Neonatology Practice Questions

Q: Which of the following is NOT a criterion for hypoxic-ischemic encephalopathy?

Normal MRI imaging after 24 hours of life. To diagnose **Hypoxic-Ischemic Encephalopathy (HIE)** in a neonate, specific criteria established by the American Academy of Pediatrics (AAP) and ACOG must be met. These criteria identify an acute intrapartum hypoxic event sufficient to cause neurological damage. ### **Explanation of the Correct Option** **C. Normal MRI imaging after 24 hours of life:** This is **NOT** a criterion for HIE. In fact, HIE is characterized by **abnormal** neuroimaging. While an MRI may be normal in the first 24 hours (due to the evolution of injury), characteristic patterns of injury (e.g., involvement of the basal ganglia, thalamus, or watershed areas) typically appear on Diffusion-Weighted Imaging (DWI) between 24–72 hours. A persistently normal MRI would suggest an alternative diagnosis. ### **Analysis of Incorrect Options** * **A. Apgar score < 5 at 5 and 10 minutes:** Low Apgar scores are a core requirement. A score <5 at 5 and 10 minutes indicates significant postnatal depression and correlates with an increased risk of neurological morbidity. * **B. Umbilical arterial acidemia:** A hallmark of HIE is profound metabolic or mixed acidemia (pH < 7.00 or base deficit ≥ 12 mmol/L) in an umbilical artery blood gas sample. * **C. Multisystem involvement:** HIE is a systemic insult. Evidence of injury to other organs (e.g., acute kidney injury, hepatic dysfunction, myocardial irritability, or hematologic abnormalities) supports the diagnosis of a significant hypoxic event. ### **NEET-PG High-Yield Pearls** * **Sarnat Staging:** Used to grade the severity of HIE (Stage I: Hyperalert; Stage II: Seizures/Lethargy; Stage III: Coma/Flaccidity). * **Therapeutic Hypothermia:** The standard of care for moderate-to-severe HIE; it must be initiated within **6 hours** of birth. * **Most Sensitive Imaging:** MRI is the gold standard, with **Diffusion-Weighted Imaging (DWI)** being the most sensitive sequence in the first week of life.

Q: Absent Moro's reflex is seen in which of the following conditions?

Stage III hypoxic Ischaemic Encephalopathy (HIE). **Explanation:** The **Moro reflex** is a primitive reflex mediated by the brainstem. It appears at birth and typically disappears by 3–6 months of age. An **absent** Moro reflex indicates a severe, generalized depression of the Central Nervous System (CNS). **Why Stage III HIE is correct:** Hypoxic-Ischemic Encephalopathy (HIE) is graded using the **Sarnat and Sarnat staging**. * **Stage I (Mild):** Hyper-alertness, normal or brisk reflexes. * **Stage II (Moderate):** Lethargy, suppressed/weak Moro reflex. * **Stage III (Severe):** Coma, flaccidity, and **complete absence** of primitive reflexes (Moro, sucking, etc.). In this stage, the brainstem function is severely compromised, leading to the total absence of the reflex. **Analysis of Incorrect Options:** * **Neonatal Hypoglycemia:** While severe hypoglycemia can cause lethargy or seizures, it typically presents with a **jittery** or exaggerated Moro reflex rather than a complete absence. * **Erb’s Palsy & Fracture Clavicle:** These conditions cause an **asymmetrical** Moro reflex. The reflex is present on the normal side but absent or restricted on the affected side due to nerve injury (C5-C6) or pain/mechanical restriction. **High-Yield Clinical Pearls for NEET-PG:** * **Asymmetrical Moro:** Think of Brachial plexus injury (Erb’s), fractured clavicle, or fractured humerus. * **Exaggerated Moro:** Seen in Neonatal Abstinence Syndrome (drug withdrawal), Hypocalcemia, and Stage I HIE. * **Persistence beyond 6 months:** Suggests spastic cerebral palsy. * **Components:** The reflex consists of three phases: sudden extension and abduction of arms, followed by flexion and adduction (embrace), and usually ends with crying.

