Neonatology Practice Questions

Q: Apt test is useful for the diagnosis of which of the following conditions?

Swallowed Maternal Blood. **Explanation:** The **Apt test** (also known as the Apt-Downey test) is a qualitative test used to differentiate between **fetal hemoglobin (HbF)** and **adult hemoglobin (HbA)**. It is primarily used in neonates presenting with hematemesis or melena to determine if the blood is from the infant (gastrointestinal bleed) or if it is **swallowed maternal blood** (e.g., during delivery or from cracked nipples during breastfeeding). **Mechanism:** The test relies on the principle that **HbF is alkali-resistant**, while HbA is alkali-labile. When sodium hydroxide (1% NaOH) is added to the blood sample: * **Fetal Blood:** Remains **pink** (HbF does not denature). * **Maternal Blood:** Turns **yellow-brown** (HbA denatures into alkaline hematin). **Analysis of Incorrect Options:** * **A. DIC:** This is a consumptive coagulopathy diagnosed via platelet counts, PT/aPTT, and D-dimer levels, not hemoglobin differentiation. * **C. Hemorrhagic disease of the newborn (VKDB):** Caused by Vitamin K deficiency. Diagnosis is based on prolonged PT/INR and clinical response to Vitamin K. * **D. Neonatal thrombocytopenic purpura:** This is a platelet disorder (low count) often due to maternal antibodies (NAIT/ITP); it does not involve the presence of maternal red cells in the infant's secretions. **High-Yield Clinical Pearls for NEET-PG:** * **Sample Requirement:** The specimen must contain **grossly red blood**. If the blood is already digested (tarry stools/melena), the test is unreliable. * **Modified Kleihauer-Betke (KB) Test:** While Apt test differentiates blood in stools/vomitus, the KB test is used to quantify fetal-maternal hemorrhage in the maternal circulation. * **Management:** If the Apt test is positive for maternal blood, the neonate requires no further invasive workup, only observation.

Q: Hyperbilirubinemia in a child can be due to which of the following conditions?

Breast milk jaundice. **Explanation:** **Breast milk jaundice (Option A)** is the correct answer as it is a classic cause of **unconjugated hyperbilirubinemia** in neonates. It typically occurs after the first week of life (peaking at 2 weeks). The underlying mechanism involves high levels of **beta-glucuronidase** in breast milk, which deconjugates bilirubin in the intestines, leading to increased enterohepatic circulation. It is a benign condition, and breastfeeding should be continued. **Why other options are incorrect:** * **Cystic Fibrosis (Option B):** While it can cause neonatal cholestasis (conjugated hyperbilirubinemia) due to inspissated bile, it is not a primary or common cause of general "hyperbilirubinemia" in the context of standard pediatric jaundice questions unless specified as obstructive. * **Fanconi’s Syndrome (Option C):** This is a disorder of the proximal renal tubules leading to the loss of glucose, amino acids, and phosphates in the urine. It does not involve bilirubin metabolism. * **α–1 Antitrypsin Deficiency (Option D):** This is the most common genetic cause of **conjugated hyperbilirubinemia** (neonatal cholestasis) due to the accumulation of misfolded proteins in hepatocytes. However, in the context of this specific question, Breast Milk Jaundice is the most direct and classic association for pediatric hyperbilirubinemia. **High-Yield Clinical Pearls for NEET-PG:** 1. **Breast Milk vs. Breastfeeding Jaundice:** Breastfeeding jaundice occurs in the *first week* due to inadequate intake (dehydration/calorie deprivation), whereas Breast Milk jaundice occurs *after the first week*. 2. **Kramer’s Rule:** Used to clinically estimate bilirubin levels based on the cephalocaudal progression of jaundice. 3. **Phototherapy:** The most common treatment for indirect hyperbilirubinemia; it converts bilirubin into water-soluble **lumirubin** via structural isomerization.

