bronchodilator and steroid therapy; **intravenous magnesium sulphate** is indicated as the next step with strong evidence for reducing hospital admissions. - It acts as a **smooth muscle relaxant**, facilitating bronchodilation by inhibiting calcium influx, and is recommended by national guidelines (e.g., **BTS/SIGN**) for children failing to respond to initial inhaled therapy. *Intravenous aminophylline loading dose 5 mg/kg over 20 minutes* - While considered for **life-threatening asthma**, aminophylline has a **narrow therapeutic index** and is associated with significant side effects such as arrhythmias, seizures, and vomiting. - Evidence for its benefit over magnesium in this specific scenario is less robust, and its use requires careful **cardiac monitoring**. *Intravenous salbutamol infusion starting at 1 microgram/kg/min* - **Intravenous salbutamol** is typically reserved for patients who do not respond to intravenous magnesium or those in **peri-arrest** situations with refractory bronchospasm. - There is currently **limited evidence** to support its use as a primary add-on therapy over IV magnesium in the pediatric emergency setting. *Subcutaneous terbutaline 10 micrograms/kg* - The **subcutaneous route** is less commonly used in modern practice for acute severe asthma, as **intravenous access** is generally preferred for more consistent and reliable drug delivery. - It does not possess the strong evidence base of **intravenous magnesium sulphate** for improving outcomes in severe acute asthma at this stage. *High-dose inhaled corticosteroid via nebuliser* - The patient has already received **systemic corticosteroids** (oral prednisolone), which are the cornerstone anti-inflammatory treatment in acute severe asthma. - Adding further **inhaled corticosteroids** in the acute phase does not provide significant additional clinical benefit beyond the already administered systemic dose for reversing acute bronchospasm.

Question 110: A 3-year-old boy is brought to the GP with a 24-hour history of fever to 38.6°C and crying when passing urine. His mother reports he has been drinking well and has no vomiting or diarrhoea. On examination, he is alert and playful, temperature 38.4°C, heart rate 110 bpm, capillary refill time <2 seconds. Abdominal examination is normal. A clean-catch urine sample shows: leucocytes ++, nitrites positive, protein trace, blood negative. What is the most appropriate immediate management?

A. Send urine for microscopy and culture and start oral trimethoprim while awaiting results (Correct Answer)
B. Refer to hospital for intravenous antibiotics
C. Send urine for microscopy and culture and review when results available
D. Start oral amoxicillin and arrange follow-up in 48 hours
E. Arrange urgent renal ultrasound within 6 weeks

Explanation: ***Send urine for microscopy and culture and start oral trimethoprim while awaiting results***- This child presents with a likely **urinary tract infection (UTI)** based on positive **leucocytes and nitrites** on dipstick and clinical symptoms of **dysuria** and fever.- According to **NICE guidelines**, children with a high risk of UTI (positive dipstick) should have a urine culture sent and be started on **empirical antibiotics** like trimethoprim or nitrofurantoin immediately.*Refer to hospital for intravenous antibiotics*- Hospitalization and **IV antibiotics** are reserved for infants <3 months old or children with **signs of sepsis**, dehydration, or severe **pyelonephritis**.- This child is **clinically stable**, alert, playful, and drinking well, making outpatient oral treatment appropriate.*Send urine for microscopy and culture and review when results available*- Delaying treatment until culture results are available is inappropriate when a dipstick is **nitrite-positive**, as this indicates a high probability of bacterial infection.- Prompt treatment is necessary to resolve symptoms and reduce the risk of the infection ascending to the **renal parenchyma**.*Start oral amoxicillin and arrange follow-up in 48 hours*- **Amoxicillin** is generally not recommended as a first-line empirical choice for UTI due to high rates of **E. coli resistance**.- Guidelines favor **trimethoprim**, **nitrofurantoin**, or a cephalosporin while awaiting specific **sensitivity results** from the lab.*Arrange urgent renal ultrasound within 6 weeks*- An **ultrasound** is not an immediate management step for the acute infection and is used later to screen for **structural abnormalities**.- Routine imaging is typically reserved for children under 6 months, those with **atypical UTI**, or cases of **recurrent UTI**.

Question 111: A 5-year-old boy with known asthma on beclometasone 200 micrograms twice daily presents with an acute asthma exacerbation. He has received nebulised salbutamol with ipratropium, oral prednisolone, and oxygen therapy. Despite this, he remains lethargic with oxygen saturation 90% on 15 litres high-flow oxygen, is speaking only single words, has a respiratory rate of 48/min, and has silent chest in some areas on auscultation. What is the most appropriate next step in management?

A. Continue current management and repeat nebulisers in 20 minutes
B. Administer intravenous salbutamol infusion
C. Administer intravenous magnesium sulphate 40 mg/kg over 20 minutes
D. Request immediate senior anaesthetic review for consideration of intubation (Correct Answer)
E. Commence intravenous aminophylline loading dose followed by infusion

Explanation: ***Request immediate senior anaesthetic review for consideration of intubation*** - The patient exhibits features of **life-threatening asthma**, including **lethargy**, speaking only **single words**, **silent chest**, and persistent **hypoxia** (SpO2 90% on high-flow oxygen) despite maximal medical therapy. These are critical signs of impending **respiratory failure**. - At this stage, immediate **airway management** and **mechanical ventilation** are paramount. A **senior anaesthetic review** is crucial to prepare for and perform **intubation** and transition to **intensive care** before cardiorespiratory arrest occurs. *Continue current management and repeat nebulisers in 20 minutes* - Continuing the current management is inappropriate as the child has already demonstrated **failure to respond** to intensive bronchodilator therapy, corticosteroids, and oxygen. - The presence of **lethargy** and a **silent chest** signifies a rapidly deteriorating condition and a life-threatening emergency that demands immediate escalation, not repetition of failed treatment. *Administer intravenous salbutamol infusion* - While **intravenous salbutamol** is an escalation for severe asthma, the patient's clinical picture of **lethargy** and **silent chest** indicates imminent **respiratory collapse**, for which airway management takes precedence. - Pursuing only further pharmacotherapy without addressing the critical signs of respiratory exhaustion and impending failure can dangerously delay definitive **airway management**. *Administer intravenous magnesium sulphate 40 mg/kg over 20 minutes* - **Intravenous magnesium sulphate** is recommended for severe or life-threatening asthma refractory to initial bronchodilators, but it does not address the immediate need for **airway support** in a child showing signs of **exhaustion**. - In a patient with imminent **respiratory failure**, pharmacologic interventions should ideally be given while simultaneously preparing for **intubation** and **ventilatory support**, not as a delaying step. *Commence intravenous aminophylline loading dose followed by infusion* - **Aminophylline** is typically reserved as a later-line agent due to its narrow therapeutic index, potential for significant **toxicity** (e.g., arrhythmias, seizures), and less robust evidence for superiority over other treatments. - It is an inappropriate immediate next step in a patient exhibiting clear signs of **respiratory exhaustion** and impending failure, where the priority is rapid **airway control** and **ventilatory support**.

Question 112: A 17-month-old child presents with a 72-hour history of fever up to 40.2°C. The parents report the child has had no other symptoms except mild irritability and reduced appetite. Examination reveals an alert child with temperature 39.7°C, heart rate 155 bpm, respiratory rate 35/min, capillary refill time <2 seconds. There is no rash, no focus of infection identified, and the child appears well hydrated. Urine dipstick is negative. What is the most appropriate next management step according to NICE traffic light system?

A. Provide safety-net advice and arrange review in 24 hours
B. Admit for observation and perform blood tests including full blood count and C-reactive protein (Correct Answer)
C. Prescribe oral antibiotics and review in 48 hours if not improving
D. Perform chest radiograph to exclude occult pneumonia
E. Arrange urgent paediatric assessment within 2 hours

Explanation: ***Admit for observation and perform blood tests including full blood count and C-reactive protein*** - According to the **NICE Traffic Light System**, a fever of 40.2°C for 72 hours in a 17-month-old child, without an identifiable source, represents an **amber** feature, necessitating further investigation for **serious bacterial infection (SBI)**. - Admission allows for close observation and monitoring, while blood tests like **full blood count (FBC)** and **C-reactive protein (CRP)** are crucial initial investigations to help identify signs of occult infection. *Provide safety-net advice and arrange review in 24 hours* - This approach is typically reserved for children exhibiting only **green (low risk)** features, where a specific cause for the fever has been identified and the child appears otherwise well. - The child's persistent very high fever without a clear focus is an **amber** feature, indicating a higher risk that requires more active management than simple safety-netting and delayed review. *Prescribe oral antibiotics and review in 48 hours if not improving* - Empirical antibiotic therapy is not appropriate for a fever without a known focus unless there are clear clinical indicators strongly suggesting **bacterial infection**. - Prescribing antibiotics without a diagnosis can mask symptoms, delay appropriate management for conditions like **meningitis** or **Kawasaki disease**, and contribute to **antimicrobial resistance**. *Perform chest radiograph to exclude occult pneumonia* - A chest radiograph is generally not indicated in children with fever without a focus unless there are specific **respiratory signs** such as tachypnoea, chest indrawing, or focal crackles on auscultation. - The child in this case has a normal respiratory rate and no other signs of respiratory distress, making a chest radiograph less of an immediate priority than broader investigations for occult infection. *Arrange urgent paediatric assessment within 2 hours* - Referral for urgent paediatric assessment (within 2 hours) is reserved for children with **red (high risk)** features, such as signs of shock, non-blanching rash, altered consciousness, or significant respiratory distress. - While the child has a high fever, they are described as **alert**, well-hydrated, and have a normal **capillary refill time**, which do not meet the criteria for a red traffic light feature requiring immediate emergency assessment.

Question 113: What is the recommended time interval for administering back-to-back salbutamol inhalers via spacer device in a child presenting with acute asthma to the emergency department?

A. One puff every 30 seconds until symptoms improve
B. Two puffs every 2 minutes for three cycles
C. Two puffs every 30-60 seconds up to 10 puffs (Correct Answer)
D. One puff every minute for 10 minutes
E. Four puffs initially then two puffs every 4 minutes

Explanation: ***Two puffs every 30-60 seconds up to 10 puffs*** - According to **BTS/SIGN guidelines**, the recommended protocol for acute asthma mimics the efficacy of nebulization by delivering **metered-dose inhaler (MDI)** puffs at frequent intervals. - Administering **two puffs** (approx. 200 mcg) every **30-60 seconds** ensures rapid bronchodilation while providing the patient time to take adequate breaths through the **spacer** between actuations. *One puff every 30 seconds until symptoms improve* - Standard guidelines specify a maximum of **10 puffs** per cycle rather than an indefinite delivery until symptoms resolve. - Giving only **one puff** may result in sub-therapeutic dosing in the initial critical minutes of an acute presentation. *Two puffs every 2 minutes for three cycles* - A **2-minute interval** is unnecessarily long for initial rescue therapy in the emergency setting and delays achieving peak bronchodilation. - This frequency does not align with the standard **back-to-back delivery** model used for moderate-to-severe acute exacerbations. *One puff every minute for 10 minutes* - This approach is too slow for an **emergency presentation**, as it would take 10 minutes to deliver the same dose that can be safely given in 5 minutes. - Higher doses delivered more rapidly are preferred in the **acute phase** to stabilize the airway and reduce work of breathing. *Four puffs initially then two puffs every 4 minutes* - There is no clinical evidence supporting this specific **loading dose** and maintenance interval for pediatric acute asthma in the ED. - This regimen lacks the standardized continuous delivery of **up to 10 puffs** required for those failing to respond to initial treatment.

Question 114: A 7-month-old infant is brought to the emergency department with a 4-hour history of fever of 39.5°C and increased irritability. The infant was born at term with no complications and immunisations are up to date. On examination, the infant is crying inconsolably, has a bulging anterior fontanelle, and appears generally unwell. Temperature is 39.6°C, heart rate 170 bpm, respiratory rate 50/min, capillary refill time 2 seconds. What is the single most important immediate investigation?

A. Blood culture and full blood count
B. Lumbar puncture for cerebrospinal fluid analysis (Correct Answer)
C. Urine sample for microscopy and culture
D. Chest radiograph
E. CT scan of the head

Explanation: ***Lumbar puncture for cerebrospinal fluid analysis*** - A **bulging anterior fontanelle**, high fever, and inconsolable crying in an infant are classic red flags for **bacterial meningitis**. - **Lumbar puncture** is the definitive investigation to confirm the diagnosis and identify the **causative pathogen** to guide targeted antibiotic therapy. *Blood culture and full blood count* - These are essential components of a **sepsis screen** to check for systemic infection and bacteremia. - While they support the clinical picture, they lack the **specificity and diagnostic certainty** of CSF analysis for central nervous system infections. *Urine sample for microscopy and culture* - Testing for **urinary tract infections (UTI)** is routine in febrile infants to find a potential source of infection. - However, clinical signs like a **bulging fontanelle** point directly toward intracranial pathology, making it secondary to spinal fluid analysis. *Chest radiograph* - Indicated if there are signs of **respiratory distress** or abnormal findings on chest auscultation suggesting pneumonia. - In the absence of respiratory symptoms, it will not contribute to the diagnosis of a suspected **central nervous system infection**. *CT scan of the head* - Usually performed prior to lumbar puncture if there are signs of **raised intracranial pressure** (e.g., focal neurological deficits, significantly reduced consciousness). - In an infant with an open fontanelle, the fontanelle acts as a **pressure-release valve**, and a CT scan would only cause a dangerous delay in initiating treatment for meningitis.

Question 115: A 4-year-old girl with known asthma presents to the emergency department with wheeze and increased work of breathing. She is able to talk in short sentences. Observations show: respiratory rate 38/min, heart rate 135 bpm, oxygen saturation 93% in air. She has widespread expiratory wheeze and moderate intercostal recession. After three doses of salbutamol via spacer and oral prednisolone, her oxygen saturation remains 93% and she still has moderate work of breathing. What is the most appropriate next step in management?

A. Change to nebulised salbutamol 2.5 mg
B. Add nebulised ipratropium bromide 250 micrograms (Correct Answer)
C. Continue salbutamol via spacer every 20 minutes and reassess
D. Commence intravenous magnesium sulphate infusion
E. Request senior review for consideration of intravenous aminophylline

Explanation: ***Add nebulised ipratropium bromide 250 micrograms***- This patient presents with features of **acute severe asthma** (SaO2 93%, tachycardia, tachypnoea, moderate intercostal recession) that has not improved after initial **salbutamol** via spacer and **oral prednisolone**.- According to guidelines (e.g., BTS/SIGN), adding an anticholinergic like **ipratropium bromide** to nebulised beta-agonists is the next recommended step for severe asthma attacks or those poorly responding to initial treatment.*Change to nebulised salbutamol 2.5 mg*- While transitioning to **nebulised delivery** of salbutamol is appropriate for severe asthma, simply switching the delivery method without adding **ipratropium bromide** is insufficient for a poor responder.- The combined use of **salbutamol and ipratropium bromide** offers synergistic bronchodilation and is indicated when initial salbutamol alone is inadequate.*Continue salbutamol via spacer every 20 minutes and reassess*- The patient has already received three doses of salbutamol via spacer and oral steroids, with persistent **hypoxia (SaO2 93%)** and **moderate work of breathing**.- Continuing the same regimen without escalation risks further deterioration and delays more effective management for a severe, non-improving asthma attack.*Commence intravenous magnesium sulphate infusion*- **Intravenous magnesium sulphate** is typically reserved for children with **life-threatening asthma** or those with severe asthma refractory to combined nebulised therapy.- It is a **second-line parenteral** treatment and is usually considered after nebulised beta-agonists and anticholinergics have failed to achieve adequate response.*Request senior review for consideration of intravenous aminophylline*- **Intravenous aminophylline** is a later-line treatment, generally considered for patients in **intensive care** or those with severe or life-threatening asthma who have not responded to multiple other treatments.- It has a narrow **therapeutic index** and significant side effects, making it a treatment of last resort after other therapies have been exhausted.

Question 116: A 13-month-old infant presents with a 2-day history of coryzal symptoms and low-grade fever. Today the parents noticed inspiratory stridor that worsens when the child cries. The child is alert, playing, and able to drink normally. Temperature is 37.8°C, respiratory rate 32/min, heart rate 115 bpm, oxygen saturation 98% in air. There is mild subcostal recession and occasional inspiratory stridor at rest. What is the most appropriate immediate management?

A. Oral dexamethasone 0.15 mg/kg as a single dose (Correct Answer)
B. Nebulised budesonide 2 mg
C. Nebulised adrenaline 5 ml of 1:1000 solution
D. Oral prednisolone 1 mg/kg for 3 days
E. Intramuscular adrenaline 0.01 mg/kg of 1:1000 solution

Explanation: ***Oral dexamethasone 0.15 mg/kg as a single dose*** - This child has **croup** (laryngotracheobronchitis), and clinical guidelines recommend a single dose of **oral dexamethasone** for all children presenting with any degree of severity. - A dose of **0.15 mg/kg** is effective in reducing laryngeal edema and the need for further hospital intervention or repeat visits. *Nebulised budesonide 2 mg* - This is an alternative treatment used if the child is **unable to tolerate** oral medications or if they are vomiting. - It is not the first-line choice when the child is **alert and drinking normally**, as oral administration is less distressing. *Nebulised adrenaline 5 ml of 1:1000 solution* - Reserved for **moderate to severe croup** where there is significant respiratory distress or impending airway obstruction. - It provides rapid but **temporary relief** of symptoms and must always be followed by steroid administration. *Oral prednisolone 1 mg/kg for 3 days* - While prednisolone is an alternative steroid, a **single dose** of dexamethasone is preferred due to its **longer half-life**. - A **3-day course** is generally unnecessary for mild croup, as the symptoms usually peak and resolve quickly after a single steroid dose. *Intramuscular adrenaline 0.01 mg/kg of 1:1000 solution* - This is the emergency treatment for **anaphylaxis**, which presents with wheeze, urticaria, or angioedema rather than isolated stridor. - It has no role in the management of **viral croup** unless there is a complete airway emergency where nebulization is impossible.

Question 117: A 2-year-old boy presents to the emergency department with a 6-hour history of fever of 39.8°C. His mother reports he has been irritable and refusing to eat. On examination, he has a capillary refill time of 4 seconds, heart rate 165 bpm, respiratory rate 45/min, and blood pressure 85/50 mmHg. His peripheries are cool and mottled. What is the most appropriate initial fluid bolus management?

A. 10 ml/kg 0.9% sodium chloride over 10 minutes
B. 20 ml/kg 0.9% sodium chloride over 10-15 minutes (Correct Answer)
C. 10 ml/kg 4.5% human albumin solution over 30 minutes
D. 20 ml/kg 0.45% sodium chloride with 5% dextrose over 20 minutes
E. 15 ml/kg Hartmann's solution over 60 minutes

Explanation: ***20 ml/kg 0.9% sodium chloride over 10-15 minutes*** - The child's clinical presentation (prolonged **capillary refill time**, **tachycardia**, **tachypnea**, **hypotension**, and **cool, mottled peripheries**) indicates **septic shock**, necessitating rapid **volume expansion**. - Guidelines for pediatric shock management recommend an initial bolus of **20 ml/kg** of an **isotonic crystalloid** like **0.9% sodium chloride**, administered rapidly over **5-15 minutes**. *10 ml/kg 0.9% sodium chloride over 10 minutes* - While 0.9% sodium chloride is appropriate, a **10 ml/kg** bolus is generally considered **insufficient** for initial resuscitation in a child with signs of **uncompensated shock**. - This smaller volume might be considered for patients at high risk of **fluid overload**, such as those with underlying **cardiac or renal disease**, which is not evident here. *10 ml/kg 4.5% human albumin solution over 30 minutes* - **Crystalloids** are the preferred first-line fluids for initial resuscitation in pediatric shock; **colloids** like albumin are not typically recommended as the primary initial choice. - Administering the fluid over **30 minutes** is **too slow** for a child presenting with **hypotensive shock**, who requires rapid hemodynamic stabilization. *20 ml/kg 0.45% sodium chloride with 5% dextrose over 20 minutes* - **0.45% sodium chloride** is a **hypotonic solution** and is contraindicated for fluid resuscitation due to the risk of inducing **cerebral edema** from fluid shifts. - **Dextrose-containing fluids** are used for maintenance therapy or to treat hypoglycemia, not for rapid **bolus resuscitation** in circulatory collapse. *15 ml/kg Hartmann's solution over 60 minutes* - Although Hartmann's solution is an appropriate **isotonic crystalloid**, the volume of **15 ml/kg** is suboptimal compared to the recommended 20 ml/kg for initial shock. - Administering the bolus over **60 minutes** is dangerously slow and would significantly delay critical resuscitation in a child with **hypotension** and poor perfusion.