Q: Which of the following is NOT a cause of neonatal seizures?

Hypokalemia. **Explanation:** In neonatology, metabolic disturbances are among the most common causes of seizures. The correct answer is **Hypokalemia (B)** because, while it significantly affects cardiac conduction and muscle strength (causing arrhythmias or paralytic ileus), it is **not** a recognized cause of neonatal seizures. Seizures are primarily triggered by disturbances that alter neuronal membrane stability or energy metabolism in the brain. * **Hypoglycemia (D):** This is a critical and common cause. Glucose is the primary fuel for the neonatal brain; a deficiency leads to ATP depletion, failure of the sodium-potassium pump, and neuronal depolarization. * **Hypomagnesemia (C):** Low magnesium levels often coexist with hypocalcemia. Magnesium is a cofactor for the Na-K-ATPase pump; its deficiency increases neuromuscular excitability, leading to tetany and seizures. * **Pyridoxine (Vitamin B6) Deficiency (A):** This is a rare but classic "must-know" cause for NEET-PG. Pyridoxine is a cofactor for GAD (Glutamic Acid Decarboxylase), which converts Glutamate into GABA (the brain's primary inhibitory neurotransmitter). A deficiency leads to a lack of GABA, causing intractable seizures that only respond to IV Pyridoxine. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of neonatal seizures:** Hypoxic-Ischemic Encephalopathy (HIE) (usually occurs within the first 24 hours). * **Most common metabolic cause:** Hypocalcemia (Early onset: 3 days). * **Drug of Choice:** Phenobarbital remains the first-line anticonvulsant for neonatal seizures. * **Key Distinction:** Hypo**natremia** and Hyper**natremia** cause seizures, but potassium imbalances do not.

Q: A newborn with recurrent vomiting and cyanosis after each feed is likely suffering from which condition?

Tracheoesophageal fistula. **Explanation:** The clinical presentation of **recurrent vomiting and cyanosis immediately following feeds** in a newborn is a classic triad for **Tracheoesophageal Fistula (TEF)**, often associated with Esophageal Atresia (EA). 1. **Why Option A is correct:** In the most common type of TEF (Type C: EA with distal fistula), the blind esophageal pouch fills quickly during feeding, leading to immediate regurgitation/vomiting. The **cyanosis** occurs due to aspiration of milk into the lungs or laryngeal spasm (the "3 Cs": Coughing, Choking, and Cyanosis). Additionally, air enters the stomach through the fistula, causing abdominal distension. 2. **Why other options are incorrect:** * **Tetralogy of Fallot (B):** While it causes cyanosis, it is typically associated with "Tet spells" during crying or exertion, not specifically triggered by the act of swallowing or vomiting. * **Congenital Hypertrophic Pyloric Stenosis (C):** This presents with non-bilious, projectile vomiting, but usually appears at **3–6 weeks of age**, not in the immediate neonatal period, and does not typically cause cyanosis. * **ARDS (D):** Acute Respiratory Distress Syndrome (or Neonatal RDS) presents with grunting and tachypnea due to surfactant deficiency, primarily in preterm infants; it is not episodic or feed-induced. **NEET-PG High-Yield Pearls:** * **Most common type:** Type C (85%) – Proximal Esophageal Atresia with Distal TEF. * **Initial Sign:** Excessive salivation/drooling and inability to pass a nasogastric tube (coils in the pouch). * **VACTERL Association:** Always screen for Vertebral, Anal, Cardiac, TEF, Renal, and Limb anomalies. * **X-ray finding:** A "coiled tube" in the neck and air in the stomach (if a distal fistula exists).

Q: Regarding Cephalohematoma, all the following are true EXCEPT?