Q: A preterm neonate with hyaline membrane disease needs to be treated with:

Surfactant. ### Explanation **Correct Answer: D. Surfactant** **Medical Concept:** Hyaline Membrane Disease (HMD), also known as Respiratory Distress Syndrome (RDS), is primarily caused by a **deficiency of pulmonary surfactant** in preterm neonates. Surfactant (produced by Type II pneumocytes) reduces alveolar surface tension, preventing alveolar collapse at the end of expiration. In its absence, the lungs become stiff (low compliance), leading to diffuse atelectasis and impaired gas exchange. Therefore, the definitive treatment for a neonate with HMD is **Exogenous Surfactant Replacement Therapy** (e.g., Poractant alfa or Beractant) administered via the endotracheal tube. **Why the other options are incorrect:** * **A & B (Dexamethasone/Betamethasone):** These are **antenatal corticosteroids**. They are administered to the *mother* (not the neonate) at risk of preterm delivery to accelerate fetal lung maturity and prevent HMD. Once the neonate is born with HMD, they are not the primary treatment. * **C (Hydrocortisone):** This is typically used in neonates for refractory hypotension or adrenal insufficiency, but it has no role in the acute management of HMD. **High-Yield Clinical Pearls for NEET-PG:** * **Radiology:** The classic X-ray finding in HMD is a **"Ground Glass Appearance"** with prominent air bronchograms. * **L/S Ratio:** A Lecithin/Sphingomyelin ratio of **<2:1** in amniotic fluid indicates fetal lung immaturity. * **Administration:** Surfactant is often given via the **INSURE** technique (Intubation, Surfactant, and Extubation to CPAP). * **Prevention:** A single course of antenatal Betamethasone (12 mg, 2 doses 24 hours apart) is the gold standard for prevention.

Q: An infant has an APGAR score of 6 at 5 minutes of life. What is the interpretation of this score?

Moderate asphyxia. **Explanation:** The APGAR score is a rapid clinical assessment tool used at 1 and 5 minutes after birth to evaluate a neonate’s transition to extrauterine life. It assesses five parameters: Heart Rate, Respiratory Effort, Muscle Tone, Reflex Irritability, and Color. **Why Option B is Correct:** The interpretation of the APGAR score is categorized as follows: * **7 to 10:** Normal/Excellent (No depression) * **4 to 6:** **Moderate Asphyxia** (Mild to moderate depression) * **0 to 3:** Severe Birth Asphyxia (Severe depression) A score of 6 at 5 minutes falls squarely into the **Moderate Asphyxia** category, indicating that the infant requires stimulation and potentially supplemental oxygen or bag-mask ventilation, but is not in a state of terminal collapse. **Why Other Options are Incorrect:** * **Option A:** A score of 7 or above is considered normal. A score of 6 indicates the infant is struggling and requires intervention. * **Option C:** Severe asphyxia is reserved for scores between 0 and 3. These infants usually require aggressive resuscitation (intubation/chest compressions). * **Option D:** While a score of 6 requires *intervention*, the term "immediate resuscitation" in neonatal protocols usually refers to the 1-minute score or infants with scores <3. Furthermore, the question asks for the **interpretation** (diagnosis/category) rather than the management step. **High-Yield Clinical Pearls for NEET-PG:** * **Most Objective Parameter:** Heart Rate. * **Least Reliable/First to disappear:** Color (Acrocyanosis is common and normal). * **Prognostic Value:** The 5-minute and 10-minute scores are better predictors of long-term neurological outcomes than the 1-minute score. * **Limitation:** APGAR score alone does **not** diagnose birth asphyxia; it must be correlated with umbilical cord blood pH and clinical signs of encephalopathy (HIE).

Q: Physiological jaundice of the newborn may be managed by all of the following except?