Question 118: A 5-year-old boy is brought to the emergency department during an acute asthma attack. He has been given nebulised salbutamol and ipratropium bromide with oxygen, and oral prednisolone. After 30 minutes, he remains in severe respiratory distress. He is speaking single words only, respiratory rate 46 breaths/minute, heart rate 148 bpm, oxygen saturation 91% on 15 litres oxygen via non-rebreathe mask. A blood gas is performed showing: pH 7.31, pCO2 6.8 kPa, pO2 8.9 kPa, base excess -1, bicarbonate 24 mmol/L. What is the most critical implication of this blood gas result?

A. The hypoxaemia indicates need for immediate CPAP therapy
B. The metabolic acidosis suggests tissue hypoperfusion requiring fluid resuscitation
C. The rising pCO2 indicates tiring and impending respiratory failure (Correct Answer)
D. The normal pH indicates adequate compensation and stable condition
E. The base excess is normal so no additional intervention is required

Explanation: ***The rising pCO2 indicates tiring and impending respiratory failure*** - In acute asthma, initial **hyperventilation** often leads to a **low pCO2** due to increased work of breathing. A high pCO2 of **6.8 kPa** in this severely distressed child, who is failing initial treatment, strongly indicates **respiratory muscle fatigue** and inadequate ventilation, signifying impending respiratory failure. - This finding, coupled with a pH of **7.31** (respiratory acidosis), is a critical sign of **life-threatening asthma** requiring immediate senior intervention and potential advanced airway management. *The hypoxaemia indicates need for immediate CPAP therapy* - While the patient is hypoxemic (O2 saturation 91% on high-flow oxygen), **CPAP** is generally not the first-line treatment for acute asthma in children and can worsen air trapping and increase the risk of **pneumothorax**. - Management should prioritize aggressive pharmacological bronchodilation (e.g., IV magnesium sulfate, IV salbutamol) and, if necessary, **mechanical ventilation** as a definitive measure. *The metabolic acidosis suggests tissue hypoperfusion requiring fluid resuscitation* - The blood gas results show a **base excess of -1** and a **bicarbonate of 24 mmol/L**, both of which are within normal limits. This indicates there is no significant **metabolic acidosis**. - The primary acidosis is respiratory, and there is no evidence of tissue hypoperfusion warranting fluid resuscitation, which could potentially overload the patient. *The normal pH indicates adequate compensation and stable condition* - A pH of **7.31** is actually **acidic**, falling below the normal range of 7.35-7.45. This indicates an uncompensated or poorly compensated **respiratory acidosis**. - A rising pCO2 in severe asthma, regardless of the pH (which can be deceptively normal in some stages of respiratory failure), always signals an **exhausted child** and a rapidly deteriorating, unstable condition. *The base excess is normal so no additional intervention is required* - While a **normal base excess** correctly identifies the absence of a significant metabolic derangement, it does not rule out severe and life-threatening **ventilatory failure**. - The combination of severe clinical distress and a dangerously high pCO2 mandates **urgent and aggressive intervention**, despite the normal base excess.

Question 119: An 8-year-old boy presents to the emergency department with a 6-hour history of central abdominal pain that has now localised to the right iliac fossa. He has vomited twice and has no appetite. Temperature is 38.1°C, heart rate 110 bpm. Abdominal examination reveals guarding and rebound tenderness in the right iliac fossa. Rovsing's sign is positive. Urine dipstick is normal. Blood tests show WCC 15.2 × 10⁹/L (neutrophils 12.4), CRP 45 mg/L. The surgical team is reviewing him. What is the most appropriate initial imaging investigation if clinical assessment remains equivocal?

A. Ultrasound scan of abdomen and pelvis (Correct Answer)
B. CT scan of abdomen and pelvis with intravenous contrast
C. Abdominal X-ray to exclude intestinal obstruction
D. MRI scan of abdomen and pelvis
E. No imaging required - proceed to diagnostic laparoscopy

Explanation: ***Ultrasound scan of abdomen and pelvis***- **Ultrasound (US)** is the initial imaging modality of choice for suspected **acute appendicitis** in children due to its **non-invasive nature** and the absence of **ionizing radiation**.- It is effective in identifying an **inflamed appendix** (e.g., non-compressible, >6mm diameter) and can help rule out other pediatric causes of right iliac fossa pain like **mesenteric adenitis**.*CT scan of abdomen and pelvis with intravenous contrast*- While **CT scans** offer high sensitivity and specificity, they involve significant **radiation exposure**, which is a concern in pediatric patients due to increased lifetime cancer risk.- CT is typically reserved for cases where the **ultrasound is equivocal**, negative despite strong clinical suspicion, or when complications like **perforation** or **abscess** are suspected.*Abdominal X-ray to exclude intestinal obstruction*- **Plain abdominal X-rays** have very limited utility in diagnosing acute appendicitis, as specific findings are often absent or non-specific.- This investigation is more appropriate for suspicion of **bowel obstruction** (e.g., dilated bowel loops, air-fluid levels) or **pneumoperitoneum** (free air indicating perforation).*MRI scan of abdomen and pelvis*- **MRI** is a highly accurate, radiation-free imaging modality but is often limited by its **availability** in emergency settings and longer scan times.- It is generally considered a strong alternative when ultrasound is inconclusive and **CT is contraindicated** (e.g., in pregnant patients or very young children where radiation is a major concern).*No imaging required - proceed to diagnostic laparoscopy*- While appendicitis can be a clinical diagnosis, proceeding directly to surgery in **equivocal cases** significantly increases the **negative appendectomy rate**.- Initial imaging, particularly with ultrasound, is recommended when clinical certainty is not high to avoid unnecessary **surgical risks** and the complications of **general anesthesia**.

Question 120: A 3-year-old girl is brought to the GP with a 24-hour history of fever to 38.9°C and pulling at her right ear. She has had coryzal symptoms for 3 days. On examination, she is alert and playful. Temperature is 38.7°C, heart rate 120 bpm. The right tympanic membrane is bulging and erythematous with loss of light reflex. The left ear is normal. There is no discharge, mastoid tenderness, or cervical lymphadenopathy. She has no drug allergies. What is the most appropriate initial management according to current guidance?

A. Prescribe immediate oral amoxicillin for 5 days
B. Provide safety-netting advice and analgesia, with delayed antibiotic prescription (Correct Answer)
C. Prescribe oral co-amoxiclav due to severity of bulging tympanic membrane
D. Refer urgently to ENT for consideration of myringotomy
E. Prescribe topical antibiotic ear drops and oral analgesia

Explanation: ***Provide safety-netting advice and analgesia, with delayed antibiotic prescription*** - For children older than **2 years** with **unilateral acute otitis media (AOM)** and no otorrhoea, a **no antibiotic** or **delayed antibiotic** strategy is recommended by **NICE guidelines**. - Most cases of AOM are self-limiting and resolve spontaneously within 3 days; management focuses on **symptom control** with paracetamol or ibuprofen.*Prescribe immediate oral amoxicillin for 5 days* - Immediate antibiotics are reserved for children who are **systemically very unwell**, have **otorrhoea**, or are under 2 years old with **bilateral infection**. - Using immediate antibiotics in simple cases does not significantly reduce pain or prevent complications like **mastoiditis**.*Prescribe oral co-amoxiclav due to severity of bulging tympanic membrane* - **Amoxicillin** is the first-line antibiotic for AOM if required; **co-amoxiclav** is only indicated if there is no response to first-line agents or for complications. - **Bulging of the tympanic membrane** is an expected finding in AOM and doesn't automatically necessitate broad-spectrum antibiotic therapy.*Refer urgently to ENT for consideration of myringotomy* - Urgent referral is only indicated for patients with **intra-cranial complications**, facial nerve palsy, or clinical evidence of **acute mastoiditis**. - **Myringotomy** is a surgical intervention not used for initial management of uncomplicated simple AOM in a primary care setting.*Prescribe topical antibiotic ear drops and oral analgesia* - Topical antibiotics are used for **otitis externa** or occasionally for chronic suppurative otitis media with a **perforated eardrum**, but not for intact AOM. - In AOM with an **intact tympanic membrane**, topical medications cannot reach the site of infection in the middle ear.

Question 121: A 2-year-old child presents with a 12-hour history of fever (39.6°C), refusing to walk, and holding the right leg flexed. The parents report she was well until yesterday. On examination, she is febrile and appears uncomfortable. She cries when the right hip is moved. Range of motion is limited in all directions, particularly internal rotation and extension. Left hip examination is normal. There is no overlying erythema or swelling. She is fully immunised. Blood tests show WCC 16.8 × 10⁹/L, CRP 78 mg/L. What is the most important differential diagnosis that must be excluded?

A. Transient synovitis of the hip
B. Septic arthritis of the hip (Correct Answer)
C. Perthes disease
D. Developmental dysplasia of the hip
E. Juvenile idiopathic arthritis

Explanation: ***Septic arthritis of the hip*** - This is a **pediatric emergency** presenting with acute onset of **fever**, **refusal to weight-bear**, and severe pain with **limited range of hip motion**, especially internal rotation and extension. - The child meets several **Kocher criteria** (fever >38.5°C, non-weight bearing, and elevated **WCC/CRP**), which strongly indicates septic arthritis requiring urgent **joint aspiration** to prevent permanent joint damage. *Transient synovitis of the hip* - This is a common, self-limiting condition often following a **viral upper respiratory tract infection**, usually presenting with milder symptoms and less significant systemic inflammation. - While it causes hip pain and limp, the high fever (39.6°C), elevated WCC (16.8), and markedly raised CRP (78 mg/L) in this case are much more suggestive of **septic arthritis**, making transient synovitis a less likely primary diagnosis to be assumed without exclusion of infection. *Perthes disease* - This condition involves **avascular necrosis** of the femoral head and typically presents with a **chronic, insidious limp** and hip pain, rather than an acute febrile illness. - It usually affects children between **4 and 8 years** of age, and would not cause the acute high fever and significantly elevated **WCC and CRP** seen in this 2-year-old. *Developmental dysplasia of the hip* - This is a **congenital condition** that is typically screened for at birth or in infancy via physical examination (**Barlow and Ortolani maneuvers**) or ultrasound. - It presents with features like **leg length discrepancy** or limited abduction, not an acute febrile illness with severe pain and high inflammatory markers in a 2-year-old. *Juvenile idiopathic arthritis* - This is a **chronic autoimmune condition** characterized by joint inflammation lasting for at least **6 weeks**. - The **hyperacute presentation** (12-hour history) with high fever and marked elevation of inflammatory markers is not typical for the initial presentation of JIA, which usually has a more insidious onset.

Question 122: A 10-month-old infant with bronchiolitis has been admitted for 36 hours. Initial oxygen requirement was 35% via head box to maintain saturations >92%. The infant is now on 28% oxygen with saturations of 93-95%. Respiratory rate has decreased from 68 to 52 breaths/minute. The infant is taking 60% of normal milk feeds orally. Parents are keen to go home. What is the most appropriate management plan?

A. Discharge home with safety-netting advice as oxygen requirement is decreasing
B. Continue admission until oxygen saturations are consistently >92% in air for 4 hours (Correct Answer)
C. Discharge home with home oxygen therapy and community respiratory nurse follow-up
D. Continue admission for at least another 24 hours regardless of clinical progress
E. Discharge home once oral intake reaches 75% of normal feeds

Explanation: ***Continue admission until oxygen saturations are consistently >92% in air for 4 hours*** - According to **NICE guidelines**, infants with **bronchiolitis** should only be discharged once they maintain stable oxygen saturations **>92% in room air** for a consistent period, typically 4 hours. - Although the infant is improving, they still require **28% supplemental oxygen**, making them medically unfit for discharge until they can maintain saturations without support. *Discharge home with safety-netting advice as oxygen requirement is decreasing* - While the downward trend in oxygen needs is positive, the infant remains **oxygen-dependent**, which is a primary contraindication for discharge in acute bronchiolitis. - Discharging a patient who still requires **oxygen therapy** increases the risk of rapid respiratory decompensation at home and subsequent **re-admission**. *Discharge home with home oxygen therapy and community respiratory nurse follow-up* - **Home oxygen therapy** is not standard practice for acute bronchiolitis and is generally reserved for children with **chronic lung disease** or extreme prematurity. - Routine management requires ensuring the infant has reached the **clinical plateau** and can maintain their own oxygenation safely before leaving the hospital. *Continue admission for at least another 24 hours regardless of clinical progress* - Discharge decisions should be governed by **physiological stability** and meeting specific safety milestones rather than an arbitrary **time-based threshold**. - If the infant meets all **discharge criteria** (oxygenation in air and adequate feeding) sooner than 24 hours, keeping them hospitalized unnecessarily increases the risk of **nosocomial infection**. *Discharge home once oral intake reaches 75% of normal feeds* - While maintaining **adequate hydration** (usually >50-75% of normal feeds) is a mandatory discharge criterion, it is not the only one. - In this case, the **respiratory requirement** is the limiting factor; both nutritional stability and **room-air oxygenation** must be achieved simultaneously for a safe discharge.

Question 123: A 4-year-old boy with recurrent wheeze is being reviewed in clinic. His mother reports he has had four episodes of wheeze in the past year, each triggered by viral upper respiratory tract infections. Between episodes, he is completely well with no symptoms. He has no history of atopy, no night-time cough, and no exercise-induced symptoms. Examination during the clinic visit is entirely normal. Which management strategy is most appropriate for this child?

A. Commence regular low-dose inhaled corticosteroid therapy
B. Prescribe salbutamol inhaler with spacer to use as required during viral illnesses (Correct Answer)
C. Prescribe a combined inhaled corticosteroid and long-acting beta-agonist inhaler
D. Commence oral montelukast as regular daily preventive therapy
E. Arrange for allergy testing before deciding on treatment

Explanation: ***Prescribe salbutamol inhaler with spacer to use as required during viral illnesses***- The child's presentation of **recurrent wheeze** strictly associated with **viral upper respiratory tract infections**, with complete wellness between episodes and no signs of atopy or chronic symptoms, defines **episodic viral-induced wheeze**.- For this condition, **short-acting beta-agonists (SABA) like salbutamol** used **as required** during viral illnesses, delivered with a **spacer**, are the recommended first-line management for symptom relief.*Commence regular low-dose inhaled corticosteroid therapy*- **Regular low-dose inhaled corticosteroids (ICS)** are indicated for **multi-trigger wheeze** or persistent asthma, where symptoms occur frequently, at night, or with activity, even without viral triggers.- This child's clear **symptom-free intervals** and lack of atopy or nocturnal/exercise-induced symptoms suggest that daily preventive ICS therapy is not necessary or most appropriate at this stage.*Prescribe a combined inhaled corticosteroid and long-acting beta-agonist inhaler*- **Combined inhaled corticosteroid and long-acting beta-agonist (ICS/LABA) inhalers** are reserved for children with **moderate to severe persistent asthma** that is not adequately controlled with ICS alone.- This child's presentation of **intermittent, viral-triggered wheeze** does not warrant such aggressive or maintenance therapy.*Commence oral montelukast as regular daily preventive therapy*- While **oral montelukast** can be considered for **viral-induced wheeze**, it is generally a second-line option for children with more frequent or severe episodes, or as an alternative if bronchodilators are insufficient.- For a child who is **completely well between episodes** and responds to bronchodilators, regular daily preventive therapy may be an overtreatment as a primary strategy.*Arrange for allergy testing before deciding on treatment*- The clinical history explicitly states **no history of atopy** and that episodes are **triggered by viral infections**, not environmental allergens.- **Allergy testing** is less relevant when the trigger is clearly identified as viral, and it would not change the initial symptomatic management for episodic viral-induced wheeze.

Question 124: A 14-month-old child is brought to the emergency department with a 3-day history of fever up to 39.8°C, cough, and rapid breathing. The child appears lethargic. On examination, temperature is 39.2°C, respiratory rate 52 breaths/minute, heart rate 165 bpm, oxygen saturation 94% on air, capillary refill time 3 seconds. Chest examination reveals bronchial breathing and crackles in the right lower zone. Chest X-ray shows right lower lobe consolidation. Blood tests show WCC 18.2 × 10⁹/L (neutrophils 14.1), CRP 142 mg/L. What is the most appropriate antibiotic choice?

A. Oral amoxicillin 40mg/kg/day divided three times daily (Correct Answer)
B. Intravenous benzylpenicillin and oral clarithromycin
C. Intravenous co-amoxiclav alone
D. Oral co-amoxiclav 40mg/kg/day divided three times daily
E. Intravenous cefotaxime and clarithromycin

Explanation: ***Oral amoxicillin 40mg/kg/day divided three times daily***- **Amoxicillin** is the first-line antibiotic for pediatric **community-acquired pneumonia (CAP)** because it provides excellent coverage against **Streptococcus pneumoniae**, the most common bacterial cause in this age group.- Despite the fever, lethargy, and elevated CRP, the child's oxygen saturation (94% on air) indicates that **oral therapy** is appropriate for this severity, as per **NICE guidelines** for non-severe CAP if the child can tolerate oral intake.*Intravenous benzylpenicillin and oral clarithromycin*- **Intravenous antibiotics** are generally reserved for children with signs of **severe sepsis**, inability to tolerate oral intake, or complicated pneumonia, which is not clearly indicated here.- **Clarithromycin** (a macrolide) is typically added for suspected **atypical pneumonia** (e.g., Mycoplasma), which is less common in toddlers compared to school-aged children, making initial empiric coverage less critical.*Intravenous co-amoxiclav alone*- **Co-amoxiclav** is a broad-spectrum antibiotic and is not recommended as a first-line agent for uncomplicated CAP because the clavulanic acid component does not add benefit against **Streptococcus pneumoniae**.- Using **broad-spectrum intravenous** agents unnecessarily increases the risk of antibiotic resistance, *Clostridioides difficile* infection, and complications associated with IV access.*Oral co-amoxiclav 40mg/kg/day divided three times daily*- Similar to the IV version, **oral co-amoxiclav** is unnecessary for standard pneumonia because **amoxicillin** effectively covers the primary pathogen, **Streptococcus pneumoniae**.- It is typically reserved for second-line treatment, specific cases where **Staphylococcus aureus** or beta-lactamase producing *H. influenzae* is suspected, or in cases of treatment failure.*Intravenous cefotaxime and clarithromycin*- **Cefotaxime** is a third-generation cephalosporin and is reserved for very severe cases of pneumonia, suspected **meningitis**, or when there is concern for highly resistant organisms, none of which are evident.- This combination represents a **broad-spectrum intravenous** approach that is overly aggressive for an initial presentation of localized **lobar consolidation** in a child not requiring intensive care.