It may extend across the midline and cross suture lines.. ### Explanation **Concept Overview:** Cephalohematoma is a collection of blood between the skull bone and its overlying periosteum. The key to answering this question lies in the anatomical boundaries of the periosteum. **1. Why Option B is the Correct Answer (The "Except" statement):** In a cephalohematoma, the hemorrhage is **subperiosteal**. Because the periosteum is firmly attached to the edges of the individual cranial bones at the **sutures**, the bleeding is strictly confined to the surface of that specific bone. Therefore, a cephalohematoma **never crosses suture lines**. This distinguishes it clinically from *Caput Succedaneum* (which is subcutaneous edema) and *Subgaleal Hemorrhage* (which is between the periosteum and the aponeurosis). **2. Analysis of Other Options:** * **Option A:** True. By definition, it is a subperiosteal bleed, usually involving the parietal or occipital bones. * **Option C:** True. It is a common birth injury occurring in approximately 1–2% of live births, often associated with vacuum or forceps-assisted deliveries. * **Option D:** True. While most cases are benign, an underlying linear skull fracture is present in about 10–25% of cases. **Clinical Pearls for NEET-PG:** * **Timing:** Unlike Caput (present at birth), cephalohematoma often appears **hours to days after birth** as the bleeding is slow. * **Resolution:** It takes weeks to months to resolve and may undergo **peripheral calcification**, giving it a "hard" feel. * **Complications:** Watch for **unconjugated hyperbilirubinemia** (as the blood breaks down) and anemia. * **Management:** Observation only. **Incision and drainage are contraindicated** due to the high risk of introducing infection (osteomyelitis).

Q: All of the following conditions usually do not require any treatment in a neonate EXCEPT?

Neonatal hypothermia. **Explanation:** In neonatology, distinguishing between physiological phenomena and pathological conditions is crucial for the NEET-PG exam. **Why Neonatal Hypothermia is the Correct Answer:** Neonatal hypothermia (axillary temperature <36.5°C) is a **medical emergency** that requires immediate intervention. Unlike the other options, it is not a benign physiological state. Neonates are highly susceptible to heat loss due to a large surface-area-to-volume ratio and limited subcutaneous fat. If left untreated, hypothermia leads to metabolic acidosis, hypoglycemia, respiratory distress, and increased mortality (Cold Stress). Management includes skin-to-skin contact (Kangaroo Mother Care), radiant warmers, and addressing the underlying cause. **Analysis of Incorrect Options:** * **Milia:** These are small, pearly-white keratin-filled cysts commonly found on the nose and cheeks. They are transient and resolve spontaneously within a few weeks without treatment. * **Erythema Toxicum Neonatorum (ETN):** A common, benign rash appearing in the first 2-3 days of life, characterized by erythematous macules with central papules or pustules. It contains **eosinophils** and requires no treatment as it fades within a week. * **Vaginal Bleeding (Pseudomenstruation):** Occurs in female neonates due to the sudden withdrawal of maternal estrogens. It is a self-limiting physiological process and requires only parental reassurance. **Clinical Pearls for NEET-PG:** * **Neutral Thermal Environment (NTE):** The environmental temperature range where the baby maintains normal body temperature with minimum metabolic rate and oxygen consumption. * **Brown Adipose Tissue:** The primary source of non-shivering thermogenesis in neonates. * **ETN vs. Pustular Melanosis:** ETN contains eosinophils; Transient Neonatal Pustular Melanosis (TNPM) contains neutrophils and is present at birth.

Q: Which of the following is used to monitor respiration in a neonate who is not intubated?

