Pediatric Critical Care — MCQs

Pediatric Critical Care Indian Medical PG Practice Questions and MCQs

Question 91: During pediatric CPR, if a child remains unresponsive after 2 minutes of high-quality CPR in the context of cardiac arrest, what is the next appropriate action?

A. Continue CPR and reassess every 2 minutes
B. Administer epinephrine (Correct Answer)
C. Attempt defibrillation
D. Insert an advanced airway

Explanation: ***Administer epinephrine*** - After 2 minutes of **high-quality CPR** without response in pediatric cardiac arrest, assuming **vascular access** (IV/IO) has been established, the next critical step is to administer **epinephrine** to improve coronary and cerebral perfusion. - According to **PALS guidelines**, epinephrine should be given as soon as vascular access is obtained in **non-shockable rhythms** (asystole/PEA), and after the second unsuccessful defibrillation in **shockable rhythms** (VF/pVT). - Epinephrine is a potent **alpha-adrenergic agonist** that increases **coronary perfusion pressure** and improves the likelihood of **return of spontaneous circulation (ROSC)**. - The dose is **0.01 mg/kg (0.1 mL/kg of 1:10,000 solution)** IV/IO, repeated every **3-5 minutes** during the arrest. *Continue CPR and reassess every 2 minutes* - While **continuous high-quality CPR** is the foundation of cardiac arrest management, it must be combined with appropriate **pharmacological interventions** and **rhythm assessments**. - Simply continuing CPR without medication after 2 minutes would delay essential interventions and reduce the chance of successful resuscitation. - CPR should continue throughout the resuscitation, but other interventions must be integrated at appropriate intervals. *Attempt defibrillation* - Defibrillation is indicated specifically for **shockable rhythms**: ventricular fibrillation (VF) or pulseless ventricular tachycardia (pVT). - The question does not specify the cardiac rhythm, and **shockable rhythms are less common** in pediatric cardiac arrest (only 5-15% of cases). - For **non-shockable rhythms** (asystole or PEA, which constitute 85-95% of pediatric arrests), defibrillation is not indicated and epinephrine is the priority medication. - If the rhythm were shockable, defibrillation would have been attempted during the initial 2 minutes of CPR. *Insert an advanced airway* - While securing an **advanced airway** (endotracheal tube or supraglottic airway) is part of pediatric cardiac arrest management, it should **not interrupt high-quality CPR**. - Current **PALS guidelines** emphasize that effective **bag-mask ventilation** is often sufficient initially, and advanced airway placement should be performed only when it can be done without significant interruption to chest compressions. - **Medication administration** takes priority over advanced airway placement if vascular access is available, as improving perfusion is more critical in the immediate post-arrest period. - Advanced airway insertion is typically considered after initial drug therapy has been initiated or if bag-mask ventilation is inadequate.

Question 92: A 6-month-old infant presents with a high fever, irritability, and a bulging fontanelle. Which immediate intervention is the most appropriate?

A. Lumbar puncture to evaluate for meningitis
B. Administer intravenous antibiotics immediately and perform lumbar puncture after stabilization (Correct Answer)
C. Oral antipyretics and outpatient follow-up
D. CT scan of the head to evaluate for intracranial pressure

Explanation: ***Correct: Administer intravenous antibiotics immediately and perform lumbar puncture after stabilization*** - The clinical presentation of **high fever, irritability, and bulging fontanelle** in a 6-month-old infant is highly suggestive of **bacterial meningitis**. - **Bulging fontanelle** is a sign of **increased intracranial pressure (ICP)**, which is a **relative contraindication to immediate lumbar puncture** due to the risk of cerebral herniation. - **Current pediatric guidelines** recommend: Start **empiric IV antibiotics immediately** (after blood cultures if possible) when meningitis is suspected, especially with signs of increased ICP. - **Lumbar puncture should be delayed** until the patient is stabilized and ICP concerns are addressed. Common empiric regimen for this age: **ceftriaxone + vancomycin** (± ampicillin if <1 month). - **Time is critical** - every hour of delay in antibiotic administration increases mortality and morbidity in bacterial meningitis. *Incorrect: Lumbar puncture to evaluate for meningitis* - While LP is essential for **definitive diagnosis** of meningitis, performing it immediately in the presence of a **bulging fontanelle (increased ICP)** risks **cerebral herniation**, a life-threatening complication. - **Antibiotics should never be delayed** while waiting for LP in suspected bacterial meningitis with signs of increased ICP. - LP can be safely performed after stabilization and resolution of increased ICP signs. *Incorrect: Oral antipyretics and outpatient follow-up* - This option is **dangerous** as it ignores the serious signs of possible meningitis. - The infant requires **immediate hospitalization**, diagnostic evaluation, and empiric antibiotic therapy. - Outpatient management could lead to rapid deterioration, seizures, shock, or death from untreated bacterial meningitis. *Incorrect: CT scan of the head to evaluate for intracranial pressure* - CT scan may be indicated if there are **focal neurological signs, papilledema, or altered consciousness** to rule out mass lesions or abscess before LP. - However, **CT should not delay antibiotic administration** in suspected meningitis. - A bulging fontanelle alone is a clinical sign of increased ICP; CT confirmation is not required before starting antibiotics. - In this scenario, **antibiotics are the priority**, not imaging.