Question 125: A 6-year-old girl with asthma on regular beclometasone 200 micrograms twice daily presents with acute wheeze. She has been given 10 puffs of salbutamol via spacer but remains breathless. On examination, she can speak 3-4 words per breath, respiratory rate 38 breaths/minute, heart rate 128 bpm, oxygen saturation 92% on air. She has bilateral wheeze with reduced air entry in both lung bases. What defines this exacerbation as severe rather than life-threatening?

A. Oxygen saturation is ≥92% and she can speak in short phrases (Correct Answer)
B. She has no silent chest and maintains consciousness
C. Her heart rate is <130 bpm and blood pressure is normal
D. Peak flow is likely >33% predicted and pCO2 would be normal
E. She is responding partially to initial bronchodilator therapy

Explanation: ***Oxygen saturation is ≥92% and she can speak in short phrases*** - In children over 5, **severe asthma** is characterized by an oxygen saturation of **92-94%** and the ability to speak in **short phrases/words**, consistent with the patient's 92% SpO2 and speaking 3-4 words per breath. - Conversely, **life-threatening asthma** typically presents with an SpO2 **<92%** or being too breathless to talk (speaking only single words or unable to speak at all). *She has no silent chest and maintains consciousness* - While the absence of a **silent chest**, cyanosis, or **impaired consciousness** indicates the attack is not yet life-threatening, these are signs *not present* rather than the primary positive criteria for classifying an exacerbation as severe. - These features are ominous signs of **impending respiratory failure**, whose absence is reassuring but does not primarily define the 'severe' category over 'life-threatening' based on quantitative measures. *Her heart rate is <130 bpm and blood pressure is normal* - For a 6-year-old, a **heart rate >125 bpm** is a criterion for **severe asthma**. The patient's heart rate of 128 bpm falls into the severe category, meaning the statement "<130 bpm" doesn't adequately differentiate from life-threatening where tachycardia is also common. - **Normal blood pressure** is an expected finding in severe asthma, as **hypotension** is a late and critical sign of a life-threatening or near-fatal attack. *Peak flow is likely >33% predicted and pCO2 would be normal* - A **Peak Expiratory Flow (PEF)** between **33-50%** of best/predicted is consistent with **severe asthma**, though PEF was not measured in this scenario. - A **normal pCO2** (4.6–6.0 kPa) is often found in severe asthma, but a **rising or elevated pCO2** is a critical indicator of **life-threatening asthma** due to respiratory muscle fatigue and impending respiratory failure. *She is responding partially to initial bronchodilator therapy* - The patient

Question 126: A 19-month-old child presents to the emergency department with a 5-day history of fever ranging from 38.5-40.2°C. The parents report the child has been irritable with decreased appetite but no specific symptoms. Examination reveals bilateral non-purulent conjunctivitis, cracked red lips, cervical lymphadenopathy with one node measuring 2.5cm, and a polymorphous rash on the trunk. Hands and feet appear slightly oedematous. Heart sounds are normal with no murmur. What is the most important immediate investigation?

A. Echocardiography to assess for coronary artery abnormalities
B. Blood culture, full blood count, and inflammatory markers (Correct Answer)
C. Throat swab for bacterial culture and rapid antigen test
D. Chest X-ray to exclude pneumonia
E. Lumbar puncture to exclude meningitis

Explanation: ***Blood culture, full blood count, and inflammatory markers*** - Prior to diagnosing **Kawasaki disease**, it is critical to exclude **sepsis** and other bacterial infections, for which **blood cultures** and a **full blood count** are essential. - Elevated **inflammatory markers** (CRP and ESR) are part of the supporting diagnostic criteria for Kawasaki disease and help establish a baseline for monitoring treatment response with IVIG. *Echocardiography to assess for coronary artery abnormalities* - While **echocardiography** is vital for monitoring **coronary artery aneurysms** in Kawasaki disease, it is secondary to stabilizing the patient and excluding immediate life-threatening infections like sepsis. - A baseline echocardiogram is standard practice once the clinical diagnosis is suspected, but it does not take precedence over **emergency sepsis screening** in a febrile child. *Throat swab for bacterial culture and rapid antigen test* - A throat swab is primarily used to identify **Group A Streptococcus** (e.g., in Scarlet fever), which can mimic some Kawasaki symptoms but does not explain the full systemic picture presented. - This investigation is too narrow and does not address the urgent need to assess for broader **systemic inflammatory** or infectious processes. *Chest X-ray to exclude pneumonia* - A **chest X-ray** is not indicated as the most immediate investigation, as there are no specific respiratory signs such as tachypnoea, cough, or focal crackles. - The child's symptoms of **cervical lymphadenopathy** and **conjunctivitis** point more towards a systemic inflammatory syndrome rather than a primary pulmonary infection. *Lumbar puncture to exclude meningitis* - **Lumbar puncture** is unnecessary in this case as the child lacks specific clinical signs of **meningism**, such as neck stiffness, photophobia, or altered level of consciousness. - Although Kawasaki disease can cause **aseptic meningitis**, it is a diagnosis of exclusion and not the most immediate priority compared to excluding other more common and severe infections.

Question 127: A 7-year-old boy with known asthma presents with an acute severe exacerbation. He has received three doses of nebulised salbutamol with oxygen and oral prednisolone. Two hours after presentation, he remains distressed with oxygen saturation 93% on 15 litres oxygen via non-rebreathe mask. Respiratory rate is 42 breaths/minute, heart rate 145 bpm. He can only speak in short phrases. Chest examination reveals bilateral wheeze with good air entry. Blood gas shows pH 7.38, pCO2 4.8 kPa, pO2 9.2 kPa, bicarbonate 24 mmol/L. What is the most appropriate next management step?

A. Commence intravenous magnesium sulphate infusion (Correct Answer)
B. Intubate and ventilate immediately due to impending respiratory failure
C. Administer intravenous aminophylline infusion
D. Continue current management and reassess in 1 hour
E. Commence non-invasive ventilation with CPAP

Explanation: ***Commence intravenous magnesium sulphate infusion*** - This patient has **acute severe asthma** failing to respond to initial bronchodilators and systemic steroids, as evidenced by persistent **hypoxia (93%)** and distress despite oxygen therapy. - Following **BTS/SIGN guidelines**, intravenous **magnesium sulphate** is the first-line intravenous therapy for children requiring escalation because of its bronchodilatory properties and relatively safe side-effect profile. *Intubate and ventilate immediately due to impending respiratory failure* - The **pCO2 of 4.8 kPa** and **pH of 7.38** indicate that the patient is currently compensating and is not in imminent respiratory failure (which would present with a rising pCO2 or acidosis). - Intubation in asthma is a high-risk procedure reserved for **exhaustion**, silent chest, or life-threatening hypercapnia after pharmacological measures have failed. *Administer intravenous aminophylline infusion* - While used in severe asthma, **aminophylline** is generally considered after magnesium sulphate or in an ICU setting due to its **narrow therapeutic index** and risk of toxicity. - It requires **cardiac monitoring** and serum level checks, making it a secondary choice to the more rapidly acting and safer magnesium sulphate. *Continue current management and reassess in 1 hour* - Waiting another hour is inappropriate as the patient remains in **significant respiratory distress** and is hypoxic despite maximal non-invasive oxygen delivery. - Failure to escalate treatment in a child speaking only in **short phrases** with persistent tachycardia and tachypnea risks rapid clinical deterioration and **exhaustion**. *Commence non-invasive ventilation with CPAP* - **CPAP** and other forms of non-invasive ventilation (NIV) are not standard components of the initial management algorithm for **pediatric acute asthma** exacerbations. - The primary pathology in asthma is airway obstruction/bronchospasm, which is better addressed with **intravenous bronchodilators** rather than positive pressure alone.

Question 128: What is the recommended first-line maintenance inhaled corticosteroid dose adjustment for a child with asthma who continues to have symptoms despite adherence to low-dose inhaled corticosteroid therapy?

A. Double the inhaled corticosteroid dose to moderate dose
B. Add a long-acting beta-agonist while maintaining low-dose inhaled corticosteroid (Correct Answer)
C. Switch to a combination inhaler containing formoterol and budesonide
D. Add oral montelukast while maintaining current inhaled corticosteroid dose
E. Increase to high-dose inhaled corticosteroid therapy

Explanation: ***Add a long-acting beta-agonist while maintaining low-dose inhaled corticosteroid*** - For children whose asthma is not controlled on low-dose **inhaled corticosteroids (ICS)**, the recommended first-line step-up in therapy is to add a **long-acting beta-agonist (LABA)**. - This combination of low-dose ICS and LABA is more effective in improving **lung function** and reducing symptoms than simply increasing the ICS dose, while minimizing steroid exposure. *Double the inhaled corticosteroid dose to moderate dose* - While increasing ICS dose is an option, adding a **LABA** to low-dose ICS is generally considered more effective for achieving better asthma control in children. - Higher doses of ICS, even moderate, carry an increased risk of **systemic side effects**, such as potential impact on **growth velocity** in children. *Switch to a combination inhaler containing formoterol and budesonide* - This option introduces a **LABA**, which is correct, but switching directly to a specific **combination inhaler** might imply a specific regimen like **MART (Maintenance and Reliever Therapy)**, which is not universally the first-line *adjustment* over simply adding a LABA to existing ICS. - The general principle is to add the **LABA component** to the existing low-dose ICS, which can be done with separate inhalers if a suitable combination is not readily available or preferred. *Add oral montelukast while maintaining current inhaled corticosteroid dose* - **Oral montelukast (a leukotriene receptor antagonist)** is an alternative add-on therapy but is generally considered **second-line** to a **LABA** in terms of effectiveness for persistent asthma symptoms. - **LABAs** have demonstrated superior efficacy in improving **forced expiratory volume (FEV1)** and reducing exacerbations compared to **leukotriene modifiers**. *Increase to high-dose inhaled corticosteroid therapy* - **High-dose inhaled corticosteroids** are reserved for children with more severe asthma that remains uncontrolled despite **low-dose ICS/LABA combination therapy**. - Initiating high-dose ICS prematurely increases the risk of significant **systemic side effects**, including **adrenal suppression**, and deviates from the stepwise management approach.

Question 129: An 11-month-old infant presents with a 2-day history of coryzal symptoms followed by increased work of breathing. The infant was born at term with no significant medical history. On examination, temperature is 37.8°C, respiratory rate 65 breaths/minute, heart rate 155 bpm, oxygen saturation 91% on air. There is subcostal recession, nasal flaring, and fine bilateral inspiratory crackles with scattered wheeze. The infant is taking approximately 50% of normal feeds. What is the most likely diagnosis?

A. First episode of viral-induced wheeze
B. Acute bronchiolitis (Correct Answer)
C. Bacterial pneumonia
D. Aspiration pneumonitis
E. Cardiac failure secondary to congenital heart disease

Explanation: ***Acute bronchiolitis*** - This infant presents with a classic clinical triad for bronchiolitis: **age <2 years**, a **coryzal prodrome**, and respiratory distress characterized by **fine crackles** and **wheeze**. - The moderate severity is indicated by **reduced oral intake (50%)** and oxygen saturations of **91%**, which often require supportive management like fluids and oxygen. *First episode of viral-induced wheeze* - Viral-induced wheeze is clinically distinguished by the absence of **fine inspiratory crackles**, which are a hallmark of bronchiolitis. - This diagnosis is rarely made in infants under **12 months** of age, as the pathophysiology involves airway hyper-responsiveness rather than bronchiolar inflammation. *Bacterial pneumonia* - Pneumonia typically presents with a **high-grade fever** (>39°C) and **focal chest signs** (localized crackles or dullness) rather than generalized bilateral crackles and wheeze. - The preceding 2-day coryzal prodrome and the combination of wheeze and crackles fits the viral etiology of **RSV** over a bacterial cause. *Aspiration pneumonitis* - This condition requires a high clinical suspicion based on a history of **choking episodes**, swallowing dysfunction, or **neuromuscular disorders**, none of which are present here. - Aspiration typically results in localized lung changes, whereas this infant has **bilateral, diffuse** clinical findings. *Cardiac failure secondary to congenital heart disease* - While it can cause tachypnea and poor feeding, it is usually associated with **hepatomegaly**, **heart murmurs**, or a history of poor weight gain from birth. - The acute onset following **coryzal symptoms** strongly points toward an infectious respiratory process rather than a primary cardiac decompensation.

Question 130: A 5-year-old girl with asthma presents to the emergency department with wheeze and breathlessness that started 4 hours ago. She uses a salbutamol inhaler as required. On examination, she is speaking in sentences, respiratory rate is 32 breaths/minute, heart rate 115 bpm, oxygen saturation 94% on air. She has widespread polyphonic wheeze throughout both lung fields. Peak expiratory flow rate is 65% of her predicted value. What is the most appropriate initial management?

A. Administer 10 puffs of salbutamol via spacer, assess response after 15 minutes (Correct Answer)
B. Administer nebulised salbutamol 2.5mg with oxygen and oral prednisolone 20mg
C. Give oral prednisolone 20mg and reassess in 4 hours
D. Administer intravenous salbutamol and oral prednisolone 30mg
E. Give nebulised ipratropium bromide 250 micrograms as monotherapy

Explanation: ***Administer 10 puffs of salbutamol via spacer, assess response after 15 minutes***- This patient presents with a **moderate asthma exacerbation**, defined by PEFR >50%, ability to **speak in sentences**, and oxygen saturation ",=" 92%.- For moderate cases, **inhaled beta-2 agonists** (salbutamol) delivered via a **pressurized metered-dose inhaler (pMDI) and spacer** are as effective as nebulizers and are the gold standard for initial management.*Administer nebulised salbutamol 2.5mg with oxygen and oral prednisolone 20mg*- **Nebulized therapy** is specifically indicated for **severe** (e.g., PEFR <50%, saturations <92%, or inability to complete sentences) or life-threatening asthma.- While the prednisolone dose is correct for her age, the delivery method of salbutamol via **oxygen-driven nebulization** is unnecessary for a moderate exacerbation.*Give oral prednisolone 20mg and reassess in 4 hours*- Waiting four hours for reassessment without providing an immediate **bronchodilator** is unsafe and does not address the patient's current **polyphonic wheeze**.- While **oral corticosteroids** are essential to reduce airway inflammation, they take several hours to act and must be paired with immediate-acting **bronchodilation**.*Administer intravenous salbutamol and oral prednisolone 30mg*- **Intravenous salbutamol** is a high-level intervention reserved for **life-threatening asthma** that has failed to respond to continuous nebulized treatment.- The dose of **prednisolone 30mg** is typically reserved for children older than 5 years; for a 5-year-old child, **20mg** is the standard dose.*Give nebulised ipratropium bromide 250 micrograms as monotherapy*- **Ipratropium bromide** should never be used as **monotherapy** in acute asthma flares as it is less effective than beta-2 agonists.- It is typically added to salbutamol only in **severe or life-threatening** exacerbations to provide additional bronchodilation via a different pathway.

Question 131: A 3-year-old boy presents with fever of 39.4°C for 48 hours. His mother reports he has been drinking less than usual but is still passing urine. On examination, he is alert and interactive. Heart rate is 130 bpm, respiratory rate 28 breaths/minute, capillary refill time 2 seconds centrally. He has bilateral cervical lymphadenopathy and an erythematous throat with white exudate on the tonsils. A rapid antigen detection test for Group A Streptococcus is positive. What is the most appropriate management?

A. Administer intravenous fluids and await blood culture results before starting antibiotics
B. Prescribe oral phenoxymethylpenicillin for 10 days and provide safety-netting advice (Correct Answer)
C. Admit for intravenous benzylpenicillin due to decreased oral intake
D. Prescribe oral amoxicillin and arrange follow-up in 48 hours
E. Advise symptomatic treatment only as most cases resolve spontaneously

Explanation: ***Prescribe oral phenoxymethylpenicillin for 10 days and provide safety-netting advice***- The child's presentation (fever, cervical lymphadenopathy, exudative tonsillitis) with a **positive rapid antigen detection test for Group A Streptococcus (GAS)** confirms **streptococcal pharyngitis**. **Oral phenoxymethylpenicillin (Penicillin V)** is the first-line antibiotic.- A **10-day course** is crucial for **GAS eradication** to prevent **acute rheumatic fever** and other **non-suppurative complications**. Safety-netting ensures parents know when to seek further medical attention.*Administer intravenous fluids and await blood culture results before starting antibiotics*- The child is **alert and interactive**, has a **capillary refill time of 2 seconds**, and is **passing urine**, indicating he is **well-perfused** and not requiring **intravenous fluids** for dehydration or shock.- For an uncomplicated, localized **streptococcal pharyngitis** in a stable child, **blood cultures** are not routinely indicated, and delaying antibiotics for results is inappropriate given the risk of **rheumatic fever**.*Admit for intravenous benzylpenicillin due to decreased oral intake*- Despite drinking less, the child shows no signs of **severe dehydration** or **systemic toxicity** requiring hospital admission or **intravenous antibiotics**. He is alert and interactive.- **Intravenous benzylpenicillin** is reserved for severe infections, inability to tolerate oral medications, or signs of **sepsis**, which are not present in this stable patient.*Prescribe oral amoxicillin and arrange follow-up in 48 hours*- While **amoxicillin** is effective against GAS, it is typically avoided for suspected streptococcal pharyngitis before confirmation, as it can cause a **maculopapular rash** if the underlying infection is **infectious mononucleosis (EBV)**.- A **10-day course** of antibiotics is standard for GAS; a 48-hour follow-up without specifying the full course is insufficient for eradication and prevention of complications.*Advise symptomatic treatment only as most cases resolve spontaneously*- Although many viral pharyngitis cases resolve spontaneously, a **confirmed positive rapid antigen test for Group A Streptococcus** necessitates antibiotic treatment.- **Antibiotic therapy** for GAS is essential not only to reduce the duration and severity of symptoms but, more importantly, to prevent serious **non-suppurative complications** like **acute rheumatic fever** and **post-streptococcal glomerulonephritis**.

Question 132: A 14-month-old child presents with a 24-hour history of fever to 39.1°C and irritability. The parents report the child has had decreased wet nappies. On examination, the child is alert but irritable, temperature 38.7°C, heart rate 155 bpm, respiratory rate 38/min, capillary refill time 2 seconds. Fontanelle is normal. Chest is clear, no rash, throat appears normal, and ears are normal. A urine sample obtained by clean catch shows: leucocytes +, nitrites negative, protein trace. What is the most appropriate next management step?

A. Discharge with safety-netting advice as nitrites are negative
B. Send urine for microscopy and culture; start oral antibiotics empirically (Correct Answer)
C. Admit for intravenous antibiotics pending urine culture
D. Repeat urine sample via catheter or suprapubic aspirate
E. Perform full septic screen including blood cultures and lumbar puncture

Explanation: ***Send urine for microscopy and culture; start oral antibiotics empirically***- In a 14-month-old child with fever, irritability, decreased wet nappies, and **positive leucocytes** on urine dipstick, a **Urinary Tract Infection (UTI)** is highly suspected, necessitating a definitive **urine culture**.- Given the child is alert, has a normal capillary refill time, and is over 3 months old, **oral antibiotics** are appropriate for empirical treatment while awaiting culture results, following general paediatric guidelines for uncomplicated UTIs.*Discharge with safety-netting advice as nitrites are negative*- **Negative nitrites** do not reliably rule out a UTI in young children, especially if they void frequently or if the infection is caused by organisms that do not reduce nitrates.- The presence of **leucocytes** and clinical symptoms such as fever, irritability, and decreased wet nappies indicates a likely infection that requires investigation and treatment, not just discharge.*Admit for intravenous antibiotics pending urine culture*- **Intravenous antibiotics** are generally reserved for infants younger than 3 months with fever, children who are systemically unwell (e.g., signs of sepsis), or those with suspected **pyelonephritis** and inability to tolerate oral intake.- This child is 14 months old and clinically stable (alert, CRT 2s), making empirical **oral antibiotics** a suitable first-line approach in the outpatient setting.*Repeat urine sample via catheter or suprapubic aspirate*- While catheterization or suprapubic aspirate yields the most accurate samples, a properly collected **clean catch** urine sample showing evidence of infection is sufficient to guide initial management in a non-critically ill child.- More invasive collection methods are typically reserved for situations where clean catch is impossible, a non-invasive sample is contaminated, or a rapid, definitive diagnosis is crucial in a severely unwell child.*Perform full septic screen including blood cultures and lumbar puncture*- A **full septic screen** (including blood cultures and lumbar puncture) is indicated for infants <3 months with fever or older children showing signs of severe sepsis, meningitis (e.g., bulging fontanelle, neck stiffness), or altered consciousness.- This child has a potential source of infection (UTI) and does not exhibit red flags for severe bacterial infection or meningitis, therefore, a full septic screen is not immediately warranted.

