Pediatric Critical Care Practice Questions

Q: What is the recommended endotracheal concentration of adrenaline during CPR in pediatric patients?

1:1,000. **Explanation:** In pediatric resuscitation, the preferred routes for adrenaline administration are intravenous (IV) or intraosseous (IO). However, if vascular access cannot be established, the **endotracheal (ET) route** is used. **1. Why 1:1,000 is Correct:** The standard IV/IO dose of adrenaline is **0.01 mg/kg** using the **1:10,000** concentration. However, drug absorption via the ET route is unpredictable and significantly less efficient than the IV route. To achieve comparable plasma levels, the **PALS (Pediatric Advanced Life Support) guidelines** recommend a much higher ET dose: **0.1 mg/kg**. To avoid delivering an excessive volume of fluid into the lungs, this higher dose is administered using the concentrated **1:1,000 (1 mg/ml)** preparation. **2. Why Incorrect Options are Wrong:** * **Option C (1:10,000):** This is the standard concentration used for **IV/IO** administration. Using this for the ET route would require 10 times the volume, potentially causing surfactant washout or interfering with gas exchange. * **Options A & B (1:10 lakhs / 1:1 lakh):** These are highly dilute concentrations (often used in local anesthesia with lidocaine) and are insufficient for cardiac arrest resuscitation. **High-Yield Clinical Pearls for NEET-PG:** * **ET Dose Rule of Thumb:** The ET dose of adrenaline is **10 times** the IV dose (0.1 mg/kg vs. 0.01 mg/kg). * **Administration:** After ET instillation, follow with several positive-pressure breaths to ensure peripheral distribution. * **Drugs via ET Tube (LEAN/NAVEL):** Remember the mnemonic **LEAN** (Lidocaine, Epinephrine, Atropine, Naloxone) or **NAVEL** (+ Vasopressin) for drugs that can be given endotracheally. * **Preferred Route:** Always prioritize IO access over ET if IV access fails, as IO pharmacokinetics are identical to IV.

Q: What is the daily maintenance fluid requirement for a child weighing 10 kg?

1000 ml/day. The calculation of maintenance fluids in pediatrics is based on the **Holliday-Segar Formula**, which estimates caloric expenditure and associated water loss. This is a high-yield concept for NEET-PG. ### **Explanation of the Correct Answer** According to the Holliday-Segar rule (100-50-20 rule), daily fluid requirements are calculated based on body weight: * **First 10 kg:** 100 ml/kg/day * **Next 10 kg (11–20 kg):** Add 50 ml/kg/day * **Each kg above 20 kg:** Add 20 ml/kg/day For a child weighing **10 kg**, the calculation is: $10\text{ kg} \times 100\text{ ml/kg} = \mathbf{1000\text{ ml/day}}$. ### **Analysis of Incorrect Options** * **Option B (800 ml/day):** This underestimates the requirement. 80 ml/kg is often used for calculating fluids in the early neonatal period (Day 3-4) but is insufficient for a 10 kg infant. * **Option C (500 ml/day):** This is significantly low (50 ml/kg) and would lead to dehydration and electrolyte imbalances in a healthy 10 kg child. * **Option D (1200 ml/day):** This exceeds the standard maintenance. 1200 ml would be the requirement for a **14 kg** child ($1000\text{ ml for first 10 kg} + 4 \times 50\text{ ml for the remaining 4 kg}$). ### **High-Yield Clinical Pearls for NEET-PG** 1. **Hourly Rate Shortcut:** To find the hourly infusion rate, use the **4-2-1 rule**: 4 ml/kg for the first 10 kg, 2 ml/kg for the next 10 kg, and 1 ml/kg thereafter. For this child: $10 \times 4 = 40\text{ ml/hr}$. 2. **Fluid Choice:** Isotonic solutions (e.g., 0.9% Normal Saline in D5) are now preferred over hypotonic solutions (like 0.18% saline) to prevent hospital-acquired hyponatremia. 3. **Exceptions:** Maintenance fluids should be reduced in conditions like SIADH, renal failure, or congestive heart failure.

Q: A 15-month-old girl has a history of poor oral fluid intake, occasional vomiting, rapid breathing, and decreased urine output. Physical examination reveals a pulse of 150/min, BP of 120/80, and a respiratory rate of 60/min. There are bibasilar rales, and the liver is palpable. Which of the following procedures might be helpful in evaluating the oliguria, EXCEPT?