Question 93: A 4-year-old child presents with a high fever, rash, conjunctivitis, and swelling of the hands and feet. Laboratory findings show thrombocytosis and elevated inflammatory markers. What is the most likely diagnosis?

A. Kawasaki disease (Correct Answer)
B. Scarlet fever
C. Measles
D. Rheumatic fever

Explanation: ***Kawasaki disease*** ✓ * This is the correct diagnosis characterized by **high fever (>5 days)**, **bilateral non-exudative conjunctivitis**, **polymorphous rash**, and **extremity changes** (swelling of hands and feet) in a young child. * **Thrombocytosis** (typically in the second week) and **elevated inflammatory markers** (ESR, CRP) are classic laboratory findings. * Kawasaki disease is a **medium-vessel vasculitis** requiring prompt treatment with **IVIG and aspirin** to prevent coronary artery aneurysms. *Scarlet fever* * Caused by **Group A Streptococcus** producing erythrogenic toxin, presenting with fever and a characteristic **fine, sandpaper-like rash**. * Key differentiators: **strawberry tongue**, **circumoral pallor**, and **Pastia's lines** in skin creases—not the prominent conjunctivitis or hand/feet swelling seen here. * Thrombocytosis is not a typical feature in the acute phase. *Measles* * Presents with **prodromal symptoms** (cough, coryza, conjunctivitis—the "3 Cs"), followed by **Koplik spots** on buccal mucosa, then a **maculopapular rash** spreading cephalocaudally. * Does **not cause extremity swelling** or significant thrombocytosis. * The rash pattern and lack of hand/feet edema distinguish it from Kawasaki disease. *Rheumatic fever* * A **delayed complication** (2-4 weeks post-infection) of Group A streptococcal pharyngitis, diagnosed using **modified Jones criteria**. * Major criteria include **carditis, migratory polyarthritis, chorea, erythema marginatum**, and **subcutaneous nodules**—none of which match this acute presentation. * Does **not present with conjunctivitis or hand/feet swelling** as primary features.

Question 94: What is the best immediate intervention for a conscious infant who is choking and unable to cry?

A. Back blows and chest thrusts (Correct Answer)
B. Finger sweep
C. Initiate CPR
D. Heimlich maneuver

Explanation: ***Back blows and chest thrusts*** - For a **conscious infant** with severe airway obstruction, **cycles of five back blows and five chest thrusts** are the recommended immediate intervention. - This technique helps to dislodge the foreign object by creating a sudden increase in **intrathoracic pressure**. *Finger sweep* - A **finger sweep** should only be performed if the **foreign object is clearly visible** in the infant's mouth. - Blind finger sweeps can push the object further into the airway, worsening the obstruction. *Initiate CPR (if unresponsive)* - **CPR** is indicated if the infant becomes **unresponsive** during the choking episode, indicating cardiac arrest. - Since the infant is described as **conscious**, CPR is not the immediate first step. *Heimlich maneuver* - The **Heimlich maneuver** (abdominal thrusts) is recommended for **children over one year of age** and adults. - It is **not recommended for infants** due to the risk of causing internal injury to their delicate organs.

Question 95: A 5-month-old infant presents with vomiting, diarrhea, and signs of dehydration. On examination, the infant has a sunken fontanelle and poor skin turgor. What is the next best step in management?

A. Oral rehydration solution (Correct Answer)
B. Intravenous fluids
C. Antibiotics
D. Antidiarrheal medications

Explanation: ***Oral rehydration solution*** - The presence of a **sunken fontanelle** and **poor skin turgor** indicates **some dehydration (moderate dehydration)** according to WHO classification. - **Oral rehydration solution (ORS)** is the **first-line treatment** for moderate dehydration as per WHO and IAP guidelines (Plan B therapy). - ORS should be given at **75 ml/kg over 4 hours** with close monitoring for improvement or deterioration. - ORS is effective, safe, and preferred over IV therapy when the child can drink and does not have severe dehydration or shock. *Intravenous fluids* - IV fluids are indicated for **severe dehydration** (lethargy, shock, inability to drink, unconsciousness) or **failure of ORS therapy**. - The clinical signs described (sunken fontanelle, poor skin turgor) without mention of shock, lethargy, or inability to drink suggest moderate, not severe dehydration. - Jumping directly to IV fluids bypasses the safer, equally effective, and less invasive ORS therapy. *Antibiotics* - Antibiotics are not indicated unless there is evidence of a **bacterial infection** such as bloody diarrhea or positive stool culture. - Most cases of acute diarrhea in infants are **viral** (rotavirus, norovirus) and self-limiting. - Routine antibiotic use may lead to resistance and disrupt normal gut flora. *Antidiarrheal medications* - **Antidiarrheal medications are contraindicated in infants** as per WHO and AAP guidelines. - They can prolong infection by preventing pathogen clearance and may cause serious complications like **ileus** or **toxic megacolon**. - Treatment focuses on rehydration, not stopping diarrhea.