Impedance pneumography. ### Explanation **1. Why Impedance Pneumography is Correct:** Impedance pneumography is the standard technology used in bedside neonatal monitors to track respiration in non-intubated infants. It works by passing a high-frequency, low-amplitude electrical current between two ECG electrodes placed on the chest. As the neonate breathes, the volume of air in the lungs changes, altering the **transthoracic electrical impedance**. The monitor detects these cyclical changes in resistance and converts them into a respiratory rate and waveform. **2. Analysis of Incorrect Options:** * **Capnography & Infrared End-Tidal CO2 (Options A & D):** These methods measure the concentration of CO2 in exhaled air. While highly accurate, they typically require an interface with an endotracheal tube (intubated patients) or a specialized nasal cannula. In non-intubated neonates, "blow-by" oxygen or small tidal volumes make these methods technically difficult and less reliable for routine continuous monitoring compared to impedance. * **Chest Movements (Option C):** Visual observation of chest wall excursions is a clinical assessment tool, not a continuous automated monitoring technology. It is prone to human error and cannot provide an automated alarm system for apnea. **3. Clinical Pearls for NEET-PG:** * **Limitation of Impedance Pneumography:** It cannot distinguish between **obstructive apnea** and normal breathing. In obstructive apnea, the chest wall still moves (changing impedance), so the monitor may falsely show a normal respiratory rate despite the absence of airflow. * **Gold Standard for Apnea:** Polysomnography (which includes thermistors to detect airflow) is the gold standard for diagnosing types of apnea. * **Electrode Placement:** For optimal impedance monitoring in neonates, electrodes should be placed in the mid-axillary line at the level of the nipples.

Question 1

Which of the following is NOT a criterion for hypoxic-ischemic encephalopathy?

Accepted Answer

Normal MRI imaging after 24 hours of life

Answer

Apgar score < 5 at 5 and 10 minutes

Answer

Umbilical arterial acidemia

Answer

Multisystem involvement

Question 2

Absent Moro's reflex is seen in which of the following conditions?

Accepted Answer

Stage III hypoxic Ischaemic Encephalopathy (HIE)

Answer

Neonatal hypoglycemia

Answer

Erb's Palsy

Answer

Fracture clavicle

Question 3

Which of the following is NOT a cause of neonatal seizures?

Accepted Answer

Hypokalemia

Answer

Pyridoxine deficiency

Answer

Hypomagnesemia

Answer

Hypoglycemia

Question 4

Which of the following are advantages of delayed cord clamping?

Accepted Answer

Reduced risk of anemia

Answer

Reduced risk of hypothermia

Answer

Reduced risk of hypoglycemia

Answer

Reduced risk of hypotension

Question 5

A newborn with recurrent vomiting and cyanosis after each feed is likely suffering from which condition?

Accepted Answer

Tracheoesophageal fistula

Answer

Tetralogy of Fallot

Answer

Congenital hypertrophic pyloric stenosis

Answer

ARDS

Question 6

Regarding Cephalohematoma, all the following are true EXCEPT?

Accepted Answer

It may extend across the midline and cross suture lines.

Answer

It is a subperiosteal hemorrhage.

Answer

It occurs in 1-2% of live births.

Answer

An underlying skull fracture may be associated in 10-25% of cases.

Question 7

All of the following conditions usually do not require any treatment in a neonate EXCEPT?

Accepted Answer

Neonatal hypothermia

Answer

Milia

Answer

Erythema toxicum neonatorum

Answer

Vaginal bleeding

Question 8

A two-day-old baby presented with severe respiratory distress. On examination, a scaphoid abdomen and decreased breath sounds on the left side were observed. The baby was managed by prompt endotracheal intubation. After ET tube placement, the maximal cardiac impulse shifted further to the right side. What should be the next step in management?

Accepted Answer

Remove the tube and reattempt intubation

Answer

Confirm the position of the endotracheal tube by chest X-ray

Answer

Nasogastric tube insertion and decompress the bowel

Answer

Chest X-ray to confirm diagnosis

Question 9

Which of the following is used to monitor respiration in a neonate who is not intubated?

Accepted Answer

Impedance pneumography

Answer

Capnography

Answer

Chest movements

Answer

Infrared End Tidal CO2

Question 10

Which of the following scenarios poses the least risk of neonatal varicella pneumonia in an infant born to a mother with varicella infection?

Accepted Answer

Mother develops rash 10 days before delivery.

Answer

Mother develops rash 2 days before delivery.

Answer

Mother develops rash during the postnatal hospital stay.

Answer

Mother develops rash just before delivery and was treated with acyclovir.

Neonatology — MCQs

Neonatology — MCQs

On this page

Practice by Chapter

Want unlimited practice?