Pediatric Critical Care — MCQs

Pediatric Critical Care Indian Medical PG Practice Questions and MCQs

Question 101: During pediatric resuscitation, a 5-year-old remains in asystole despite 2 minutes of high-quality CPR and the administration of epinephrine. While continuing CPR, what should be prioritized as the next critical action?

A. Administer atropine
B. Check for reversible causes (Correct Answer)
C. Perform defibrillation
D. Initiate advanced airway management

Explanation: ***Check for reversible causes*** - During ongoing CPR for **asystole**, continuously identifying and treating reversible causes (the **H's and T's**) is crucial for successful resuscitation. - This includes addressing potentially correctable conditions such as **hypoxia**, **hypovolemia**, **hypo/hyperkalemia**, **hypothermia**, **tension pneumothorax**, **tamponade**, **toxins**, and **thrombosis**. - Per **PALS guidelines**, epinephrine should be repeated every 3-5 minutes while simultaneously and continuously searching for and treating reversible causes throughout the resuscitation. - This systematic approach maximizes the chance of achieving return of spontaneous circulation (ROSC). *Administer atropine* - **Atropine** is no longer recommended in pediatric cardiac arrest protocols and has been removed from PALS guidelines. - It has not been shown to improve outcomes in asystole or pulseless electrical activity (PEA). - Its only role in pediatric resuscitation may be for **symptomatic bradycardia** with a pulse. *Perform defibrillation* - **Defibrillation** is only indicated for **shockable rhythms** such as ventricular fibrillation (VF) or pulseless ventricular tachycardia (pVT). - **Asystole** is a non-shockable rhythm; attempting defibrillation would be inappropriate and potentially harmful by interrupting effective CPR. *Initiate advanced airway management* - While securing an **advanced airway** (endotracheal intubation or supraglottic airway) is important during resuscitation, it should not cause significant interruption to chest compressions. - If basic airway management with bag-mask ventilation is providing adequate oxygenation and ventilation, advanced airway placement can be deferred. - The priority remains high-quality CPR, epinephrine administration, and addressing reversible causes, with airway management optimized as resources allow without compromising compressions.

Question 102: What is the most common cause of epistaxis in children?

A. Trauma (Correct Answer)
B. Infection
C. Tumor
D. Hypertension

Explanation: ***Trauma*** - **Nose picking** is the most frequent cause of epistaxis in children, often leading to trauma to **Kiesselbach's plexus** in the anterior nasal septum. - Other traumatic causes include **falls**, **sports injuries**, and insertion of **foreign bodies** into the nose. *Infection* - While **upper respiratory tract infections** can cause nasal mucosal inflammation and dryness, leading to epistaxis, it is not the most common primary cause compared to direct trauma. - Inflammatory conditions like **rhinitis** can make the nasal mucosa more fragile and prone to bleeding. *Tumor* - **Nasal tumors** are a rare cause of epistaxis in children, and bleeding from a tumor often presents with other symptoms like **unilateral nasal obstruction** or **facial swelling**. - While concerning, it is not the typical etiology for recurrent nosebleeds in this age group. *Hypertension* - **Hypertension** is a significant cause of epistaxis in adults, often involving posterior nosebleeds, but it is **rare in children** and thus not a common cause of pediatric epistaxis. - If a child presents with hypertension and epistaxis, an underlying systemic cause should be investigated.

Question 103: A 6-year-old child presents with unilateral purulent nasal discharge and a foul odor. What is the most likely diagnosis?