Question 133: A 4-year-old boy presents with fever of 38.2°C, cough, and increased work of breathing. On examination, he has respiratory rate 45/min, heart rate 125 bpm, oxygen saturations 94% on air, and widespread expiratory wheeze. The mother reports he has never wheezed before. He has a background of eczema and the family history includes maternal asthma. The GP started him on salbutamol inhaler yesterday with minimal improvement. What best explains the most appropriate underlying pathophysiological classification of his wheeze?

A. Multi-trigger wheeze due to multiple sensitisations and airway hyperresponsiveness (Correct Answer)
B. Episodic viral wheeze due to viral infection causing airway inflammation
C. Bronchiolitis due to respiratory syncytial virus infection
D. Foreign body aspiration causing unilateral wheeze and respiratory distress
E. Allergic asthma triggered by environmental allergen exposure

Explanation: ***Multi-trigger wheeze due to multiple sensitisations and airway hyperresponsiveness*** - The child's history of **eczema** and **maternal asthma** strongly indicates an underlying atopic predisposition and **airway hyperresponsiveness**, a key feature of this classification. - This phenotype explains wheezing triggered by various stimuli (including viral infections, as suggested by fever and cough) and often represents a precursor to **asthma** in young children. *Episodic viral wheeze due to viral infection causing airway inflammation* - This classification is typically applied to children who **only wheeze during viral infections** and lack significant atopic features or a family history of asthma. - The presence of **eczema** and **maternal asthma** in this patient suggests a more complex underlying predisposition than simple episodic viral wheeze. *Bronchiolitis due to respiratory syncytial virus infection* - **Bronchiolitis** primarily affects **infants under 12 months** of age, making it an unlikely diagnosis for a 4-year-old. - While it causes wheeze, the typical age and overall clinical presentation in this case are more consistent with a **reactive airway disease** in an older child. *Foreign body aspiration causing unilateral wheeze and respiratory distress* - Foreign body aspiration usually presents with a **sudden onset** of symptoms and often causes a **unilateral wheeze** or focal signs, which are not present here. - The patient's **fever** and **widespread expiratory wheeze** are inconsistent with mechanical obstruction and suggest a diffuse inflammatory process. *Allergic asthma triggered by environmental allergen exposure* - While the child has **atopic features**, the current episode is associated with **fever and cough**, indicating a **viral trigger** rather than purely environmental allergen exposure. - **Multi-trigger wheeze** is a more comprehensive classification for a preschool child with atopic sensitization whose wheezing episodes are provoked by both infections and potentially allergens.

Question 134: A 9-year-old girl with known asthma presents with acute breathlessness and wheeze. She is unable to complete sentences, has a respiratory rate of 38/min, heart rate 135 bpm, and oxygen saturations of 90% on air. She is started on high-flow oxygen, back-to-back salbutamol and ipratropium nebulisers, and oral prednisolone. Peak flow cannot be measured reliably due to poor effort. She has had two previous admissions to PICU for asthma. What additional factor most significantly increases her risk of a fatal asthma attack?

A. Age over 8 years with poorly controlled asthma
B. Previous history of PICU admissions for asthma (Correct Answer)
C. Current inability to measure peak flow reliably
D. Presence of tachycardia above 125 bpm
E. Requirement for high-flow oxygen therapy

Explanation: ***Previous history of PICU admissions for asthma***- A history of **near-fatal asthma** or previous **PICU admission** is the most significant predictor of future risk for a fatal asthma attack.- This background indicates a phenotype of disease that is prone to **respiratory failure** and suggests a lower threshold for clinical deterioration.*Age over 8 years with poorly controlled asthma*- While poor control is a risk factor, specific **age thresholds** like being over 8 years are not as significant as the severity of previous exacerbations.- Clinical guidelines prioritize **asthma severity markers** and past life-threatening events over age when assessing fatality risk.*Current inability to measure peak flow reliably*- Inability to perform **peak expiratory flow (PEF)** is a marker of the severity of the **current acute episode**, categorizing it as life-threatening.- It does not carry the same long-term **prognostic weight** for mortality as a documented history of intensive care requirements.*Presence of tachycardia above 125 bpm*- Tachycardia (in this age group, >125 bpm) is a clinical sign used to classify an **acute severe asthma** attack.- While important for immediate management decisions, it is a **transient physiological response** rather than a longitudinal risk factor for death.*Requirement for high-flow oxygen therapy*- The need for oxygen reflects **hypoxia (SpO2 <92%)**, which is a criterion for **life-threatening asthma** in the acute setting.- It indicates the severity of the **presenting episode** but is not as strong an indicator of underlying fatal risk as prior **mechanical ventilation** or PICU care.

Question 135: A 15-month-old child is admitted with fever of 38.9°C and lethargy. Initial observations show: heart rate 165 bpm, respiratory rate 42/min, capillary refill time 3 seconds centrally, blood pressure 85/50 mmHg. The child appears drowsy and has a non-blanching purpuric rash on the lower limbs with three lesions measuring 3-4 mm. Blood glucose is 3.8 mmol/L. Intravenous access is obtained. What is the single most important immediate intervention?

A. Administer intravenous ceftriaxone 80 mg/kg immediately
B. Give 20 ml/kg bolus of 0.9% sodium chloride over 10 minutes (Correct Answer)
C. Perform lumbar puncture to confirm meningitis
D. Obtain blood cultures before starting antibiotics
E. Administer intramuscular benzylpenicillin stat

Explanation: ***Give 20 ml/kg bolus of 0.9% sodium chloride over 10 minutes*** - This child exhibits clear signs of **septic shock** (fever, lethargy, tachycardia, tachypnea, prolonged capillary refill, hypotension, drowsiness, and a non-blanching purpuric rash), which necessitates immediate **fluid resuscitation**. - A rapid intravenous **crystalloid bolus** is the single most important immediate intervention to restore circulating volume, improve **tissue perfusion**, and stabilize hemodynamics. *Administer intravenous ceftriaxone 80 mg/kg immediately* - While **antibiotics** are critically important for suspected **meningococcal septicaemia**, addressing **circulatory compromise** with fluid boluses takes precedence in the initial management of **septic shock**. - Ensuring adequate **perfusion** through fluid resuscitation is essential for the effective delivery and action of intravenous medications. *Perform lumbar puncture to confirm meningitis* - A **lumbar puncture** is absolutely **contraindicated** in a child presenting with signs of **septic shock**, hemodynamic instability, and a non-blanching rash. - This procedure would dangerously delay life-saving resuscitation and carries a significant risk of **cerebral herniation** in a critically unwell child. *Obtain blood cultures before starting antibiotics* - Although obtaining **blood cultures** is crucial for pathogen identification, it should never delay immediate life-saving interventions such as **fluid boluses** and empirical antibiotics in the context of suspected **septic shock** and purpuric rash. - The priority is to stabilize the child's condition, and cultures can be drawn concurrently with or immediately after initiating emergency treatment. *Administer intramuscular benzylpenicillin stat* - **Intramuscular antibiotics** like benzylpenicillin are typically recommended in the **pre-hospital setting** or when **intravenous access** cannot be rapidly secured. - Since intravenous access has already been obtained, the **intravenous route** is preferred for both rapid fluid administration and subsequent antibiotic delivery due to faster onset of action.

Question 136: A 20-month-old child presents with a 4-day history of fever up to 39.7°C. On examination, there is bilateral non-purulent conjunctivitis, a maculopapular rash on the trunk and limbs, strawberry tongue, and indurated swelling of both hands and feet. Blood tests show: WBC 18.5 × 10⁹/L, neutrophils 14.2 × 10⁹/L, CRP 145 mg/L, ESR 78 mm/hr, albumin 32 g/L, ALT 65 U/L, platelets 298 × 10⁹/L. There is no cervical lymphadenopathy. How should this patient be classified and managed?

A. Incomplete Kawasaki disease; treat with IVIG and aspirin immediately (Correct Answer)
B. Atypical viral infection; treat supportively and observe
C. Complete Kawasaki disease; treat with IVIG and aspirin immediately
D. Possible Kawasaki disease; await day 5 of fever before treatment
E. Drug reaction; stop any medications and give antihistamines

Explanation: ***Incomplete Kawasaki disease; treat with IVIG and aspirin immediately*** - The child presents with fever for 4 days and four out of five principal features (conjunctivitis, rash, oral changes, and extremity changes), but lacks **cervical lymphadenopathy**, fitting the criteria for **incomplete Kawasaki disease**. - Highly elevated **inflammatory markers** (CRP 145 mg/L, ESR 78 mm/hr, leukocytosis, hypoalbuminemia) strongly support the diagnosis and necessitate immediate treatment with **IVIG and aspirin** to prevent **coronary artery aneurysms**. *Atypical viral infection; treat supportively and observe* - The specific constellation of symptoms, including **strawberry tongue**, **indurated hand and foot swelling**, and markedly elevated **inflammatory markers**, goes beyond what is typically seen in an atypical viral infection. - Observing without treatment carries a significant risk of **cardiac complications**, which is unacceptable given the high suspicion for Kawasaki disease. *Complete Kawasaki disease; treat with IVIG and aspirin immediately* - **Complete Kawasaki disease** requires at least **5 days of fever** along with 4 out of 5 principal diagnostic criteria; this child has only had fever for 4 days. - While the treatment approach (IVIG and aspirin) would be correct, the classification of **complete Kawasaki disease** is inaccurate based on the fever duration and number of criteria. *Possible Kawasaki disease; await day 5 of fever before treatment* - Given the significant clinical findings (4 criteria) and alarming **laboratory evidence** of systemic inflammation, the diagnosis is more than just

Question 137: An 8-year-old boy presents to the emergency department with acute asthma. He has respiratory rate 35/min, oxygen saturations 93% on air, heart rate 125 bpm, and peak flow 55% of his best. He is speaking in short phrases. He receives back-to-back salbutamol and ipratropium nebulisers with oxygen, and oral prednisolone. After 1 hour, his observations are: respiratory rate 32/min, oxygen saturations 94% on 2L oxygen, heart rate 118 bpm, peak flow 60% predicted. What is the most appropriate next step?

A. Discharge home with asthma action plan and steroid course
B. Transfer immediately to paediatric intensive care unit
C. Admit to paediatric ward for continued nebulised bronchodilators (Correct Answer)
D. Administer intravenous salbutamol infusion
E. Give intravenous aminophylline loading dose

Explanation: ***Admit to paediatric ward for continued nebulised bronchodilators*** - Admission is necessary because the patient still requires **supplemental oxygen** to maintain saturations and has a peak flow below **75% of predicted/best** after initial therapy. - He remains in the **acute severe asthma** category despite initial nebulizers, requiring transition to a tapering schedule of **nebulised bronchodilators** (e.g., every 1 4 hours). *Discharge home with asthma action plan and steroid course* - Discharge is inappropriate as the child is still **oxy-dependent** and has not achieved a stable peak flow of >75% for at least 4 hours. - Home management is only safe once the patient can maintain **saturations >94% on air** and has transitioned successfully to **spacer-delivered inhalers**. *Transfer immediately to paediatric intensive care unit* - PICU transfer is reserved for **life-threatening** features such as **silent chest**, cyanosis, exhaustion, or **SpO2 <92%** despite high-flow oxygen. - This patient is **speaking in phrases** and shows a partial response to treatment, indicating he does not currently meet criteria for intensive care. *Administer intravenous salbutamol infusion* - **Intravenous salbutamol** is a second-line therapy for patients with **life-threatening asthma** or those failing to respond to repeated nebulized therapy. - The patient is currently showing a **positive response** to nebulizers (improved peak flow and heart rate), so escalating to IV bronchodilators is not yet indicated. *Give intravenous aminophylline loading dose* - **Aminophylline** is typically considered in children who are **unresponsive** to repeated nebulized bronchodilators and IV magnesium sulfate. - Due to its **narrow therapeutic index** and the patient clinical improvement on standard therapy, it is not the most appropriate next step.

Question 138: A 6-year-old girl presents with a 5-day history of fever (maximum 40.1°C), rash, bilateral non-purulent conjunctivitis, red cracked lips, and cervical lymphadenopathy. Echocardiography shows coronary artery dilation with Z-score of +3.5. She has already received one dose of intravenous immunoglobulin (IVIG) 2 g/kg 36 hours ago but remains febrile at 38.9°C. CRP remains elevated at 92 mg/L. What is the most appropriate next step in management?

A. Administer second dose of IVIG 2 g/kg (Correct Answer)
B. Start oral aspirin at anti-inflammatory dose only
C. Give intravenous methylprednisolone
D. Commence infliximab therapy
E. Continue current management and observe for further 24 hours

Explanation: ***Administer second dose of IVIG 2 g/kg*** - This patient has **IVIG-resistant Kawasaki disease**, defined as persistent or recurrent fever at least **36 hours** after the completion of the initial IVIG infusion. - Retreatment with a **second dose of IVIG** (2 g/kg) is the standard first-line recommendation to reduce the risk of further **coronary artery aneurysm** progression. *Start oral aspirin at anti-inflammatory dose only* - While aspirin is a component of Kawasaki management, it is primarily used for its **anti-thrombotic** and anti-inflammatory properties and cannot alone resolve **IVIG resistance**. - Relying solely on aspirin in the presence of **coronary artery dilation** (Z-score +3.5) would be insufficient to prevent progressive vasculitis. *Give intravenous methylprednisolone* - Pulse **methylprednisolone** is often reserved as a second-line or third-line option if the patient fails to respond to a **second dose of IVIG**. - Although used earlier in high-risk patients by some protocols, standard guidelines prioritize the **IVIG retreatment** before transitioning to systemic steroids. *Commence infliximab therapy* - **Infliximab** (a TNF-alpha inhibitor) is an effective adjunctive therapy for refractory cases but is typically used after **IVIG retreatment failure**. - It is not the universal first step for initial resistance unless specific institutional protocols or contraindications to more IVIG exist. *Continue current management and observe for further 24 hours* - Delaying treatment in a child with **persistent fever** and a high **CRP** (92 mg/L) increases the risk of worsening **coronary artery lesions**. - Observation is inappropriate once the 36-hour mark from the first IVIG dose has passed and the patient remains clinically symptomatic.

Question 139: A 3-year-old child with asthma is being assessed following an acute exacerbation that required hospital admission. The parents report that before this episode, the child was waking at night with cough 3-4 times per week and needed salbutamol inhaler most days. The child is currently on salbutamol as needed only. What is the most appropriate modification to the treatment plan according to BTS/SIGN guidance?

A. Add montelukast as the first-line preventer therapy
B. Start paediatric low-dose inhaled corticosteroid (Correct Answer)
C. Add long-acting beta-agonist to current therapy
D. Increase salbutamol to regular four times daily dosing
E. Start oral prednisolone maintenance therapy

Explanation: ***Start paediatric low-dose inhaled corticosteroid*** - Inhaled corticosteroids (ICS) are the **first-line preventer therapy** for children with symptoms requiring regular treatment or those who have had a recent **hospital admission** due to asthma. - This child's symptoms (nocturnal cough 3-4 times/week, salbutamol most days) and recent hospitalization indicate **poorly controlled asthma**, necessitating daily controller therapy. *Add montelukast as the first-line preventer therapy* - **Leukotriene receptor antagonists (LTRAs)** like montelukast are generally considered **second-line** preventer therapy or an alternative for specific phenotypes, such as viral-induced wheeze, according to BTS/SIGN guidelines. - While effective for some, **ICS** are more consistently efficacious and recommended as the initial controller medication for most children with persistent asthma. *Add long-acting beta-agonist to current therapy* - **Long-acting beta-agonists (LABAs)** should not be used as monotherapy and are typically added to **inhaled corticosteroids** if asthma remains uncontrolled on ICS alone. - As the child is currently only on a short-acting beta-agonist (SABA) as needed, initiating a LABA without prior ICS is not in line with the **step-wise management** of asthma. *Increase salbutamol to regular four times daily dosing* - **Salbutamol** is a **short-acting reliever medication** and should only be used on an **as-needed basis** to alleviate acute symptoms. - Regular, fixed-dose use of salbutamol does not address the underlying **airway inflammation** in asthma and is associated with poor disease control and increased risk of exacerbations. *Start oral prednisolone maintenance therapy* - **Oral corticosteroids** are reserved for the management of **severe refractory asthma** and for short courses during acute exacerbations. - They are not appropriate for initial or routine maintenance therapy in a child with this presentation, particularly when **inhaled corticosteroids** have not been tried.

Question 140: A 5-month-old infant is brought to the emergency department with fever of 38.8°C for 8 hours. The baby appears well, is feeding normally, and examination is entirely normal apart from the fever. A clean-catch urine sample shows: leucocytes ++, nitrites +, protein +, and blood +. The parents are anxious and want to take the baby home. What is the most appropriate management?

A. Discharge with safety-netting advice and await urine culture results
B. Prescribe oral trimethoprim and arrange outpatient follow-up
C. Admit for intravenous antibiotics and full septic screen (Correct Answer)
D. Repeat urine sample to confirm the findings before treatment
E. Prescribe oral amoxicillin and arrange paediatric outpatient review

Explanation: ***Admit for intravenous antibiotics and full septic screen*** - For infants aged **3 to 6 months** who present with a **febrile urinary tract infection (UTI)**, guidelines recommend serious consideration for **hospital admission** and parenteral treatment. - A **full septic screen** (including blood cultures) is required due to the increased risk of **bacteremia** and potential for rapid clinical deterioration in young infants. *Discharge with safety-netting advice and await urine culture results* - Discharging a young infant with a **positive dipstick** (leucocytes and nitrites) and fever is unsafe as it delays necessary treatment for a potential acute infection. - Waiting for **culture results** without starting empiric therapy increases the risk of **renal scarring** and systemic sepsis in this age group. *Prescribe oral trimethoprim and arrange outpatient follow-up* - While oral antibiotics are used for older children, febrile infants under **6 months** often require **IV antibiotics** initially to ensure adequate serum levels. - **Trimethoprim** has significant resistance rates and is not considered first-line for an empiric **febrile UTI** where parenteral therapy is indicated. *Repeat urine sample to confirm the findings before treatment* - The initial **clean-catch sample** was already positive for both **nitrites and leucocytes**, which has high specificity for a UTI. - Delaying treatment to repeat the sample is unnecessary and risky given the infant's **pyrexia** and age. *Prescribe oral amoxicillin and arrange paediatric outpatient review* - **Amoxicillin** is generally avoided as empiric monotherapy due to high rates of **E. coli resistance**. - Outpatient review is inappropriate for a febrile 5-month-old with suspected **pyelonephritis** or systemic involvement requiring urgent inpatient stabilization.