Question 96: A 1-year-old child accidentally inhales a small piece of food and begins choking. The child is conscious but cannot cough effectively. What is the most appropriate immediate intervention?

A. Start chest compressions
B. Attempt to remove the object manually
C. Give back blows and chest thrusts
D. Perform abdominal thrusts (Correct Answer)

Explanation: ***Perform abdominal thrusts*** - For a **conscious child aged 1 year or older** who is choking and cannot cough effectively, **abdominal thrusts (Heimlich maneuver)** are the recommended primary intervention according to PALS and AHA guidelines. - This maneuver creates artificial coughs to dislodge the foreign body from the airway. - The technique involves standing/kneeling behind the child, placing a fist above the navel, and delivering quick upward thrusts. - **Note:** Some guidelines recommend alternating **5 back blows with 5 abdominal thrusts** until the obstruction is relieved. *Start chest compressions* - **Chest compressions** are primarily used for **cardiac arrest or unconscious choking victims** when CPR is initiated, not as a first-line intervention for a foreign body airway obstruction in a conscious child. - If the child becomes unconscious, then CPR with chest compressions should be started. *Give back blows and chest thrusts* - **Back blows and chest thrusts** are the recommended sequence specifically for **infants under 1 year of age** who are choking. - For children **1 year and older**, the intervention changes to **abdominal thrusts** (with or without preceding back blows depending on the guideline). - This combination of back blows with chest thrusts is not appropriate for a 1-year-old child. *Attempt to remove the object manually* - **Blind finger sweeps** are strongly contraindicated as they can push the object further down the airway, worsening the obstruction. - Manual removal is only indicated if the object is **clearly visible** and easily reachable without risk of pushing it deeper.

Question 97: What is the most appropriate first aid for an infant who is choking?

A. Back blows and chest thrusts (Correct Answer)
B. Mouth-to-mouth ventilation
C. Chest compressions
D. Abdominal thrusts

Explanation: ***Back blows and chest thrusts*** - For infants (under 1 year) who are choking, the recommended first aid involves a sequence of **five back blows** followed by **five chest thrusts** [1]. - This combination helps to dislodge the foreign object by creating pressure and vibrations in the airway. *Mouth-to-mouth ventilation* - This technique is part of **cardiopulmonary resuscitation (CPR)** and is used when a person is not breathing, not for active choking with an obstructed airway. - Applying mouth-to-mouth ventilation in a choking infant would likely force the object further into the airway or be ineffective due to obstruction. *Chest compressions* - **Chest compressions** are primarily used during CPR when an infant is unresponsive and not breathing, to circulate blood. - While chest thrusts (a modified form of chest compressions) are used for choking infants, isolated chest compressions without back blows are not the complete first aid for choking. *Abdominal thrusts* - **Abdominal thrusts** (Heimlich maneuver) are recommended for children over 1 year and adults who are choking. - This technique is not recommended for infants due to the risk of damaging their delicate internal organs.

Question 98: During a pediatric advanced life support (PALS) course, the proper sequence of CPR for a single rescuer managing an unresponsive child in cardiac arrest is taught. What is the correct sequence according to current AHA guidelines?

A. Circulation, Airway, Breathing (Correct Answer)
B. Breathing, Circulation, Airway
C. Airway, Circulation, Breathing
D. Airway, Breathing, Circulation

Explanation: ***Circulation, Airway, Breathing (C-A-B)*** - According to **current AHA PALS guidelines (2020)**, the C-A-B sequence is recommended for ALL rescuers performing CPR, including single rescuers managing pediatric cardiac arrest. - **Chest compressions** should be initiated first to minimize delays in restoring circulation, followed by opening the **airway** and providing **rescue breaths**. - This sequence applies to both adults and children to ensure early and effective chest compressions, which are critical for survival. - The emphasis on early compressions helps maintain coronary and cerebral perfusion pressure during cardiac arrest. *Airway, Circulation, Breathing* - This sequence does not align with current PALS guidelines. - Delaying chest compressions to establish airway first can compromise outcomes in cardiac arrest. *Airway, Breathing, Circulation (A-B-C)* - This was the **traditional sequence used before 2010** but is no longer recommended for CPR in cardiac arrest. - The A-B-C sequence may still be appropriate for **witnessed respiratory arrest** where cardiac arrest has not yet occurred, but this is not the standard CPR sequence. - Current guidelines prioritize early chest compressions (C-A-B) for established cardiac arrest. *Breathing, Circulation, Airway* - This sequence is incorrect as it attempts to provide breathing before ensuring an open airway, which is physiologically ineffective. - Additionally, it delays chest compressions, which are the priority in cardiac arrest.