Giving a fluid challenge with isotonic saline, 20 ml/kg. **Explanation:** The clinical presentation of this 15-month-old girl—tachycardia (150/min), tachypnea (60/min), bibasilar rales, and a palpable liver—is diagnostic of **Congestive Heart Failure (CHF)**. In this context, the oliguria is likely due to decreased cardiac output and renal perfusion. **1. Why Option A is the correct answer (The "Except"):** In a patient with signs of fluid overload or heart failure (rales and hepatomegaly), giving a **fluid challenge (20 ml/kg of isotonic saline)** is contraindicated. It can acutely worsen pulmonary edema and lead to respiratory failure. While fluid boluses are the standard treatment for hypovolemic shock, they are dangerous in cardiogenic shock or CHF. **2. Analysis of Incorrect Options:** * **Option B (Urine Sodium):** This helps differentiate between pre-renal azotemia (where urine sodium is typically 40 mEq/L), aiding the evaluation of oliguria. * **Option C (BUN and Creatinine):** These are essential baseline markers to assess the degree of renal impairment and the BUN/Creatinine ratio. * **Option D (IV Furosemide):** In the setting of CHF and fluid overload, a diuretic challenge can help determine if the kidneys are responsive and simultaneously treat the underlying pulmonary congestion. **Clinical Pearls for NEET-PG:** * **Hepatomegaly + Respiratory Distress:** In a pediatric patient, this combination should immediately raise suspicion of **Heart Failure**, not just primary lung disease. * **Fluid Management:** Always auscultate the lungs and palpate the liver before giving a fluid bolus. If rales or gallop rhythm are present, avoid aggressive fluid resuscitation. * **Normal BP in Shock:** Note that the BP (120/80) is actually high for a 15-month-old (compensated state); do not wait for hypotension to diagnose critical illness.

Q: Resuscitation of a child with heart rate < 60/min includes all of the following, except:

Atropine. In pediatric resuscitation, the primary cause of bradycardia and cardiac arrest is usually **hypoxia and respiratory failure**, rather than primary cardiac issues. ### **Why Atropine is the Correct Answer (The "Except")** According to the PALS (Pediatric Advanced Life Support) guidelines, the management of a child with a heart rate **< 60/min** with signs of poor perfusion—despite adequate oxygenation and ventilation—focuses on improving oxygen delivery and cardiac output. **Atropine is no longer recommended as a first-line drug** for symptomatic bradycardia unless the bradycardia is due to increased vagal tone (e.g., during suctioning), primary AV block, or organophosphate poisoning. It does not address the underlying hypoxic cause of pediatric arrest. ### **Analysis of Other Options** * **Chest Compressions:** Indicated in a child if the heart rate remains < 60/min with signs of poor perfusion despite effective ventilation with 100% oxygen. * **Adrenaline (Epinephrine):** The drug of choice for persistent symptomatic bradycardia. It provides alpha-adrenergic vasoconstriction and beta-adrenergic inotropic/chronotropic effects to restore circulation. * **Endotracheal Intubation:** Securing the airway is a priority. Since most pediatric bradycardia is respiratory in origin, ensuring optimal ventilation and oxygenation via an ET tube is a standard resuscitative step. ### **High-Yield Clinical Pearls for NEET-PG** * **Compression-to-Ventilation Ratio:** 15:2 for two-rescuer CPR in children; 30:2 for single-rescuer. * **Adrenaline Dose:** 0.01 mg/kg (0.1 mL/kg of 1:10,000 concentration) IV/IO. * **Atropine Dose:** 0.02 mg/kg (Minimum dose 0.1 mg to avoid paradoxical bradycardia). * **Depth of Compression:** At least 1/3rd the AP diameter of the chest (approx. 4 cm in infants, 5 cm in children).

Q: What is the maintenance intravenous fluid dose for a 7-year-old girl weighing 25 kg?

1600 ml/day. ### Explanation The calculation of maintenance intravenous fluids in pediatrics is based on the **Holliday-Segar Formula**, which estimates caloric expenditure and fluid requirements based on body weight. **The Calculation:** For a child weighing 25 kg, the fluid requirement is calculated using the "100-50-20" rule: 1. **First 10 kg:** 100 ml/kg/day = $10 \times 100 = 1000 \text{ ml}$ 2. **Next 10 kg (11–20 kg):** 50 ml/kg/day = $10 \times 50 = 500 \text{ ml}$ 3. **Remaining weight (>20 kg):** 20 ml/kg/day for each kg above 20 kg. * For this child: $25\text{ kg} - 20\text{ kg} = 5\text{ kg}$ * $5 \times 20 = 100 \text{ ml}$ **Total Maintenance Fluid:** $1000 + 500 + 100 = \mathbf{1600 \text{ ml/day}}$. --- **Analysis of Incorrect Options:** * **Option A (1400 ml/day):** This would be the requirement for a 18 kg child. * **Option B (1500 ml/day):** This is the maintenance for exactly a 20 kg child. * **Option D (1700 ml/day):** This would be the requirement for a 30 kg child. --- **Clinical Pearls for NEET-PG:** * **Hourly Rate Shortcut (4-2-1 Rule):** For a 25 kg child, the hourly rate is $(4 \times 10) + (2 \times 10) + (1 \times 5) = 65 \text{ ml/hr}$. Multiplying $65 \times 24$ hours also yields approximately 1560–1600 ml/day. * **Standard Fluid Choice:** Isotonic solutions (e.g., 0.9% Normal Saline) are now preferred over hypotonic solutions (like 0.18% NS) for maintenance in hospitalized children to prevent **iatrogenic hyponatremia**. * **Exceptions:** Maintenance fluids should be reduced in conditions like SIADH, oliguric renal failure, or congestive heart failure, and increased in cases of fever (12% increase for every 1°C rise) or tachypnea.