Question 141: A 2-year-old boy with viral-induced wheeze is brought to hospital with increased work of breathing. His respiratory rate is 45/min, oxygen saturations 91% on air, and he has moderate subcostal recession. He has had three similar episodes in the past 6 months, all associated with viral infections. His growth is normal and there is no family history of atopy. He receives salbutamol nebuliser with oxygen and shows good response with saturations improving to 96%. What is the most appropriate ongoing management plan?

A. Prescribe salbutamol inhaler via spacer to use as needed for wheeze episodes (Correct Answer)
B. Start regular inhaled corticosteroid (beclometasone) twice daily
C. Prescribe montelukast daily as maintenance therapy
D. Arrange skin prick allergy testing to identify triggers
E. Start regular long-acting beta-agonist (salmeterol) therapy

Explanation: ***Prescribe salbutamol inhaler via spacer to use as needed for wheeze episodes*** - This child presents with **episodic viral wheeze**, characterized by recurrent wheezing episodes exclusively triggered by viral infections, with no symptoms between episodes and no features of atopy. - For **episodic viral wheeze**, the most appropriate management is a **short-acting beta-agonist (SABA)** like salbutamol, delivered via a spacer, to be used only as needed for acute symptoms, given his good response. *Start regular inhaled corticosteroid (beclometasone) twice daily* - **Inhaled corticosteroids (ICS)** are primarily indicated for children with **multi-trigger wheeze** or asthma, especially those with interval symptoms or atopy, indicating chronic airway inflammation. - In this case, the wheeze is purely **viral-induced** and episodic, meaning there is no ongoing inflammation to target with daily ICS. *Prescribe montelukast daily as maintenance therapy* - **Montelukast**, a leukotriene receptor antagonist, might be considered in some cases of frequent or severe viral wheeze, but it is not typically the first-line discharge treatment for uncomplicated episodic viral wheeze without other indications. - Given the child is well between episodes and responds acutely to salbutamol, continuous daily **maintenance therapy** with montelukast is generally not required. *Arrange skin prick allergy testing to identify triggers* - **Allergy testing** is not indicated here, as the history clearly points to **viral infections** as the sole trigger for wheeze, and there are no features of atopy (e.g., eczema, family history, or other allergic symptoms). - The absence of **atopic features** and the clear viral trigger make allergy testing unlikely to yield relevant management information in this specific scenario. *Start regular long-acting beta-agonist (salmeterol) therapy* - **Long-acting beta-agonists (LABAs)** are not recommended as **monotherapy** due to safety concerns and are typically used in combination with an **inhaled corticosteroid** for persistent asthma in older children or adults. - LABAs are generally not appropriate for the management of **episodic viral wheeze** in young children, which requires on-demand relief of acute symptoms rather than daily control.

Question 142: A 4-year-old girl presents with a 3-day history of fever up to 39.6°C, sore throat, and reduced oral intake. On examination, she appears unwell with temperature 39.2°C, heart rate 140 bpm, respiratory rate 28/min, and oxygen saturations 97% on air. She is drooling, has marked tender bilateral cervical lymphadenopathy, and examination of the throat reveals bilateral tonsillar enlargement with exudate. She has trismus and is unable to open her mouth fully. What is the most appropriate immediate management?

A. Prescribe oral penicillin V and arrange outpatient follow-up
B. Arrange urgent ENT assessment for possible peritonsillar abscess (Correct Answer)
C. Perform lateral neck X-ray to exclude retropharyngeal abscess
D. Administer single dose intramuscular dexamethasone and discharge
E. Give oral ibuprofen for analgesia and observe for 2 hours

Explanation: ***Arrange urgent ENT assessment for possible peritonsillar abscess*** - The presence of **trismus** (difficulty opening the mouth) and **drooling** in a child with severe tonsillitis and systemic symptoms are classic signs of a **peritonsillar abscess (Quinsy)**. - This condition is an emergency requiring prompt **ENT evaluation** for potential **drainage** (aspiration or incision) and initiation of intravenous antibiotics to prevent airway compromise. *Prescribe oral penicillin V and arrange outpatient follow-up* - Oral antibiotics are insufficient for a patient with signs of a deep space infection and systemic illness, especially with **trismus** and **drooling** indicating a potential abscess. - The child's overall unwell appearance, high fever, and reduced oral intake necessitate **hospital admission** for intravenous fluids and parenteral antibiotics, not outpatient management. *Perform lateral neck X-ray to exclude retropharyngeal abscess* - While a **retropharyngeal abscess** is a differential, the prominent **tonsillar enlargement with exudate** and **trismus** point more strongly towards a peritonsillar abscess. - Imaging, particularly X-rays, may not be definitive and should not delay urgent surgical consultation for a potentially life-threatening **airway emergency**. A **CT scan with contrast** is more appropriate if a deep space infection is suspected. *Administer single dose intramuscular dexamethasone and discharge* - Dexamethasone may reduce inflammation but does not address the underlying **bacterial infection** or the mechanical obstruction caused by a **peritonsillar abscess**. - Discharging a child who is unwell, drooling, and has **trismus** is unsafe due to the significant risk of **airway obstruction** and worsening infection. *Give oral ibuprofen for analgesia and observe for 2 hours* - While analgesia is important for comfort, it does not treat the serious underlying pathology of a **deep space neck infection** and potential abscess. - Observing a patient with these red flag symptoms for only 2 hours is inadequate and delays definitive **medical and surgical management** required for a rapidly progressing infection.

Question 143: What is the recommended oxygen saturation target for children with acute asthma exacerbation receiving supplemental oxygen therapy?

A. ≥88%
B. ≥90%
C. ≥92%
D. ≥94% (Correct Answer)
E. ≥98%

Explanation: ***≥94%***- According to **BTS/SIGN guidelines**, the recommended oxygen saturation target for children during an **acute asthma exacerbation** is **≥94%**.- Maintaining this level ensures adequate **tissue oxygenation** while primary treatments like **bronchodilators** and **corticosteroids** work to relieve the airway obstruction.*≥88%*- This lower threshold is generally reserved for patients at risk of **hypercapnic respiratory failure**, such as those with **COPD** or **cystic fibrosis**.- In **acute pediatric asthma**, targeting such a low saturation could lead to significant **hypoxemia** and end-organ stress.*≥90%*- While 90% is a common general threshold, it is generally considered too low for optimal management of **acute pediatric asthma exacerbations**.- Current guidelines advocate for a higher target to ensure better outcomes and prevent complications from **hypoxemia**.*≥92%*- Although closer to the recommended target, **≥92%** still falls slightly below the optimal saturation aim for children with **acute asthma**.- Achieving a higher saturation of ≥94% provides a better safety margin for **respiratory stability** and reduces the risk of **clinical deterioration**.*≥98%*- Aiming for **≥98%** oxygen saturation is generally unnecessary and can even be detrimental in some situations due to the risks of **hyperoxia**.- **Hyperoxia** can lead to **resorption atelectasis**, increased **oxidative stress**, and potentially compromise the patient's respiratory drive.

Question 144: A 16-month-old child presents to the emergency department with a temperature of 39.4°C for 18 hours. On examination, there is bilateral conjunctival injection without exudate, a polymorphous rash on the trunk, bilateral cervical lymphadenopathy with one node measuring 1.8 cm, cracked red lips, and swollen hands. Blood tests show: WBC 16.2 × 10⁹/L, CRP 85 mg/L, ESR 62 mm/hr, platelets 420 × 10⁹/L. What is the most important investigation to arrange urgently?

A. Blood cultures prior to antibiotic therapy
B. Echocardiography to assess coronary arteries (Correct Answer)
C. Throat swab for bacterial culture
D. Lumbar puncture to exclude meningitis
E. Abdominal ultrasound to assess for hydrops of gallbladder

Explanation: ***Echocardiography to assess coronary arteries***- The clinical presentation of fever, **bilateral conjunctival injection without exudate**, **polymorphous rash**, **bilateral cervical lymphadenopathy**, **cracked red lips**, and **swollen hands** is highly suggestive of **Kawasaki disease**.- Urgent echocardiography is essential as **coronary artery aneurysms** are the most serious complication of Kawasaki disease, requiring prompt identification to guide therapy and prevent long-term cardiac morbidity.*Blood cultures prior to antibiotic therapy*- While fever and elevated inflammatory markers (WBC, CRP, ESR) can indicate infection, the specific constellation of symptoms strongly points to **Kawasaki disease** rather than typical bacterial sepsis.- Although cultures are important in febrile children, they are not the *most urgent* investigation given the immediate risk of **coronary artery damage** in Kawasaki disease, which requires prompt cardiac assessment and treatment.*Throat swab for bacterial culture*- This investigation is typically performed to rule out **Group A Streptococcus** infections, such as **scarlet fever**, which can share features like rash and pharyngitis with Kawasaki disease.- However, a throat swab does not address the critical risk of **coronary artery pathology** inherent to Kawasaki disease, making it less urgent than cardiac imaging.*Lumbar puncture to exclude meningitis*- While high fever is present, the absence of clear meningeal signs and the prominent **mucocutaneous manifestations** divert suspicion away from primary bacterial meningitis.- Although Kawasaki disease can cause **aseptic meningitis**, performing a lumbar puncture is not the most urgent diagnostic step compared to evaluating for **cardiac complications**.*Abdominal ultrasound to assess for hydrops of gallbladder*- **Hydrops of the gallbladder** is a known, though less common, complication of Kawasaki disease, often presenting with right upper quadrant pain.- While it can be seen, it is usually self-limiting and rarely causes significant long-term morbidity, making it far less critical to assess urgently than the **coronary arteries**.

Question 145: A 7-year-old boy with known asthma is brought to the emergency department with acute breathlessness. He is using accessory muscles, has oxygen saturations of 92% on air, heart rate 130 bpm, and peak expiratory flow rate (PEFR) 45% of predicted. Despite receiving three back-to-back salbutamol nebulisers with oxygen and ipratropium bromide, his clinical condition shows minimal improvement. What is the most appropriate next step in management?

A. Administer intravenous magnesium sulphate (Correct Answer)
B. Arrange immediate transfer to paediatric intensive care unit
C. Give oral prednisolone 30 mg
D. Continue salbutamol nebulisers hourly
E. Request chest X-ray before further treatment

Explanation: ***Administer intravenous magnesium sulphate***- The patient's condition (PEFR 45% predicted, SpO2 92%, accessory muscle use, tachycardia) indicates **acute severe asthma** that is not responding to initial intensive nebulised bronchodilator therapy (three back-to-back salbutamol with ipratropium).- **Intravenous magnesium sulphate** is recommended as the next line of treatment in children with acute severe asthma who show poor response to initial inhaled bronchodilators, acting as a **bronchodilator** by relaxing bronchial smooth muscle.*Arrange immediate transfer to paediatric intensive care unit*- **PICU referral** is typically considered for patients with **life-threatening asthma** or those who fail to respond to maximal emergency department treatment, including intravenous bronchodilators.- While consultation with PICU may be initiated early in severe cases, administering the next crucial medical intervention like **IV magnesium** is the immediate priority to stabilize the patient.*Give oral prednisolone 30 mg*- **Systemic corticosteroids** (e.g., prednisolone) are a fundamental part of acute asthma management and should be administered early, ideally upon arrival, to reduce inflammation.- However, given the failure to respond to initial bronchodilators and ongoing severe symptoms, the most appropriate *next step* is to escalate **bronchodilatory therapy** intravenously, rather than solely relying on oral steroids at this stage of non-response.*Continue salbutamol nebulisers hourly*- The patient has already received **intensive back-to-back salbutamol** and ipratropium with minimal improvement, indicating refractoriness to this regimen.- Simply continuing hourly nebulisers is insufficient and delays the necessary escalation to more potent **intravenous bronchodilators**, risking further deterioration into respiratory failure.*Request chest X-ray before further treatment*- A **chest X-ray** is not routinely recommended in the management of acute asthma unless specific complications like **pneumothorax**, consolidation, or foreign body aspiration are suspected.- Prioritizing imaging over immediate medical interventions for **bronchoconstriction** in a severely unwell child can dangerously delay life-saving treatment.

Question 146: A 9-year-old girl with poorly controlled asthma presents with wheeze and breathlessness. She uses salbutamol frequently and beclometasone 200 micrograms twice daily. Review of her technique shows she uses her MDI without a spacer and doesn't hold her breath after inhaling. Peak flow is 60% of her predicted best. After correcting inhaler technique and optimizing current therapy, what would be the most appropriate step in her management plan according to BTS/SIGN guidelines?

A. Add montelukast as adjunct therapy
B. Increase beclometasone to 400 micrograms twice daily
C. Add long-acting beta-agonist (LABA) such as salmeterol (Correct Answer)
D. Add oral theophylline
E. Switch to combination inhaler containing ICS and LABA

Explanation: ***Add long-acting beta-agonist (LABA) such as salmeterol*** - According to **BTS/SIGN guidelines** for children aged 5–12 years, adding a **LABA** is the preferred next step (Step 3) for patients whose asthma is poorly controlled on **low-dose ICS** (400 mcg/day beclometasone equivalent). - If the addition of a LABA provides some benefit but control remains inadequate, the **ICS dose** should then be increased or a **Leukotriene Receptor Antagonist (LTRA)** added. *Add montelukast as adjunct therapy* - **Montelukast (LTRA)** is typically considered at Step 3 only if there is no response to a **LABA** or as an alternative if LABA is not tolerated. - Current guidelines prioritize the addition of a **long-acting bronchodilator** before moving to other adjunct therapies in this age group. *Increase beclometasone to 400 micrograms twice daily* - Increasing to a **medium-dose ICS** (e.g., 800 mcg/day beclometasone) is reserved for Step 4 if Step 3 therapies fail to achieve control. - The guidelines emphasize adding a **LABA** first to avoid the potential side effects associated with higher doses of **inhaled corticosteroids** in children. *Add oral theophylline* - **Theophylline** is considered a Step 4 or Step 5 treatment option for **difficult-to-control asthma**. - Due to its narrow **therapeutic index** and requiring blood level monitoring, it is only used after LABA and increased ICS doses have failed. *Switch to combination inhaler containing ICS and LABA* - While a **combination inhaler** is often used for convenience, the guidelines technically advise **adding a LABA** to existing therapy first to assess the clinical response to the specific drug. - Switching to a combination inhaler usually occurs after the benefit of the **LABA component** has been established and the doses are being consolidated.

Question 147: A 22-month-old child is brought to the emergency department following a brief seizure at home. The parents report the child had been unwell for several hours with fever (measured as 38.9°C at home). The seizure lasted approximately 3 minutes, was generalised tonic-clonic, and self-terminated. The child is now alert, responsive, and interactive. Temperature is now 37.6°C after paracetamol. Neurological examination is normal. The child had a similar episode 8 months ago. What is the most appropriate management?

A. Discharge with safety netting advice and information about febrile seizures (Correct Answer)
B. Admit for lumbar puncture to exclude meningitis
C. Commence prophylactic anticonvulsant therapy
D. Perform urgent CT head to exclude structural abnormality
E. Admit for observation and EEG in the morning

Explanation: ***Discharge with safety netting advice and information about febrile seizures*** - This patient presents with a **simple febrile seizure**, defined as a generalized seizure lasting **less than 15 minutes** that does not recur within 24 hours in a neurologically normal child. - Since the child is now **alert, interactive**, and has a normal clinical examination, they do not require admission and management focuses on **parental education** regarding recurrence risk and seizure first aid. *Admit for lumbar puncture to exclude meningitis* - **Lumbar puncture** is not indicated as the child is over 18 months, is currently **clinically well**, and lacks meningeal signs or bulging fontanelles. - This procedure is generally reserved for cases where there is high clinical suspicion of **meningitis** or the child is persistently lethargic. *Commence prophylactic anticonvulsant therapy* - **Prophylactic anticonvulsants** are not recommended for simple febrile seizures because the potential **side effects** of the medications outweigh the benefits for a benign condition. - These seizures do not cause brain damage, and long-term medication does not prevent the subsequent development of **epilepsy**. *Perform urgent CT head to exclude structural abnormality* - Neuroimaging like a **CT head** is not indicated for simple febrile seizures in the absence of **focal neurological deficits**, trauma, or signs of increased intracranial pressure. - Exposure to **ionizing radiation** should be avoided in children unless there is a clear clinical necessity to rule out an acute intracranial process. *Admit for observation and EEG in the morning* - An **EEG** is not routinely recommended after a simple febrile seizure as it is not predictive of seizure recurrence or the future development of **afebrile seizures**. - Admission is unnecessary for a child who has returned to **neurological baseline** and has a clear underlying source of fever or is otherwise clinically stable.

Question 148: A 13-month-old girl presents to the emergency department with a 4-day history of fever up to 40°C. Her parents report she has been more irritable than usual and has developed a rash today. On examination, she has temperature 38.9°C, heart rate 160/min, and a maculopapular rash predominantly on the trunk. Cardiovascular, respiratory, and abdominal examinations are normal. Blood tests show: Hb 105 g/L, WCC 19.5 × 10⁹/L (neutrophils 14.2), platelets 580 × 10⁹/L, CRP 168 mg/L, ESR 72 mm/hr, sodium 132 mmol/L, albumin 26 g/L. An echocardiogram is performed showing normal coronary arteries. What is the most appropriate management?

A. Intravenous immunoglobulin 2 g/kg as a single infusion
B. Observe for 24 hours and repeat echocardiogram if fever persists
C. Intravenous ceftriaxone for presumed bacterial sepsis
D. Oral prednisolone and follow-up in paediatric clinic
E. Intravenous immunoglobulin 2 g/kg plus high-dose aspirin (30-50 mg/kg/day) (Correct Answer)

Explanation: ***Intravenous immunoglobulin 2 g/kg plus high-dose aspirin (30-50 mg/kg/day)*** - The patient presents with prolonged fever, rash, and specific lab abnormalities (elevated CRP/ESR, leukocytosis, thrombocytosis, hypoalbuminemia, hyponatremia) consistent with **incomplete Kawasaki disease**, especially given the age. - This combination therapy is the **standard of care** for acute Kawasaki disease to reduce inflammation and prevent **coronary artery aneurysms**, the most serious complication. *Intravenous immunoglobulin 2 g/kg as a single infusion* - While **IVIG** is a critical component, it is typically administered in conjunction with **aspirin** to maximize anti-inflammatory and antiplatelet effects and ensure optimal outcomes. - **IVIG monotherapy** is not the recommended initial treatment for the acute phase of Kawasaki disease. *Observe for 24 hours and repeat echocardiogram if fever persists* - Delaying specific treatment for suspected **Kawasaki disease** significantly increases the risk of irreversible **coronary artery damage**, which early intervention aims to prevent. - A **normal echocardiogram** at presentation does not rule out Kawasaki disease, as aneurysms often develop later in the illness course, requiring repeat evaluations as part of follow-up. *Intravenous ceftriaxone for presumed bacterial sepsis* - While bacterial **sepsis** is a differential, the specific constellation of lab findings including **thrombocytosis**, **hypoalbuminemia**, and **hyponatremia**, along with high inflammatory markers, strongly points towards an inflammatory vasculitis rather than typical bacterial sepsis. - Antibiotics will not address the underlying systemic **vasculitis** or prevent the characteristic cardiovascular complications of Kawasaki disease. *Oral prednisolone and follow-up in paediatric clinic* - **Corticosteroids** are not first-line treatment for acute Kawasaki disease; they are generally reserved for cases that are **refractory to IVIG** or for very high-risk patients as adjunctive therapy. - Outpatient follow-up is inappropriate for a child in the acute phase of a systemic **vasculitis** that requires immediate inpatient treatment and monitoring to prevent serious cardiac morbidity.