Question 99: You find a 5-year-old child unresponsive and not breathing in a public park. After ensuring the scene is safe, what is the most appropriate first action in pediatric basic life support (BLS)?

A. Start chest compressions immediately
B. Shout for help and activate emergency response (Correct Answer)
C. Check for a pulse for no more than 10 seconds
D. Open the airway using the head-tilt-chin-lift maneuver

Explanation: ***Shout for help and activate emergency response*** - For a **single rescuer** finding an unresponsive, non-breathing child in a public setting, the **first action** after ensuring scene safety is to **shout for help and activate emergency medical services (EMS)**. - According to **AHA pediatric BLS guidelines**, early activation of EMS is critical because advanced care and defibrillation are essential for survival, and a lone rescuer cannot provide prolonged effective CPR alone. - After activating EMS (or sending someone to do so), immediately begin CPR starting with chest compressions following the **C-A-B sequence** (Compressions-Airway-Breathing). *Start chest compressions immediately* - While chest compressions are the cornerstone of CPR and should be started **as soon as possible**, they should come **immediately after** activating emergency response in a single-rescuer scenario. - Starting compressions without ensuring EMS has been activated risks prolonged CPR without advanced support, reducing survival chances. - The principle is: **"Phone first" for single rescuers** finding unresponsive children, then start CPR. *Open the airway using the head-tilt-chin-lift maneuver* - Airway opening is part of the **A** in C-A-B sequence and comes **after starting chest compressions**. - It is performed to deliver rescue breaths after approximately 30 compressions in the 30:2 compression-to-ventilation ratio. - Opening the airway first would delay the critical steps of EMS activation and compressions. *Check for a pulse for no more than 10 seconds* - Pulse checks are part of the assessment but should not delay EMS activation or compressions. - For **lay rescuers**, pulse checks are often unreliable and not emphasized; **healthcare providers** may check pulse briefly but should not delay compressions beyond 10 seconds if uncertain. - In a child who is unresponsive and not breathing, the priority is activating EMS and starting CPR, not spending time on pulse assessment.

Question 100: Which clinical sign is the most reliable for diagnosing severe dehydration in a child?

A. Prolonged capillary refill time (Correct Answer)
B. Sunken eyes
C. Dry mouth
D. Increased heart rate

Explanation: ***Prolonged capillary refill time*** - A **capillary refill time (CRT)** of more than **3 seconds** is a critical indicator of **severe circulatory compromise** and poor peripheral perfusion in children with severe dehydration. - CRT directly reflects **hemodynamic status** and tissue perfusion, making it a valuable sign for assessing the severity of hypovolemia requiring urgent fluid resuscitation. - In the context of **dehydration-induced shock**, prolonged CRT indicates the need for immediate intervention. *Sunken eyes* - **Sunken eyes** are a highly sensitive and specific sign of dehydration in children and are consistently included in WHO dehydration assessment scales. - This sign is reliable for identifying dehydration but is **equally present in both moderate and severe dehydration**, making it less specific for determining hemodynamic compromise. - While important for diagnosis, it provides less information about **circulatory status** compared to CRT. *Dry mouth* - **Dry mucous membranes** indicate reduced fluid status but are a **nonspecific sign** that can be influenced by mouth breathing, fever, or ambient humidity. - This sign appears early in dehydration but does not reliably correlate with severity or the need for urgent intervention. - Less useful for differentiating between **moderate and severe dehydration**. *Increased heart rate* - **Tachycardia** is an early compensatory mechanism to maintain cardiac output in hypovolemia but has **low specificity** for dehydration. - Heart rate elevation can result from multiple causes including fever, pain, anxiety, or other systemic conditions. - While sensitive, it is **not specific enough** to be the most reliable indicator of severe dehydration alone.

Practice by Chapter

Respiratory Failure

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Shock

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Cardiopulmonary Resuscitation

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Acute Respiratory Distress Syndrome

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Mechanical Ventilation in Children

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Sedation and Analgesia

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Status Epilepticus

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Diabetic Ketoacidosis

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Pediatric Trauma

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Poisoning and Toxidromes

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Near-Drowning

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Multiple Organ Dysfunction Syndrome

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