A. Allergic rhinitis
B. Nasal polyp
C. Foreign body (Correct Answer)
D. Acute sinusitis

Explanation: ***Foreign body*** - **Unilateral purulent nasal discharge** with a **foul odor** in a child is highly suggestive of a nasal foreign body. - Children often insert objects into their nostrils, leading to inflammation, infection, and the described symptoms. *Allergic rhinitis* - Typically presents with **bilateral clear nasal discharge**, sneezing, and nasal itching. - It does not usually cause unilateral purulent discharge or a foul odor. *Nasal polyp* - Usually presents with **bilateral nasal obstruction** and a diminished sense of smell. - While it can be associated with chronic inflammation, it does not typically cause unilateral foul-smelling purulent discharge in a child. *Acute sinusitis* - Characterized by **purulent nasal discharge**, facial pain/pressure, and fever, but it is typically **bilateral** and rarely associated with a distinct foul odor unless there is a severe anaerobic infection. - While possible, the unilateral nature and foul odor make a foreign body more likely in a child.

Question 104: What are the criteria for diagnosing acute respiratory distress syndrome (ARDS) in a child?

A. PaO2/FiO2 ratio ≤300 mmHg with PEEP ≥5 cmH2O
B. Onset of respiratory symptoms within 7 days of a known clinical insult
C. Respiratory failure not fully explained by other conditions
D. All of the above criteria plus bilateral opacities on chest imaging and oxygenation criteria are met (Correct Answer)

Explanation: ***All of the above criteria plus bilateral opacities on chest imaging and oxygenation criteria are met*** - The Berlin criteria for ARDS, adapted for pediatric use (PALICC criteria), require the presence of a **known clinical insult** followed by the onset of respiratory symptoms within 7 days. - The diagnosis also requires **bilateral opacities** on chest imaging (not fully explained by effusions, atelectasis, or nodules), and the respiratory failure must not be fully explained by **cardiac failure or fluid overload**. Additionally, specific **oxygenation impairment criteria** (e.g., PaO2/FiO2 ratio or oxygen saturation index) must be met. *Onset of respiratory symptoms within 7 days of a known clinical insult* - This is one of the essential temporal criteria for ARDS, indicating an acute onset following a precipitating event. - However, this criterion alone is insufficient for diagnosis and must be combined with imaging, exclusion of cardiac failure, and oxygenation criteria. *Respiratory failure not fully explained by other conditions* - This criterion is crucial for differentiating ARDS from other causes of respiratory distress, such as cardiac failure or severe asthma. - While necessary, it is not a standalone diagnostic criterion and needs to be met in conjunction with other clinical and physiological findings. *PaO2/FiO2 ratio ≤300 mmHg with PEEP ≥5 cmH2O* - This oxygenation criterion is used to classify the **severity of ARDS** (mild, moderate, severe) in adults and is adapted in pediatric ARDS criteria. - While a key indicator of **hypoxemia**, it is only one component of the full diagnostic criteria, which also include timing, imaging, and exclusion of cardiac issues.

Question 105: Which is the prognostic scoring system for trauma in children?

A. AUDIT
B. CCS
C. Injury severity score
D. Pediatric Trauma Score (Correct Answer)

Explanation: ***Pediatric Trauma Score*** - The **Pediatric Trauma Score (PTS)** is a specific scoring system designed to assess the severity of injury and predict outcomes in injured children. - It considers factors like **weight**, **airway status**, **systolic blood pressure**, **CNS status**, **bone injury**, and presence of **cutaneous injury**. *CCS* - The **Canadian CT Head Rule (CCHR)** is a clinical decision rule used specifically in adults to determine the need for a head CT after minor head injury. - It is not a prognostic scoring system and is not validated for use in children. *AUDIT* - **AUDIT (Alcohol Use Disorders Identification Test)** is a screening tool used to identify hazardous and harmful alcohol consumption, not head injury prognosis. - It has no relevance to the assessment or prognosis of head injuries in any age group. *Injury severity score* - The **Injury Severity Score (ISS)** is a general anatomical scoring system that rates the severity of injuries in multiple body regions, primarily used for adults. - While it can be applied to children, it is not specifically designed for pediatric trauma and does not offer the same prognostic power as age-specific scores like the PTS.

Question 106: A child swallowed a watch battery containing alkaline content. What is the immediate next step?