Q: Which of the following is NOT true about Asystole?

Defibrillation is performed as early as possible.. In pediatric advanced life support (PALS), cardiac arrest is categorized into **shockable** (Ventricular Fibrillation, Pulseless Ventricular Tachycardia) and **non-shockable** (Asystole, Pulseless Electrical Activity) rhythms. ### **Why Option C is the Correct Answer (The False Statement)** Asystole is a **non-shockable rhythm**. Defibrillation is used to terminate disorganized electrical activity (like VF/pVT) to allow the heart's natural pacemaker to take over. In asystole, there is a total absence of electrical activity; applying an electric shock is not only ineffective but can cause further myocardial damage and parasympathetic surge, delaying effective CPR. ### **Analysis of Other Options** * **Option A:** True. Unlike adults, where primary cardiac events (VF) are common, pediatric arrests are usually secondary to respiratory failure or shock, leading to progressive bradycardia and eventually **asystole**, making it the most common arrest rhythm in children. * **Option B:** True. Per the latest AHA/PALS guidelines, the sequence for all cardiac arrests is **C-A-B** (Circulation, Airway, Breathing) to minimize interruptions in chest compressions. * **Option D:** True. **Epinephrine** is the primary vasopressor used in asystole to increase coronary perfusion pressure. In non-shockable rhythms, it should be administered as soon as possible. ### **Clinical Pearls for NEET-PG** * **Drug of Choice:** Epinephrine (0.01 mg/kg or 0.1 ml/kg of 1:10,000 concentration). * **Reversible Causes:** Always screen for the **6 H’s and 5 T’s** (Hypovolemia, Hypoxia, Hydrogen ion/Acidosis, Hypo/Hyperkalemia, Hypoglycemia, Hypothermia; Toxins, Tamponade, Tension pneumothorax, Thrombosis-coronary/pulmonary). * **Shock Energy:** For shockable rhythms, start at **2 J/kg**, then **4 J/kg**, with a maximum of 10 J/kg.

Question 1

A 5-year-old child is brought to the emergency department after an electrocution incident. The child is apneic and is being ventilated with a bag and mask. There are burns on each hand. What is the next step in management?

Accepted Answer

Check pulses

Answer

Start chest compressions

Answer

Intubate

Answer

Check oxygen saturation

Question 2

What is the recommended endotracheal concentration of adrenaline during CPR in pediatric patients?

Accepted Answer

1:1,000

Answer

1:10 lakhs

Answer

1:1 lakh

Answer

1:10,000

Question 3

What is the daily maintenance fluid requirement for a child weighing 10 kg?

Accepted Answer

1000 ml/day

Answer

800 ml/day

Answer

500 ml/day

Answer

1200 ml/day

Question 4

A 4-year-old child presents with shock and circulatory collapse. Intravenous access is not possible. What is the next best step?

Accepted Answer

Intraosseous cannulation

Answer

Intracardiac infusion

Answer

Thoracotomy

Answer

Cardiopulmonary resuscitation (CPR)

Question 5

A 3-year-old boy with a history of bronchial asthma presents with progressive shortness of breath for 1 day. On examination, the child is cyanotic, gasping, and unresponsive. What is your immediate priority?

Accepted Answer

Administer 100% oxygen by mask

Answer

Intubate

Answer

Ventilate with a bag-valve-mask device

Answer

Administer nebulised salbutamol

Question 6

A 15-month-old girl has a history of poor oral fluid intake, occasional vomiting, rapid breathing, and decreased urine output. Physical examination reveals a pulse of 150/min, BP of 120/80, and a respiratory rate of 60/min. There are bibasilar rales, and the liver is palpable. Which of the following procedures might be helpful in evaluating the oliguria, EXCEPT?

Accepted Answer

Giving a fluid challenge with isotonic saline, 20 ml/kg

Answer

Determining the urine sodium concentration

Answer

Determining the BUN and serum creatinine levels

Answer

Giving a dose of intravenous furosemide

Question 7

Resuscitation of a child with heart rate < 60/min includes all of the following, except:

Accepted Answer

Atropine

Answer

Chest compression

Answer

Adrenaline

Answer

Endotracheal tube intubation

Question 8

What is the maintenance intravenous fluid dose for a 7-year-old girl weighing 25 kg?

Accepted Answer

1600 ml/day

Answer

1400 ml/day

Answer

1500 ml/day

Answer

1700 ml/day

Question 9

Which of the following is NOT true about Asystole?

Accepted Answer

Defibrillation is performed as early as possible.

Answer

It is the most common cause of cardiac arrest in children.

Answer

The sequence of resuscitation is airway, breathing, then circulation (c-a-b).

Answer

Epinephrine is the drug of choice.

Question 10

What is the most common feature of polytrauma in the pediatric age group?

Accepted Answer

Hypovolemic shock

Answer

Hypothermia

Answer

Hypotension

Answer

Hypoxemia

Pediatric Critical Care — MCQs

Pediatric Critical Care — MCQs

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