Question 149: A 5-year-old boy with known asthma is brought to hospital by ambulance. He is receiving nebulised salbutamol via oxygen. On arrival, he has a respiratory rate of 50/min, heart rate 145/min, and oxygen saturations of 88% on 15L oxygen via nebuliser mask. He is drowsy, has silent chest on auscultation, and weak respiratory effort. An arterial blood gas shows: pH 7.18, PaCO2 8.9 kPa, PaO2 7.2 kPa, HCO3 24 mmol/L. What is the most critical next management step?

A. Immediate intravenous magnesium sulphate bolus
B. Urgent anaesthetic review for consideration of intubation and mechanical ventilation (Correct Answer)
C. Intravenous aminophylline loading dose followed by infusion
D. Continue back-to-back nebulised salbutamol and monitor closely
E. Commence non-invasive ventilation with BiPAP

Explanation: ***Urgent anaesthetic review for consideration of intubation and mechanical ventilation*** - This child presents with **near-fatal asthma**, characterized by **hypercapnia (PaCO2 8.9 kPa)**, **respiratory acidosis (pH 7.18)**, and altered consciousness (**drowsy**). - The combination of a **silent chest**, weak respiratory effort, and severe hypoxia despite high-flow oxygen indicates **impending respiratory arrest**, necessitating immediate airway protection and invasive ventilation. *Immediate intravenous magnesium sulphate bolus* - While used in **life-threatening asthma**, this patient has progressed to **near-fatal** status where pharmacological bronchodilators alone are insufficient to reverse respiratory failure. - Delaying definitive airway management to administer magnesium in a patient with a **failing respiratory drive** and high CO2 is unsafe. *Intravenous aminophylline loading dose followed by infusion* - **Aminophylline** is a second-line therapy for severe/life-threatening asthma but has a slow onset and narrow therapeutic index. - In the presence of **type 2 respiratory failure** and exhaustion, it cannot replace the immediate need for **mechanical ventilation**. *Continue back-to-back nebulised salbutamol and monitor closely* - This approach is appropriate for **acute severe asthma**, but the presence of a **silent chest** suggests minimal air entry, meaning nebulized drugs will not reach the small airways. - Monitoring alone is dangerous as the clinical and blood gas parameters indicate the child is already in **decompensated respiratory failure**. *Commence non-invasive ventilation with BiPAP* - **Non-invasive ventilation (BiPAP)** is not standard practice for pediatric acute asthma and can increase the risk of **pneumothorax** due to high pressures. - It is contraindicated in a **drowsy patient** with a poor respiratory drive as it does not guarantee a secure airway or adequate minute ventilation.

Question 150: A 10-month-old infant presents with a 3-day history of coryzal symptoms followed by increasing respiratory distress. On examination, he has subcostal and intercostal recession, respiratory rate 65/min, oxygen saturations 91% on air, and fine inspiratory crackles bilaterally. He is taking only 50% of normal feeds. A chest X-ray shows hyperinflation with patchy infiltrates. What is the most appropriate initial management?

A. Oral amoxicillin and arrange outpatient follow-up
B. Admit for supportive care with supplemental oxygen and nasogastric feeding if required (Correct Answer)
C. Nebulised salbutamol and oral prednisolone
D. Intravenous co-amoxiclav and fluids
E. Chest physiotherapy and inhaled hypertonic saline

Explanation: ***Admit for supportive care with supplemental oxygen and nasogastric feeding if required*** - The infant's presentation with coryzal symptoms, increasing respiratory distress, subcostal/intercostal recession, tachypnoea (RR 65/min), hypoxia (SpO2 91%), and reduced feeding (<75%) are classic features of **severe bronchiolitis**, necessitating **hospital admission**. - Management of bronchiolitis is primarily **supportive**, focusing on maintaining adequate **oxygenation** (supplemental oxygen) and **hydration** (nasogastric feeding if oral intake is insufficient). *Oral amoxicillin and arrange outpatient follow-up* - **Bronchiolitis** is a **viral infection**, predominantly caused by **RSV**, making **antibiotics** like amoxicillin ineffective and inappropriate unless there's a strong suspicion of secondary bacterial infection. - The infant's significant **respiratory distress** and **hypoxia** preclude outpatient management, requiring immediate **hospitalization** for close monitoring and supportive care. *Nebulised salbutamol and oral prednisolone* - **Bronchodilators** (e.g., salbutamol) and **corticosteroids** (e.g., prednisolone) are **not recommended** for acute bronchiolitis as they have consistently shown **no significant benefit** in improving outcomes or reducing hospital stay. - These medications are typically used for conditions like **asthma** or **viral-induced wheeze**, which differ in pathophysiology from bronchiolitis in infants. *Intravenous co-amoxiclav and fluids* - Routine **intravenous antibiotics** (like co-amoxiclav) are **not indicated** for bronchiolitis unless there is clear evidence of a **bacterial co-infection** or sepsis, which is not suggested by the initial presentation. - While fluids are crucial, initial hydration can often be managed via **nasogastric feeding**, reserving intravenous fluids for cases where NG feeding is not tolerated or insufficient. *Chest physiotherapy and inhaled hypertonic saline* - **Chest physiotherapy** is **not routinely recommended** for bronchiolitis as it has not been shown to improve clinical outcomes and may cause **increased distress** and oxygen demand in infants. - The use of **inhaled hypertonic saline** in acute bronchiolitis is **controversial**, and current UK guidelines **do not recommend** its routine use due to insufficient evidence of consistent benefit in the acute setting.

Question 151: A 4-year-old girl presents with acute wheeze and breathlessness. She has had two previous similar episodes, both triggered by viral illnesses. Between episodes, she is completely well with no symptoms. Her mother has eczema and her father has hay fever. Examination shows widespread polyphonic wheeze. Which factor would most strongly support a diagnosis of asthma rather than viral-induced wheeze?

A. Age of 4 years at presentation
B. Personal history of eczema
C. Episodes triggered by viral infections
D. Interval symptoms between viral infections with exercise or night-time cough (Correct Answer)
E. Family history of atopy

Explanation: ***Interval symptoms between viral infections with exercise or night-time cough*** - The presence of **symptoms between viral episodes**, such as wheeze, cough, or breathlessness triggered by non-viral factors like **exercise**, **cold air**, or occurring at **night**, is a key distinguishing feature of **asthma**. - **Viral-induced wheeze** typically presents with symptoms *only* during acute viral respiratory infections, with complete asymptomatic periods in between episodes. *Age of 4 years at presentation* - Preschool wheeze is a broad term encompassing both **viral-induced wheeze** and early-onset **asthma**, making age alone an unreliable differentiator. - While a proportion of children with **viral-induced wheeze** outgrow their symptoms, a significant number of children diagnosed with asthma also present at this age, often with viral triggers initially. *Personal history of eczema* - A personal history of **eczema** is a strong indicator of **atopy**, which is a significant risk factor for developing asthma. - However, many children who experience **viral-induced wheeze** also have atopic tendencies or a family history of atopy, meaning this factor does not definitively rule out viral-induced wheeze. *Episodes triggered by viral infections* - Both **asthma exacerbations** and **viral-induced wheeze** in young children are very commonly triggered by **viral respiratory infections**. - Therefore, the mere fact that episodes are triggered by viral infections does not help differentiate between the two conditions; the pattern of symptoms *outside* of these infections is more critical. *Family history of atopy* - A **family history of atopy** (e.g., mother has eczema, father has hay fever) is a known risk factor for asthma. - However, like personal atopy, it indicates a predisposition but does not provide the specific symptom pattern needed to distinguish asthma from **viral-induced wheeze** where viral triggers are predominant and symptoms are absent between episodes.

Question 152: A 3-year-old boy presents with a 36-hour history of fever (39.1°C) and reduced activity. His parents report he has not urinated for 8 hours. On examination, he has a capillary refill time of 3 seconds centrally, heart rate 155/min, respiratory rate 35/min, and blood pressure 85/50 mmHg. He has cool peripheries and decreased skin turgor. What degree of dehydration does this clinical picture most likely represent?

A. No clinically detectable dehydration (<5%)
B. Mild dehydration (5%)
C. Moderate dehydration (5-10%)
D. Severe dehydration (>10%) (Correct Answer)
E. Hypovolaemic shock (>15%)

Explanation: ***Severe dehydration (>10%)*** - The presence of **marked tachycardia** (155 bpm), **decreased skin turgor**, and a **delayed capillary refill time** (3 seconds) strongly indicates significant intravascular volume depletion, consistent with >10% dehydration. - Clinical features such as **oliguria** (8 hours without urination) and **cool peripheries** are critical signs used to classify dehydration as severe due to compensatory mechanisms failing to maintain adequate perfusion. *No clinically detectable dehydration (<5%)* - This stage typically presents with **no clinical signs**, normal vital signs, and an **immediate capillary refill time (<2 seconds)**. - The child's pronounced symptoms, including **tachycardia**, **delayed CRT**, and **cool peripheries**, clearly rule out minimal dehydration. *Mild dehydration (5%)* - Characterized by **increased thirst** and slightly **dry mucous membranes**, but **normal heart rate** and **capillary refill** are typically maintained. - The patient's signs, such as **cool peripheries** and **marked tachycardia**, are far more severe than those expected in mild dehydration. *Moderate dehydration (5-10%)* - Features often include **sunken eyes** and decreased skin turgor, but **capillary refill** is usually 2-3 seconds and vital signs are less dramatically deranged. - The combination of **marked tachycardia**, **cool peripheries**, and significant **oliguria** indicates a fluid deficit beyond the moderate classification. *Hypovolaemic shock (>15%)* - This is characterized by profound **hypotension** (decompensated shock) and a significantly **altered level of consciousness**, representing a critical failure of compensatory mechanisms. - While severely dehydrated, the child's **blood pressure** (85/50 mmHg) is at the lower end of normal, indicating he is in **compensated shock** rather than full decompensated shock.

Question 153: What is the mechanism of action of ipratropium bromide when used in acute asthma exacerbations in children?

A. Stimulation of beta-2 adrenergic receptors causing bronchodilation
B. Inhibition of phosphodiesterase leading to smooth muscle relaxation
C. Competitive antagonism of muscarinic receptors reducing bronchoconstriction (Correct Answer)
D. Direct relaxation of bronchial smooth muscle through calcium channel blockade
E. Reduction of airway inflammation through inhibition of leukotriene synthesis

Explanation: ***Competitive antagonism of muscarinic receptors reducing bronchoconstriction*** - **Ipratropium bromide** is a short-acting muscarinic antagonist (**SAMA**) that blocks **M3 muscarinic receptors** on bronchial smooth muscle cells. - By preventing **acetylcholine** from binding to these receptors, it inhibits parasympathetic-mediated **bronchoconstriction** and reduces glandular mucus secretion, leading to bronchodilation. *Stimulation of beta-2 adrenergic receptors causing bronchodilation* - This mechanism describes **short-acting beta-agonists (SABAs)** like **albuterol** (salbutamol), which activate beta-2 receptors, leading to increased cAMP and bronchial smooth muscle relaxation. - While SABAs are primary bronchodilators in asthma, ipratropium acts via a different, anticholinergic pathway. *Inhibition of phosphodiesterase leading to smooth muscle relaxation* - This is the mechanism of action for **methylxanthines**, such as **theophylline**, which inhibit phosphodiesterase enzymes, thereby increasing intracellular cAMP levels and promoting bronchodilation. - Methylxanthines have a narrow therapeutic index and are not first-line agents for acute asthma exacerbations in children, unlike ipratropium. *Direct relaxation of bronchial smooth muscle through calcium channel blockade* - While calcium is essential for smooth muscle contraction, **calcium channel blockers** are not used for bronchodilation in acute asthma exacerbations. - The primary pathways for bronchodilation in asthma involve G-protein coupled receptors rather than direct calcium channel blockade. *Reduction of airway inflammation through inhibition of leukotriene synthesis* - This mechanism describes **leukotriene modifiers** (e.g., **montelukast**), which either inhibit leukotriene synthesis or block leukotriene receptors. - These drugs are primarily used for **long-term asthma control** and prevention, not for the rapid reversal of **acute bronchoconstriction** in an exacerbation.

Question 154: A 6-year-old girl with asthma presents with an acute exacerbation. She has received three doses of nebulised salbutamol and ipratropium bromide, oral prednisolone, and oxygen. Her respiratory rate remains 40/min, oxygen saturations 93% on 15L oxygen, and she has a silent chest with minimal wheeze. What is the most appropriate next step in management?

A. Continue nebulisers and reassess in 30 minutes
B. Commence intravenous magnesium sulphate
C. Arrange urgent transfer to intensive care and consider intravenous salbutamol (Correct Answer)
D. Commence intravenous aminophylline infusion
E. Administer intramuscular adrenaline

Explanation: ***Arrange urgent transfer to intensive care and consider intravenous salbutamol***- The presence of a **silent chest**, **persistent hypoxia** (SpO2 93% on 15L oxygen), and failure to respond to multiple initial treatments indicates **life-threatening asthma** and impending respiratory failure.- Urgent **PICU/ICU involvement** is critical as the child is at high risk of **respiratory arrest** and may require intubation and advanced intravenous therapies like **IV salbutamol** or other bronchodilators. *Continue nebulisers and reassess in 30 minutes*- This approach is dangerous as the child has already failed to respond to initial intensive therapies and shows signs of **impending respiratory arrest**.- Delaying escalation of care in the presence of a **silent chest** significantly increases the risk of **fatal hypoxia** and respiratory collapse. *Commence intravenous magnesium sulphate*- While **IV magnesium sulphate** is a standard treatment for severe or life-threatening asthma, this child’s **silent chest** signals a need for a higher level of care, including potential mechanical ventilation, rather than just adding another drug.- Magnesium can still be given, but the priority is to secure a setting for **advanced respiratory support** and continuous monitoring. *Commence intravenous aminophylline infusion*- **IV aminophylline** is a second-line or third-line therapy for refractory asthma due to its narrow therapeutic index and significant side effects such as **arrhythmias** and seizures.- It requires intensive **cardiac monitoring** and should only be initiated after consulting senior clinicians and intensive care specialists, not as the immediate next step for a patient this critical. *Administer intramuscular adrenaline*- **Intramuscular adrenaline** is the first-line treatment for **anaphylaxis**, not typically for acute exacerbations of asthma, unless anaphylaxis is also suspected.- While adrenaline has bronchodilator effects, it is not the standard or most appropriate next step for severe asthma exacerbation compared to escalating to intensive care with IV bronchodilators.

Question 155: A 14-month-old boy presents with a 5-day history of persistent fever (maximum 39.5°C daily). He has bilateral non-purulent conjunctivitis, cracked lips, a polymorphous rash on his trunk, and cervical lymphadenopathy with one node measuring 2cm. His hands and feet appear erythematous and slightly swollen. Blood tests show: WCC 18 × 10⁹/L, CRP 145 mg/L, platelets 520 × 10⁹/L, albumin 28 g/L. What is the most likely diagnosis?

A. Scarlet fever
B. Kawasaki disease (Correct Answer)
C. Measles
D. Staphylococcal toxic shock syndrome
E. Juvenile idiopathic arthritis

Explanation: ***Kawasaki disease*** - This patient meets the diagnostic criteria for **Kawasaki disease**, which requires a persistent fever for at least **5 days** plus four out of five clinical features: conjunctivitis, oral changes (cracked lips), rash, extremity changes (erythema/swelling of hands/feet), and lymphadenopathy. - Lab findings such as **elevated CRP**, **leucocytosis**, **thrombocytosis** (often later in the course), and **hypoalbuminaemia** further support this diagnosis of systemic inflammation and vasculitis. *Scarlet fever* - While it presents with fever and a rash, the **rash has a characteristic sandpaper texture** and conjunctivitis is typically absent. - It is caused by **Group A Streptococcus** and does not usually involve the degree of extremity swelling or prominent cracked lips seen in this case. *Measles* - Presentations usually include a **prodrome of cough, coryza, and conjunctivitis**, along with pathognomonic **Koplik spots** on the buccal mucosa. - The rash in measles typically follows a **cephalocaudal progression** (starting from the head and moving down), rather than being a polymorphous trunk rash. *Staphylococcal toxic shock syndrome* - This is an acute toxin-mediated illness characterized by **rapid-onset hypotension** and multiple organ system failure, which is not described here. - While it involves fever and rash, the patient's stability and the specific involvement of the **cervical lymph nodes and non-purulent conjunctivitis** favor Kawasaki disease. *Juvenile idiopathic arthritis* - **Systemic JIA** involves a daily spiking fever and an evanescent rash, but it lacks the **mucocutaneous constellation** of cracked lips and bilateral non-purulent conjunctivitis. - JIA typically features **objective arthritis** in one or more joints, whereas this child presents with generalized extremity erythema and edema without clear arthritis.

Question 156: A 2-year-old girl presents with a 2-day history of coryzal symptoms and barking cough, worse at night. She has mild chest recession and occasional stridor at rest. Her respiratory rate is 35/min, heart rate 110/min, temperature 37.8°C, and oxygen saturations 98% on air. She is taking fluids normally. What is the most appropriate treatment?

A. Oral dexamethasone 0.15 mg/kg as a single dose (Correct Answer)
B. Nebulised budesonide 2mg
C. Nebulised adrenaline and oral dexamethasone
D. Reassurance and safety netting advice only
E. Oral prednisolone 1-2 mg/kg daily for 3 days

Explanation: ***Oral dexamethasone 0.15 mg/kg as a single dose*** - This patient exhibits signs of **moderate croup**, characterized by a **barking cough** and **stridor at rest**; current guidelines recommend a single dose of oral dexamethasone for all children with croup. - **Dexamethasone** is the preferred corticosteroid due to its longer half-life and clinical evidence showing it reduces the need for hospitalization and additional treatments. *Nebulised budesonide 2mg* - While effective, **nebulised budesonide** is typically reserved for children who are vomiting or unable to tolerate anything **orally**. - It is more distressing for the child than oral administration and has not been shown to be superior to **oral dexamethasone**. *Nebulised adrenaline and oral dexamethasone* - **Nebulised adrenaline** is specifically indicated for **severe croup** involving significant respiratory distress, cyanosis, or impending respiratory failure. - This patient’s normal saturations and mild recession indicate they do not yet require the temporary, rapid-acting reduction in **airway edema** provided by adrenaline. *Reassurance and safety netting advice only* - Although many cases of croup are mild, the presence of **stridor at rest** requires medical intervention beyond simple observation. - Standard of care mandates that even mild cases should receive **corticosteroids** to prevent progression and minimize symptom duration. *Oral prednisolone 1-2 mg/kg daily for 3 days* - **Oral prednisolone** is the standard treatment for **asthma exacerbations**, not the primary choice for managing acute croup. - Studies show **dexamethasone** is more effective in the context of croup due to its higher potency and better **volume-to-dose ratio** for pediatric patients.

Question 157: A 5-year-old boy with asthma presents to the emergency department with an acute exacerbation. He has received 10 puffs of salbutamol via spacer and oral prednisolone 20mg. His respiratory rate is 45/min, heart rate 130/min, oxygen saturations 92% on air. He can speak in short phrases and has widespread wheeze with good air entry bilaterally. What severity classification best describes this presentation?

A. Mild asthma exacerbation
B. Moderate asthma exacerbation
C. Acute severe asthma (Correct Answer)
D. Life-threatening asthma
E. Near-fatal asthma

Explanation: ***Acute severe asthma***- In children aged 2–5 years, **acute severe asthma** is defined by a **respiratory rate >40/min** or a **heart rate >130/min**, both of which are present in this patient.- An **SpO2 ≥92%** combined with the inability to complete sentences in one breath (speaking in **short phrases**) confirms this severity level according to BTS guidelines.*Mild asthma exacerbation*- **Mild asthma** typically presents with minimal symptoms and relatively normal physiological parameters for the child's age.- It lacks the significant **tachypnea** and **tachycardia** observed in this clinical scenario.*Moderate asthma exacerbation*- While **moderate asthma** features an **SpO2 ≥92%**, it does not meet the higher thresholds for respiratory or heart rates seen here.- Stable patients who can **speak reasonably well** and show no severe physiological distress are classified in this category.*Life-threatening asthma*- This classification requires clinical red flags such as **SpO2 <92%**, a **silent chest**, cyanosis, or **exhaustion/altered consciousness**.- This patient maintains **good air entry** and a saturation of 92%, excluding life-threatening status at this time.*Near-fatal asthma*- **Near-fatal asthma** is characterized by a **raised PaCO2** and/or the requirement for **mechanical ventilation**.- This patient is still conscious, talking in phrases, and showing **bilateral air entry**, which does not meet these critical criteria.