A. Immediate X-ray examination (Correct Answer)
B. Immediate surgical removal
C. CT scan of the abdomen
D. Administer laxatives

Explanation: ***Immediate X-ray examination*** - An **X-ray** is crucial to confirm the presence, location, and type of battery ingested, as well as to determine if it's lodged in the esophagus, which is a medical emergency. - Button batteries, especially those caught in the esophagus, can cause severe tissue damage within hours due to **electrical discharge** and **alkaline necrosis**. *Immediate surgical removal* - While ultimately necessary for batteries lodged in the esophagus, surgical removal is not the *immediate next step*. **Localization via X-ray** is required before surgical planning. - Surgery is typically reserved for cases where **endoscopic removal** fails or for complications like perforation. *CT scan of the abdomen* - A **CT scan** is not the initial modality of choice for suspected foreign body ingestion due to radiation exposure and less rapid availability compared to X-rays. - CT might be considered if complications such as **perforation** or **abscess formation** are suspected, but not as the first step for object localization. *Administer laxatives* - Administering **laxatives** is contraindicated because it can hasten the battery's transit through the gastrointestinal tract, potentially increasing the risk of impaction or prolonged contact with tissue if the battery is already caught. - If the battery is in the esophagus, laxatives are ineffective and can delay appropriate intervention, worsening potential damage.

Question 107: What is the grade of dehydration if a child demonstrates excessive thirst and decreased urine output?

A. No dehydration
B. Mild dehydration
C. Moderate dehydration (Correct Answer)
D. Severe dehydration

Explanation: ***Moderate dehydration*** - **Excessive thirst** and **decreased urine output** are classic indicators of moderate dehydration. - In moderate dehydration, the child has lost 6-9% of their body weight, presenting with these prominent clinical features. - Other signs include **sunken eyes**, **reduced skin turgor**, **tachycardia**, and the child drinks eagerly when offered fluids. *No dehydration* - This grade implies a child is **well-hydrated** with normal thirst and urine output. - There would be no clinical signs of fluid deficit. *Mild dehydration* - Mild dehydration (3-5% weight loss) presents with **restlessness or irritability** and the child is **thirsty and drinks eagerly**. - However, the thirst is not described as "excessive" and urine output is not significantly decreased yet. - Signs like sunken eyes and reduced skin turgor may be present but are subtle. *Severe dehydration* - Severe dehydration involves **life-threatening symptoms** like **shock**, **capillary refill time >2 seconds**, **lethargy or unconsciousness**, and **absent or minimal urine output**. - The child may be **unable to drink** due to altered consciousness. - This stage represents a fluid deficit of 10% or more of body weight.

Question 108: Most common cause of shock in children

A. Septic shock
B. Hypovolemic shock (Correct Answer)
C. Cardiogenic shock
D. Anaphylactic shock

Explanation: ***Hypovolemic shock*** - In children, the most common cause of shock is **hypovolemia**, often due to **diarrhea** and vomiting leading to significant fluid loss or **hemorrhage** from trauma. - Children have a smaller circulating blood volume relative to their body size, making them more susceptible to shock from even moderate fluid loss. *Septic shock* - While a serious cause of shock in children, **septic shock** is less common than hypovolemic shock globally, particularly in areas with high rates of infectious diarrheal diseases. - It is caused by an overwhelming immune response to an infection, leading to widespread vasodilation and organ dysfunction. *Cardiogenic shock* - This type of shock results from the heart's inability to pump adequate blood despite sufficient intravascular volume, often due to congenital heart disease or myocarditis. - It is a less frequent cause of shock in otherwise healthy children compared to hypovolemia or sepsis. *Anaphylactic shock* - **Anaphylactic shock** is a severe, life-threatening allergic reaction that causes widespread vasodilation and increased capillary permeability. - While it can occur in children, it is typically triggered by specific allergens and is much less common as an overall cause of shock than hypovolemia.