Question 158: A 7-month-old infant presents with a 12-hour history of fever (38.5°C) and irritability. On examination, she cries when handled but stops when left alone. There is no rash, and respiratory and abdominal examinations are normal. Urine dipstick shows leucocytes 2+ and nitrites negative. What is the most appropriate next step in management?

A. Treat as urinary tract infection with oral trimethoprim
B. Perform lumbar puncture to exclude meningitis
C. Send urine for microscopy, culture and sensitivity before starting antibiotics (Correct Answer)
D. Reassure parents and arrange review in 24 hours
E. Commence empirical intravenous antibiotics for possible sepsis

Explanation: ***Send urine for microscopy, culture and sensitivity before starting antibiotics*** - In a 7-month-old with **fever without a clear source** and a positive dipstick for **leucocytes**, confirming a **Urinary Tract Infection (UTI)** via culture is essential before initiating treatment. - Because the infant is over 3 months old and clinically stable (only 38.5°C, settles when left alone), there is time to obtain a **clean catch** or **catheter specimen** for accurate diagnosis, crucial for guiding appropriate antibiotic therapy. *Treat as urinary tract infection with oral trimethoprim* - Initiating antibiotics solely based on **isolated leucocytes** on a dipstick is premature, especially with negative nitrites, as leucocytes can be seen in other febrile states or contamination. - A **confirmatory urine culture** is required in infants to precisely identify the causative organism and its sensitivity, preventing empirical overtreatment or inadequate therapy. *Perform lumbar puncture to exclude meningitis* - While the infant is irritable, the absence of other specific signs like a **bulging fontanelle**, neck stiffness, or severe toxicity makes **meningitis** less likely than a UTI given the urine findings. - **Lumbar puncture** is an invasive procedure generally reserved for infants under 3 months with fever, or older infants with clear clinical signs of meningeal irritation or high suspicion of serious bacterial infection. *Reassure parents and arrange review in 24 hours* - Reassurance is inappropriate because the presence of **2+ leucocytes** in the urine of a febrile infant indicates a high probability of infection that warrants immediate investigation. - Failing to investigate a potential **Urinary Tract Infection (UTI)** in an infant can lead to delayed diagnosis, progression of infection, and increased risk of long-term **renal scarring**. *Commence empirical intravenous antibiotics for possible sepsis* - **Empirical intravenous antibiotics** are indicated for infants who appear toxic, are under 3 months with fever, or show signs of **hemodynamic instability** or severe sepsis. - This infant is clinically stable (fever 38.5°C, settles when left alone) and does not exhibit the classic features requiring immediate broad-spectrum IV antibiotic coverage for presumptive **sepsis** at this stage.

Question 159: A 4-year-old boy presents to the emergency department with acute onset of high fever (39.8°C), sore throat, and drooling. He is sitting upright, leaning forward with his neck extended. He appears toxic and has inspiratory stridor. His voice is muffled. Oxygen saturations are 94% on air. What is the most appropriate immediate management?

A. Examine the throat with a tongue depressor to visualise the pharynx
B. Obtain lateral neck X-ray in the radiology department
C. Call senior anaesthetist and ENT surgeon urgently, keep child calm, allow parent to stay (Correct Answer)
D. Administer nebulised adrenaline and oral dexamethasone
E. Take blood cultures and commence intravenous ceftriaxone immediately

Explanation: ***Call senior anaesthetist and ENT surgeon urgently, keep child calm, allow parent to stay*** - The clinical triad of **drooling**, **dysphagia**, and **distress** (often in a **tripod position**) combined with high fever and stridor strongly indicates **acute epiglottitis**, a life-threatening airway emergency. - Immediate management focuses on **securing the airway** in a controlled environment (operating theatre) by a multidisciplinary team to prevent sudden **complete airway obstruction**, while minimizing the child's distress. *Examine the throat with a tongue depressor to visualise the pharynx* - This action is **strictly contraindicated** as any stimulation of the posterior pharynx can trigger a **laryngospasm** and cause fatal **airway collapse** in a child with epiglottitis. - Examination should only be performed by specialists under **general anesthesia** where an artificial airway can be established immediately. *Obtain lateral neck X-ray in the radiology department* - Transporting a child with suspected epiglottitis to a radiology suite is **dangerous** due to the risk of **acute respiratory arrest** away from resuscitation equipment and specialized personnel. - While a "**thumb sign**" may be seen on X-ray, the diagnosis is primarily **clinical**, and imaging should never delay critical airway stabilization. *Administer nebulised adrenaline and oral dexamethasone* - This is the standard treatment for **croup (laryngotracheobronchitis)**, which typically presents with a barking cough and is less toxic than epiglottitis. - These medications are largely **ineffective** for the severe **supraglottic swelling** characteristic of epiglottitis and should not delay definitive airway management. *Take blood cultures and commence intravenous ceftriaxone immediately* - While **intravenous antibiotics** (like ceftriaxone for likely bacterial infection) are eventually necessary, they are **secondary** to maintaining a patent airway. - Invasive procedures like blood draws can increase the child's **distress**, potentially precipitating a total airway obstruction, making airway management the absolute priority.

Question 160: What is the correct definition of a complex febrile seizure?

A. A generalised tonic-clonic seizure lasting more than 15 minutes, or focal features, or recurrence within 24 hours, or incomplete recovery within 1 hour (Correct Answer)
B. Any seizure occurring in a child with fever regardless of duration or characteristics
C. A generalised seizure lasting less than 15 minutes in a child aged between 6 months and 6 years
D. Any seizure associated with fever above 39°C in a child with underlying neurological abnormality
E. Recurrent febrile seizures occurring in different febrile illnesses separated by weeks or months

Explanation: ***A generalised tonic-clonic seizure lasting more than 15 minutes, or focal features, or recurrence within 24 hours, or incomplete recovery within 1 hour***- A **complex febrile seizure** is defined by one or more specific criteria: duration **longer than 15 minutes**, **focal features** at onset or post-ictally, **recurrence** within the same illness period (24 hours), or delayed recovery.- These seizures are associated with a slightly higher risk of developing **epilepsy** (approximately 2-10%) compared to the general population.*Any seizure occurring in a child with fever regardless of duration or characteristics*- This is a broad description of any **febrile seizure**, but it fails to distinguish between the **simple** and **complex** subtypes.- Clinical management and prognosis significantly differ based on whether the seizure meets the specific **complex** criteria.*A generalised seizure lasting less than 15 minutes in a child aged between 6 months and 6 years*- This describes a **simple febrile seizure**, which is the most common type and generally carries a benign prognosis.- Simple seizures must also be **non-focal** and not recur within the same **24-hour** febrile episode.*Any seizure associated with fever above 39°C in a child with underlying neurological abnormality*- The presence of an **underlying neurological abnormality** may increase the risk of seizures but is not a defining characteristic of a **complex febrile seizure**.- Complex seizures are defined by the **nature and timing** of the seizure event itself, rather than the baseline neurological state or the specific height of the fever.*Recurrent febrile seizures occurring in different febrile illnesses separated by weeks or months*- This scenario describes **recurrent febrile seizures**, which predicts a higher risk of future febrile seizures but does not make the individual episode **complex**.- For a seizure to be complex due to recurrence, the repeat event must happen within the **same 24-hour period** or same febrile illness.

Question 161: Which of the following features is consistent with a diagnosis of viral-induced wheeze rather than asthma in a preschool child?

A. Wheeze occurring only during viral upper respiratory tract infections with symptom-free intervals between episodes (Correct Answer)
B. Nocturnal cough and wheeze occurring independently of viral infections
C. Daily symptoms requiring regular preventer medication
D. Exercise-induced wheeze in the absence of viral infection
E. Strong family history of atopy with elevated IgE and positive skin prick tests

Explanation: ***Wheeze occurring only during viral upper respiratory tract infections with symptom-free intervals between episodes*** - This pattern is the hallmark of **episodic viral wheeze**, where respiratory symptoms are triggered strictly by **viral pathogens** and resolve completely between events. - Unlike asthma, there are **no interval symptoms** (such as night cough or exercise triggers) when the child does not have a cold. *Nocturnal cough and wheeze occurring independently of viral infections* - Symptoms occurring at **night** in the absence of a viral trigger are highly suggestive of **asthma** or multi-trigger wheeze. - This indicates **ongoing airway inflammation** rather than a reactive process limited to acute viral infections. *Daily symptoms requiring regular preventer medication* - **Viral-induced wheeze** is typically managed with **intermittent bronchodilators** as needed, rather than daily controller therapy. - Persistent daily symptoms necessitate **inhaled corticosteroids**, which is progressive toward a management strategy for **early-onset asthma**. *Exercise-induced wheeze in the absence of viral infection* - Wheezing triggered by **physical activity**, laughter, or cold air suggests **bronchial hyper-responsiveness** characteristic of asthma. - In pure viral-induced wheeze, exercise does not typically act as an **independent trigger** outside of the acute illness phase. *Strong family history of atopy with elevated IgE and positive skin prick tests* - These findings indicate an **atopic phenotype**, which significantly increases the probability that the child's wheezing will transition into **chronic asthma**. - Viral-induced wheeze often occurs in children without a strong **personal or family history** of allergic disease or atopy.

Question 162: A 10-year-old boy presents with a 24-hour history of fever (38.9°C), headache, and vomiting. He is photophobic and has mild neck stiffness. There is no rash. He is alert and oriented. Observations show heart rate 110/min, blood pressure 105/65 mmHg, capillary refill time 2 seconds. Blood glucose is 5.2 mmol/L. What is the most appropriate immediate management?

A. Perform lumbar puncture immediately before starting antibiotics to confirm diagnosis
B. Administer intravenous ceftriaxone immediately and perform lumbar puncture when safe to do so (Correct Answer)
C. Obtain blood cultures, start intravenous ceftriaxone, and perform CT head before lumbar puncture
D. Give intravenous dexamethasone before antibiotics to reduce inflammation
E. Administer intravenous aciclovir and ceftriaxone together before lumbar puncture

Explanation: ***Administer intravenous ceftriaxone immediately and perform lumbar puncture when safe to do so*** - In a suspected case of **bacterial meningitis**, the immediate administration of **empirical intravenous antibiotics** like ceftriaxone is the highest priority to improve outcomes and prevent serious complications. - A **lumbar puncture** should not delay antibiotic treatment; it can be performed immediately after the first antibiotic dose or when the patient's condition permits, provided there are no contraindications such as signs of significantly raised intracranial pressure. *Perform lumbar puncture immediately before starting antibiotics to confirm diagnosis* - Delaying **life-saving antibiotics** to perform a lumbar puncture increases the risk of **neurological sequelae** and mortality, even if it might yield a more 'pristine' CSF sample for diagnosis. - In patients with suspected **meningitis**, clinical suspicion warrants urgent treatment, not diagnostic confirmation first. *Obtain blood cultures, start intravenous ceftriaxone, and perform CT head before lumbar puncture* - A **CT head** is generally not required before a **lumbar puncture** in a patient who is alert, oriented, and without focal neurological deficits, signs of **papilledema**, or other indicators of **raised intracranial pressure**. - Performing an unnecessary CT scan would delay the critical **lumbar puncture** and definitive diagnosis. *Give intravenous dexamethasone before antibiotics to reduce inflammation* - **Dexamethasone** is beneficial in reducing complications like **hearing loss** in bacterial meningitis and should be given just before or with the first dose of antibiotics. - However, it is an adjunctive therapy and should **never delay** the primary treatment with **antibiotics**, which targets the infection itself. *Administer intravenous aciclovir and ceftriaxone together before lumbar puncture* - While **aciclovir** is used for suspected **viral encephalitis**, this patient's presentation of fever, headache, photophobia, and neck stiffness, without altered consciousness or focal neurology, is more typical for **bacterial meningitis** requiring urgent specific treatment. - Although empiric antiviral therapy may sometimes be considered, the most immediate and critical intervention is effective **antibiotic coverage** for bacterial meningitis given its rapid progression and high morbidity.

Question 163: An 8-month-old infant born at 32 weeks gestation presents with a 2-day history of cough, nasal congestion, and reduced feeding. The infant has chronic lung disease of prematurity requiring home oxygen 0.1 L/min. On examination, temperature is 37.6°C, respiratory rate 68/min, heart rate 155/min, and oxygen saturation 88% on usual home oxygen. There are bilateral crackles and expiratory wheeze. The infant appears tired. What is the most appropriate management strategy?

A. Start oral antibiotics for bacterial chest infection and continue home oxygen
B. Admit for trial of nebulised hypertonic saline and chest physiotherapy
C. Admit for increased oxygen therapy, nasogastric feeding support, and close monitoring (Correct Answer)
D. Prescribe salbutamol inhaler via spacer and arrange paediatric respiratory clinic review in 48 hours
E. Commence palivizumab prophylaxis and arrange home oxygen increase

Explanation: ***Admit for increased oxygen therapy, nasogastric feeding support, and close monitoring*** - The infant displays **bronchiolitis** with significant risk factors, including **prematurity (32 weeks)** and **chronic lung disease**, necessitating admission for supportive care. - Admission is indicated due to **hypoxia (88% on baseline oxygen)**, tachypnea, and signs of exhaustion which require **nasogastric feeding** and potential respiratory escalation. *Start oral antibiotics for bacterial chest infection and continue home oxygen* - **Bronchiolitis** is primarily a **viral infection** (typically RSV), and antibiotics do not improve outcomes unless there is clear evidence of secondary bacterial pneumonia. - Home management is unsafe here because the infant is already **hypoxic** despite their usual oxygen therapy and shows signs of clinical fatigue. *Admit for trial of nebulised hypertonic saline and chest physiotherapy* - National guidelines (such as **NICE**) do not recommend the routine use of **nebulised hypertonic saline** as it has not been shown to reduce hospital stay length. - **Chest physiotherapy** is not indicated in bronchiolitis and may increase distress in a tired infant with significant respiratory work. *Prescribe salbutamol inhaler via spacer and arrange paediatric respiratory clinic review in 48 hours* - **Salbutamol** is ineffective in bronchiolitis because the underlying pathology is **airway edema** and mucus plugging rather than smooth muscle bronchospasm. - Delaying care for 48 hours is dangerous; this infant is **acutely unwell** and at high risk for rapid respiratory failure. *Commence palivizumab prophylaxis and arrange home oxygen increase* - **Palivizumab** is a monoclonal antibody used for **prophylaxis** to prevent RSV; it is not an effective treatment once an infection is established. - Increasing oxygen at home is insufficient as it fails to address the infant's **reduced feeding**, increased work of breathing, and the need for **clinical monitoring**.

Question 164: A 7-year-old girl with known asthma presents to the emergency department with an acute exacerbation. She is unable to complete sentences, has a respiratory rate of 32/min, heart rate 128/min, and oxygen saturation 93% in air. She has received three back-to-back salbutamol and ipratropium nebulisers with oxygen, and oral prednisolone 30mg, but continues to have severe respiratory distress with widespread wheeze. What is the most appropriate next step in management?

A. Intravenous magnesium sulphate 40 mg/kg over 20 minutes (Correct Answer)
B. Intravenous aminophylline loading dose 5 mg/kg over 20 minutes
C. Commence continuous salbutamol nebulisers
D. Intravenous salbutamol infusion 5 micrograms/kg/minute
E. Proceed to intubation and mechanical ventilation

Explanation: ***Intravenous magnesium sulphate 40 mg/kg over 20 minutes***- The patient presents with **severe acute asthma exacerbation** (unable to complete sentences, high RR/HR, SpO2 93%) refractory to initial bronchodilator therapy (multiple nebulisers) and oral corticosteroids.- **Intravenous magnesium sulphate** is a potent **bronchodilator** that acts by relaxing bronchial smooth muscle and is indicated as a crucial next step in severe acute asthma in children who do not respond to initial management.*Intravenous aminophylline loading dose 5 mg/kg over 20 minutes*- **Aminophylline** is a **methylxanthine** that can be used for severe asthma, but it is typically considered a second-line intravenous agent after magnesium sulphate.- It has a **narrow therapeutic index** and requires careful monitoring of serum levels and cardiac function due to potential **toxicity** (arrhythmias, seizures), making it less preferred as an immediate next step compared to magnesium.*Commence continuous salbutamol nebulisers*- While **continuous nebulisation** with salbutamol is an option for moderate to severe asthma, this patient has already received three back-to-back doses and continues to have severe distress.- At this point of **refractory severe asthma**, systemic therapy like intravenous magnesium sulphate is indicated to achieve a more rapid and sustained bronchodilation.*Intravenous salbutamol infusion 5 micrograms/kg/minute*- **Intravenous salbutamol** is an alternative systemic bronchodilator, but it is generally reserved for patients who do not respond to both nebulised bronchodilators and **intravenous magnesium sulphate**.- It carries a higher risk of **side effects** such as tachycardia, arrhythmias, and hypokalemia, making magnesium sulphate a safer and often more effective initial intravenous choice.*Proceed to intubation and mechanical ventilation*- **Intubation and mechanical ventilation** are extreme measures for **life-threatening asthma**, reserved for patients with impending respiratory failure (e.g., exhaustion, silent chest, rising CO2, severe hypoxia despite maximal therapy).- This patient is severely distressed but has not yet failed all **pharmacological interventions**, and there are still medical options like IV magnesium sulphate to attempt before resorting to invasive ventilation.

Question 165: A 3-year-old boy presents with acute onset respiratory distress. He was playing with small toys when he suddenly started coughing violently, became distressed, and developed stridor. On examination, he is sitting forward, drooling, has audible inspiratory stridor, and appears frightened. Oxygen saturation is 92% in air. His temperature is 37.1°C. He has had no preceding illness. What is the most appropriate immediate management?

A. Perform lateral neck radiograph to identify foreign body location before any intervention
B. Nebulised adrenaline and dexamethasone while arranging emergency bronchoscopy
C. Direct laryngoscopy in emergency department to visualise and remove foreign body
D. Allow child to stay in position of comfort, give high-flow oxygen, and arrange urgent transfer to theatre with senior anaesthetist and ENT surgeon present (Correct Answer)
E. Attempt back blows and chest thrusts immediately

Explanation: ***Allow child to stay in position of comfort, give high-flow oxygen, and arrange urgent transfer to theatre with senior anaesthetist and ENT surgeon present***- Sudden onset of **respiratory distress**, stridor, and **drooling** while playing with toys strongly suggests an **upper airway foreign body obstruction**.- Maintaining a **position of comfort** and avoiding agitation is critical to prevent a partial obstruction from becoming a **complete airway obstruction**; definitive removal requires a controlled **theatre environment** with expert personnel.*Perform lateral neck radiograph to identify foreign body location before any intervention*- Radiographs should never delay the management of a child in **acute respiratory distress** or with potential airway compromise.- Many foreign bodies are **radiolucent** (e.g., plastic toy parts or food), meaning a normal X-ray cannot rule out the diagnosis and may provide false reassurance.*Nebulised adrenaline and dexamethasone while arranging emergency bronchoscopy*- These treatments are indicated for **Croup (Laryngotracheobronchitis)**, which typically presents with a **prodromal illness**, fever, and a barking cough rather than sudden onset during play.- **Adrenaline** and **steroids** will not provide clinical benefit for a mechanical obstruction caused by a **foreign body** and will delay appropriate management.*Direct laryngoscopy in emergency department to visualise and remove foreign body*- Attempting **direct laryngoscopy** in an awake or inadequately anesthetized child can trigger **laryngospasm** or cause the object to lodge deeper in the airway, worsening the obstruction.- Airway visualization and foreign body removal must be performed by experts (ENT/Anaesthesia) using **rigid bronchoscopy** in a controlled surgical setting.*Attempt back blows and chest thrusts immediately*- Medical maneuvers like **back blows** and chest thrusts are only indicated for **complete airway obstruction** where the child has an ineffective cough and is becoming cyanotic or unconscious.- In a child who is still **breathing and coughing** (evidenced by stridor and being conscious), these maneuvers may worsen the situation by dislodging the object into a more dangerous position or causing complete obstruction.