Question 109: A 3-year-old child presents to the ER with a history of vomiting and loose, watery stools for 3 days. On examination, the child is drowsy, has sunken eyes, hypothermia, and slow skin pinch recoil. What is the most likely diagnosis?

A. No dehydration
B. Mild dehydration
C. Some dehydration
D. Severe dehydration (Correct Answer)

Explanation: ***Severe dehydration*** - The child presents with classic signs of **severe dehydration** including **drowsiness**, **sunken eyes**, and **slow skin pinch recoil**, indicating significant fluid loss. - **Hypothermia** can also be a sign of severe dehydration and metabolic derangement in young children, further supporting this diagnosis. *No dehydration* - This option is incorrect because the child exhibits multiple clear signs of fluid deficit, such as **drowsiness** and **sunken eyes**. - A child with no dehydration would typically be **alert**, have **normal eyes**, and **brisk skin turgor**. *Mild dehydration* - Mild dehydration usually involves only a **slight loss of body weight** (e.g., <3-5%) and minimal clinical signs like slight thirst. - The presented symptoms like **drowsiness** and **sunken eyes** are indicative of more advanced dehydration than mild. *Some dehydration* - Some dehydration (also known as moderate dehydration) is characterized by signs such as **restlessness/irritability**, **thirst**, and **eyes that are somewhat sunken**. - The presence of **drowsiness** and **hypothermia** goes beyond the typical presentation of "some dehydration" and points to a more critical state.

Question 110: Which condition is characterized by conjunctival injection, pharyngeal injection, polymorphic rash, and cervical lymphadenopathy?

A. Kawasaki syndrome (Correct Answer)
B. Measles
C. Scarlet fever
D. Mumps

Explanation: ***Kawasaki syndrome*** - **Kawasaki syndrome** is characterized by a constellation of symptoms including **conjunctival injection**, **pharyngeal injection**, a **polymorphic rash**, and **cervical lymphadenopathy**, often described as the CRASH and burn criteria (Conjunctivitis, Rash, Adenopathy, Strawberry tongue, Hand/foot changes, and Fever). - It is an acute systemic vasculitis, primarily affecting young children, and without treatment, it can lead to **coronary artery aneurysms**. *Measles* - Measles is characterized by a maculopapular rash that typically starts on the face and spreads downwards (cephalocaudal), along with the presence of **Koplik spots** on the buccal mucosa. - While it presents with conjunctivitis and rash, the rash is not polymorphic in the same way as Kawasaki, and cervical lymphadenopathy is less prominent. *Scarlet fever* - **Scarlet fever** is caused by Group A Streptococcus and presents with pharyngitis, fever, and a characteristic **sandpaper-like erythematous rash** with circumoral pallor. - While it has pharyngeal involvement and rash, it lacks the **conjunctival injection** and **polymorphic nature of the rash** seen in Kawasaki syndrome. The rash is typically fine and blanching. - Cervical lymphadenopathy may be present but the overall constellation differs from Kawasaki. *Mumps* - Mumps is an acute viral infection primarily characterized by the swelling of the **parotid glands** (parotitis), often accompanied by fever, headache, and malaise. - It does not typically present with conjunctival injection, a polymorphic rash, or prominent cervical lymphadenopathy as seen in Kawasaki syndrome.

Practice by Chapter

Respiratory Failure

Practice Questions

Shock

Practice Questions

Cardiopulmonary Resuscitation

Practice Questions

Acute Respiratory Distress Syndrome

Practice Questions

Mechanical Ventilation in Children

Practice Questions

Sedation and Analgesia

Practice Questions

Status Epilepticus

Practice Questions

Diabetic Ketoacidosis

Practice Questions

Pediatric Trauma

Practice Questions

Poisoning and Toxidromes

Practice Questions

Near-Drowning

Practice Questions

Multiple Organ Dysfunction Syndrome

Practice Questions

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