Question 166: A 15-month-old boy presents with a 4-day history of fever (maximum 39.8°C). He has been irritable and off his food. His mother has noticed his eyes look red. Examination shows bilateral bulbar conjunctival injection without discharge, an erythematous pharynx, dry cracked lips, and a faint maculopapular rash on the trunk. There is no palpable lymphadenopathy. Urine dipstick shows leucocytes 2+ but no nitrites. Blood tests show WCC 16 x 10⁹/L, CRP 78 mg/L, platelets 398 x 10⁹/L. What is the most appropriate next investigation?

A. Chest radiograph
B. Echocardiogram (Correct Answer)
C. Blood cultures
D. Urine microscopy and culture
E. Throat swab for bacterial culture

Explanation: ***Echocardiogram*** - The patient exhibits features of **Kawasaki disease**, including high fever, **bilateral bulbar conjunctival injection**, dry cracked lips, and a **maculopapular rash**. - An **echocardiogram** is the critical investigation to monitor for **coronary artery aneurysms**, which are the most serious complication of this vasculitis. *Chest radiograph* - This is commonly used to rule out pneumonia in a febrile child but is not diagnostic for **Kawasaki disease**. - It would not provide specific information regarding the **coronary arteries** or systemic inflammation required for this clinical picture. *Blood cultures* - While performed to exclude **sepsis** or bacterial infection in a febrile infant, they do not confirm a diagnosis of **Kawasaki disease**. - The constellation of clinical signs and elevated **CRP** makes an inflammatory vasculitis more likely than a simple bacteremia. *Urine microscopy and culture* - The presence of leucocytes without nitrites suggests **sterile pyuria**, a common finding in **Kawasaki disease** due to urethritis. - While helpful to rule out a **UTI**, it is less critical than evaluating for cardiac complications via echocardiography. *Throat swab for bacterial culture* - This might be used to check for **Group A Streptococcus** (Scarlet fever), which can mimic some Kawasaki symptoms like rash and pharyngitis. - However, **Kawasaki disease** symptoms like non-purulent conjunctivitis and the severe risk of **coronary involvement** make cardiac imaging a higher priority.

Question 167: A 9-month-old infant with bronchiolitis has been admitted for 24 hours. He is in 28% headbox oxygen maintaining saturations of 93-94%. He is taking 60% of normal oral feeds. Respiratory rate is 58/min with mild subcostal recession. Parents are asking when their baby can go home. According to current UK guidelines, which single factor would be the most important criterion that must be met before safe discharge?

A. Oxygen saturations consistently ≥92% in air for 4 hours including during sleep and feeding (Correct Answer)
B. Respiratory rate consistently below 50 breaths per minute
C. Taking at least 75% of normal feeding volumes orally
D. Complete resolution of subcostal recession
E. Apnoea-free for at least 24 hours

Explanation: ***Oxygen saturations consistently ≥92% in air for 4 hours including during sleep and feeding***- According to **NICE guidelines (NG9)**, maintaining **oxygen saturation (SpO2) ≥92%** in room air for at least **4 hours** is the primary safety criterion for discharge for infants with bronchiolitis.- It is essential that these levels are stable during challenging periods such as **sleep** and **feeding** to ensure the infant is no longer at significant risk of respiratory compromise.*Respiratory rate consistently below 50 breaths per minute*- While a high respiratory rate indicates distress, many infants can remain **tachypnoeic** during the recovery phase of bronchiolitis without needing continued hospital care, provided oxygenation is stable.- There is no specific **numerical cutoff** for respiratory rate that acts as the single most important mandatory discharge threshold if other criteria, especially oxygenation, are met.*Taking at least 75% of normal feeding volumes orally*- UK guidelines suggest infants should be able to take **50-75%** of their normal fluid intake to be considered for discharge, but **adequate hydration** is secondary to stable oxygenation as the most important factor.- If an infant is hydrated and stable on room air, an intake of **60%** (as seen in this patient) may be acceptable depending on overall clinical judgment and the ability to maintain hydration at home.*Complete resolution of subcostal recession*- **Mild work of breathing**, such as subcostal recession, can persist for many days or even weeks after acute bronchiolitis and does not always preclude safe discharge.- The priority is that the **work of breathing** has significantly improved compared to admission, rather than being completely absent, assuming oxygenation is stable.*Apnoea-free for at least 24 hours*- While the absence of **apnoea** is a crucial prerequisite for discharge, it is rarely the most important limiting factor in a **9-month-old** infant with bronchiolitis, unless it was a prominent feature of their admission.- Apnoea is a more common and critical concern for **younger infants** (under 6 weeks corrected gestational age) or those born prematurely.

Question 168: A 5-year-old girl with asthma usually controlled on beclometasone 200 micrograms twice daily presents with an acute exacerbation. She has a respiratory rate of 28/min, heart rate 118/min, oxygen saturation 96% in air, and can speak in full sentences. There is bilateral wheeze on auscultation. Peak expiratory flow is 65% of her best. She has received one salbutamol nebuliser. What defines the severity of this asthma exacerbation?

A. Life-threatening asthma
B. Acute severe asthma
C. Moderate acute asthma (Correct Answer)
D. Mild acute asthma
E. Brittle asthma

Explanation: ***Moderate acute asthma*** - The patient's **peak expiratory flow (PEF) of 65%** of best, ability to **speak in full sentences**, and oxygen saturation of **96%** are all consistent with **moderate acute asthma** in a child over 5 years. - While the respiratory rate (28/min) and heart rate (118/min) are slightly elevated for her age, they do not meet the higher thresholds for severe asthma exacerbation (e.g., RR >30/min, HR >125/min for this age group). *Life-threatening asthma* - This category is indicated by critical signs such as **silent chest**, **cyanosis**, poor respiratory effort, exhaustion, or **altered consciousness**. - Objective criteria for life-threatening asthma include **SpO2 <92%**, **PEF <33% of best**, or a normal/rising PaCO2, none of which are present in this case. *Acute severe asthma* - **Acute severe asthma** is defined by the **inability to complete sentences** in one breath, a **PEF between 33-50%** of best, or marked clinical signs like accessory muscle use. - Furthermore, objective markers such as a **respiratory rate >30/min** or a **heart rate >125/min** for a child aged 5-11 years are not met by this patient. *Mild acute asthma* - **Mild acute asthma** typically presents with minimal symptoms, a **PEF >80%** of best, and the patient would likely not require immediate nebulised bronchodilators. - The patient's PEF of 65% and the need for a salbutamol nebuliser indicate a more significant exacerbation than mild. *Brittle asthma* - **Brittle asthma** is a term for a **chronic, severe subtype** of asthma characterized by wide and unpredictable fluctuations in peak flow or recurrent, severe, and life-threatening attacks. - It describes a long-term pattern of asthma control rather than the **acute severity** of a single exacerbation.

Question 169: A 2-year-old previously healthy child presents with fever of 40°C for 12 hours. On examination, the child appears lethargic, has a capillary refill time of 4 seconds peripherally, heart rate 165/min, respiratory rate 45/min, and a non-blanching purpuric rash on the trunk and legs. Blood pressure is 75/40 mmHg. What is the single most important immediate intervention?

A. Administer intravenous ceftriaxone 80mg/kg stat
B. Give 20ml/kg intravenous fluid bolus of 0.9% sodium chloride (Correct Answer)
C. Obtain blood cultures and perform lumbar puncture
D. Administer intramuscular benzylpenicillin and arrange immediate transfer
E. Commence inotropic support with dopamine infusion

Explanation: ***Give 20ml/kg intravenous fluid bolus of 0.9% sodium chloride*** - The child presents with signs of **septic shock** (lethargy, tachycardia, prolonged capillary refill, hypotension, purpuric rash), making **fluid resuscitation** the most important immediate step to restore **tissue perfusion**. - Rapid administration of an **isotonic crystalloid** bolus (20ml/kg) is critical in pediatric shock to address **hypovolemia** and stabilize hemodynamics. *Administer intravenous ceftriaxone 80mg/kg stat* - While **early antibiotics** are vital for suspected **sepsis** and **meningococcal disease**, correcting life-threatening **circulatory collapse** with fluids takes precedence in a patient actively in shock. - Antibiotics should be administered as soon as possible, ideally concurrently with or immediately after the initial **fluid bolus**, once resuscitation has begun. *Obtain blood cultures and perform lumbar puncture* - A **lumbar puncture** is **contraindicated** in a child with **hemodynamic instability**, signs of shock, or a rapidly evolving **purpuric rash** due to the risk of cerebral herniation. - Although important for diagnosis, **blood cultures** and other diagnostic tests should never delay the initiation of **emergency fluid resuscitation** and antibiotics in critical patients. *Administer intramuscular benzylpenicillin and arrange immediate transfer* - **Intramuscular benzylpenicillin** is primarily recommended as a **pre-hospital** or **community intervention** when intravenous access is unavailable for suspected meningococcal disease. - In a hospital setting where the child is already in **shock**, **intravenous fluid expansion** and **IV antibiotics** are the immediate standard of care. *Commence inotropic support with dopamine infusion* - **Inotropic support** with agents like **dopamine** is reserved for **fluid-refractory shock**, typically after a patient has received adequate fluid boluses (e.g., 40-60 ml/kg). - Initiating **vasopressors** or **inotropes** before addressing underlying **hypovolemia** can be detrimental and is not the primary immediate intervention for shock.

Question 170: An 18-month-old child presents with fever of 39.5°C for 6 hours. The parents report one brief episode of rhythmic jerking of all limbs lasting approximately 2 minutes, with loss of consciousness and post-ictal drowsiness. The child is now alert and playing. Examination reveals an inflamed right tympanic membrane but is otherwise normal. There is no rash. Developmental history is normal and there is no family history of epilepsy. What is the most appropriate management?

A. Admit for lumbar puncture and intravenous antibiotics pending culture results
B. Prescribe antibiotics for otitis media, provide safety netting advice, and arrange GP follow-up (Correct Answer)
C. Start prophylactic antiepileptic medication and refer to paediatric neurology
D. Arrange urgent EEG and MRI brain as outpatient
E. Admit for 24-hour observation and blood cultures

Explanation: ***Prescribe antibiotics for otitis media, provide safety netting advice, and arrange GP follow-up*** - The child presents with a **simple febrile seizure** (generalized, <15 minutes, single episode) triggered by **acute otitis media**; management focuses on treating the source and parental reassurance. - Since the child is now **alert**, clinically stable, and has no signs of **meningitis**, he can be safely managed in the community with appropriate **safety netting** instructions. *Admit for lumbar puncture and intravenous antibiotics pending culture results* - **Lumbar puncture** is only indicated if there are signs of **meningitis** (e.g., neck stiffness, non-blanching rash) or if the child is persistently lethargic. - This child is currently **alert and playing** with an identifiable focus of infection, making invasive investigations unnecessary. *Start prophylactic antiepileptic medication and refer to paediatric neurology* - **Simple febrile seizures** do not significantly increase the long-term risk of **epilepsy** and do not require long-term antiepileptic therapy. - Referral is usually reserved for **complex febrile seizures** or children with underlying **developmental delay** or neurological abnormalities. *Arrange urgent EEG and MRI brain as outpatient* - An **EEG** is not recommended after a simple febrile seizure as it does not predict the recurrence of seizures or future epilepsy. - **Neuroimaging** is generally unnecessary unless there are focal neurological deficits, signs of **raised intracranial pressure**, or features of a complex seizure. *Admit for 24-hour observation and blood cultures* - Routine admission is not required if the child has fully recovered, is **clinically well**, and there is a clear source of infection like **otitis media**. - **Blood cultures** are not indicated for a simple febrile seizure unless the child appears **septic** or there is no localized source of fever found on examination.

Question 171: A 4-year-old boy with known asthma presents with acute severe breathlessness. He is unable to complete sentences, has a respiratory rate of 42/min, heart rate 140/min, and oxygen saturation 90% in air. He has widespread wheeze and is using accessory muscles. He has received salbutamol 10 puffs via spacer at home without improvement. What is the most appropriate immediate management in the emergency department?

A. High-flow humidified oxygen and intravenous hydrocortisone
B. Salbutamol nebuliser with oxygen, ipratropium bromide nebuliser, and oral prednisolone (Correct Answer)
C. Intravenous salbutamol infusion and intravenous hydrocortisone
D. Salbutamol nebuliser with oxygen and intravenous magnesium sulphate
E. Oxygen, intravenous aminophylline loading dose, and oral prednisolone

Explanation: ***Salbutamol nebuliser with oxygen, ipratropium bromide nebuliser, and oral prednisolone***- This patient presents with **acute severe asthma** (SpO2 90%, HR 140, RR 42, unable to complete sentences), requiring immediate **first-line therapy**.- Guidelines recommend **high-flow oxygen**, frequent **short-acting beta-agonists (SABA)**, **ipratropium bromide** for synergistic bronchodilation, and **corticosteroids** to reduce airway inflammation.*Intravenous salbutamol infusion and intravenous hydrocortisone*- **Intravenous bronchodilators** are reserved for patients with **life-threatening asthma** or those failing to respond to repeated nebulized therapy after initial aggressive management.- **Oral prednisolone** is generally preferred over IV hydrocortisone in children as it is equally effective and less invasive unless the child is vomiting or has very severe, life-threatening asthma.*Salbutamol nebuliser with oxygen and intravenous magnesium sulphate*- **Intravenous magnesium sulphate** is a second-line treatment used for **refractory severe asthma** or life-threatening cases that do not respond to initial nebulizers and corticosteroids.- This option lacks **ipratropium bromide** and **corticosteroids**, which are essential components of the initial comprehensive management bundle for severe exacerbations.*Oxygen, intravenous aminophylline loading dose, and oral prednisolone*- **Aminophylline** is typically used in a **Critical Care** or High Dependency setting for children who are not responding to maximal first- and second-line therapies (including inhaled bronchodilators, steroids, and magnesium).- It has a **narrow therapeutic index** and is not indicated as an immediate first-line management step in the emergency department for severe asthma.*High-flow humidified oxygen and intravenous hydrocortisone*- While oxygen and steroids are necessary, they are insufficient alone for managing **acute bronchospasm** without active **bronchodilators** like salbutamol.- **Humidified oxygen** is not routinely recommended for acute asthma management and should not delay the administration of nebulized medications.

Question 172: A 6-month-old infant is brought to the emergency department with a 3-day history of coryzal symptoms followed by increased work of breathing. On examination, respiratory rate is 65/min, temperature 37.8°C, oxygen saturation 91% in air. There is subcostal recession, nasal flaring, and bilateral expiratory wheeze with fine inspiratory crackles. The child is able to feed but takes smaller volumes. What is the most likely diagnosis?

A. Bronchiolitis (Correct Answer)
B. Viral-induced wheeze
C. Pneumonia
D. First presentation of asthma
E. Aspirated foreign body

Explanation: **Bronchiolitis** - This presentation is classic for **bronchiolitis**, typically caused by **Respiratory Syncytial Virus (RSV)** in infants under 12 months following a viral **coryzal prodrome**. - The clinical hallmarks are **increased work of breathing** (recessions, tachypnea) and the characteristic combination of **bilateral expiratory wheeze** and **fine inspiratory crackles**. *Viral-induced wheeze* - This typically occurs in children **over 1 year of age** and is characterized by **recurrent episodes** of wheezing without the fine crackles seen in bronchiolitis. - It is a diagnosis often made in older toddlers who respond to **bronchodilators**, which are generally ineffective in acute bronchiolitis. *Pneumonia* - Bacterial pneumonia usually presents with a **high-grade fever** (>38.5°C), toxic appearance, and **focal (unilateral) crackles** rather than generalized wheezing. - Unlike bronchiolitis, pneumonia often lacks the initial **coryzal phase** and presents with dullness to percussion or decreased breath sounds over a specific lobe. *First presentation of asthma* - Asthma is **rarely diagnosed** in infants under 12 months, as the airways are physiologically different and the pathology of bronchiolitis (inflammation and mucus) predominates. - A diagnosis of asthma requires evidence of **reversibility** and often a strong personal or family history of **atopy**, which is not the primary suspect in this acute setting. *Aspirated foreign body* - This typically involves a **sudden onset** of choking or coughing in a child who was previously well, rather than a 3-day **viral prodrome**. - Examination usually reveals **unilateral** localized wheeze or reduced breath sounds, as opposed to the **bilateral** chest signs observed in this infant.

Question 173: A 3-year-old girl presents to the emergency department with fever of 39.2°C for 48 hours. Her mother reports she has been miserable, refusing to eat, and has developed a rash today. On examination, she has bilateral non-purulent conjunctivitis, cracked red lips, a strawberry tongue, and a polymorphous maculopapular rash over her trunk. Her cervical lymph nodes are enlarged. What is the most appropriate initial management?

A. Admit for intravenous immunoglobulin and high-dose aspirin (Correct Answer)
B. Prescribe oral antibiotics and arrange follow-up in 48 hours
C. Perform lumbar puncture and start intravenous ceftriaxone
D. Arrange urgent echocardiogram and discharge if normal
E. Prescribe oral steroids and arrange paediatric outpatient review

Explanation: ***Admit for intravenous immunoglobulin and high-dose aspirin*** - The patient meets the diagnostic criteria for **Kawasaki disease**, presenting with fever, **strawberry tongue**, **conjunctivitis**, polymorphous rash, and cervical lymphadenopathy. - Immediate management with **IVIG** and **high-dose aspirin** is crucial to reduce the risk of **coronary artery aneurysms**, which can occur in up to 25% of untreated children. *Prescribe oral antibiotics and arrange follow-up in 48 hours* - Kawasaki disease is a **vasculitis**, not a bacterial infection, and oral antibiotics will not address the underlying inflammation or prevent cardiac complications. - Delaying treatment while awaiting follow-up increases the risk of serious **vascular sequelae** and ignores the clinical signs of a systemic emergency. *Perform lumbar puncture and start intravenous ceftriaxone* - While fever and irritability can occur in **meningitis**, the presence of pathognomonic secondary signs like **cracked lips** and **strawberry tongue** points specifically toward Kawasaki disease. - **Lumbar puncture** is an invasive procedure and is not indicated when the clinical presentation strongly conforms to the **American Heart Association** criteria for Kawasaki disease. *Arrange urgent echocardiogram and discharge if normal* - Although an **echocardiogram** is essential to monitor for coronary artery involvement, a normal initial scan does not rule out the need for urgent treatment. - Patients with suspected Kawasaki disease must be **admitted** for therapy regardless of the initial echo results to prevent future **aneurysm formation**. *Prescribe oral steroids and arrange paediatric outpatient review* - While steroids may be used in IVIG-resistant cases, they are not the **first-line therapy** for initial stabilization of Kawasaki disease. - Outpatient review is inappropriate because the patient requires **continuous monitoring** and rapid administration of IVIG to control systemic **vasculitis**.

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