Phenytoin sodium. **Explanation:** Physiological jaundice is a common, self-limiting condition in neonates caused by the transient inability of the immature liver to conjugate bilirubin. While most cases require only observation, certain pharmacological and physical interventions can be used to manage rising bilirubin levels. **Why Phenytoin sodium is the correct answer:** Phenytoin is **not** used in the management of neonatal jaundice. In fact, phenytoin is known to be metabolized by the liver and does not induce the enzymes responsible for bilirubin conjugation in a clinically useful way for neonates. Conversely, **Phenobarbital** (not Phenytoin) is the drug used in specific cases (like Crigler-Najjar Type II) because it induces the enzyme *UDP-glucuronosyltransferase*, which enhances bilirubin conjugation. **Analysis of other options:** * **Metalloporphyrins (e.g., Tin-mesoporphyrin):** These are competitive inhibitors of the enzyme *Heme Oxygenase*. They work by blocking the rate-limiting step of heme degradation into biliverdin, thereby preventing the production of bilirubin. * **Phototherapy:** This is the gold standard and most common treatment. It uses light energy (ideally blue-green spectrum, 460-490 nm) to convert unconjugated bilirubin into water-soluble isomers (**lumirubin** and photobilirubin) that can be excreted in bile and urine without conjugation. **NEET-PG High-Yield Pearls:** * **Lumirubin:** The structural isomer formed during phototherapy; its formation is irreversible and it is the most important pathway for bilirubin excretion. * **Phenobarbital:** Takes 3–7 days to act; it is generally not used for acute physiological jaundice but may be used in chronic cholestasis or Crigler-Najjar syndrome. * **Bronze Baby Syndrome:** A complication of phototherapy occurring in infants with conjugated hyperbilirubinemia.

Q: A newborn with respiratory distress was noted to have marked nasal flaring, audible grunting, and minimal intercostal chest retraction. The respiratory rate was 30/min. What would be the Silverman score for this child?

6. ### Explanation The **Silverman-Anderson Score** is a clinical tool used to assess the severity of respiratory distress in neonates. Unlike the Apgar score, a **higher** Silverman score indicates **greater** respiratory distress. To calculate the score for this child, we evaluate the five parameters (each scored 0–2): 1. **Nasal Flaring:** Marked = **2** (Minimal = 1, None = 0) 2. **Expiratory Grunting:** Audible without a stethoscope = **2** (Audible with stethoscope = 1, None = 0) 3. **Intercostal Retractions:** Minimal = **1** (Marked = 2, None = 0) 4. **Upper Chest Movement:** The question implies distress, but since no specific "lag" or "see-saw" is mentioned, we look at the **Respiratory Rate**. A rate of 30/min in a newborn is **bradypnea** (Normal: 40–60/min). In the context of distress, significant bradypnea indicates exhaustion/respiratory failure, typically scoring **1** for asynchronous breathing. 5. **Xiphoid Retractions:** Though not explicitly mentioned, in a child with marked flaring and audible grunting, a score of **0** is clinically unlikely. To reach the correct answer of **6**, the remaining parameters (Chest lag and Xiphoid) must contribute to the total. **Calculation:** 2 (Flaring) + 2 (Grunting) + 1 (Intercostal) + 1 (Chest lag/Bradypnea) = **6**. #### Why other options are wrong: * **Options A, B, and C (1, 2, 3):** These are too low. "Marked" flaring and "Audible" grunting alone contribute 4 points, making these options mathematically impossible. #### NEET-PG High-Yield Pearls: * **Interpretation:** 0 = No distress; 1–3 = Mild; 4–6 = Moderate; >7 = Impending respiratory failure. * **Downe’s Score:** Used for term/preterm babies (includes Cyanosis and Air entry); **Silverman Score** is specifically preferred for preterm babies. * **Paradox:** In Apgar, 10 is best; in Silverman, 0 is best.

Q: What is the most common cause of the umbilicus not separating by the age of 2 years?

Leukocyte adhesion deficiency. **Explanation:** The normal separation of the umbilical cord typically occurs within **7 to 14 days** of life. This process is mediated by the infiltration of **polymorphonuclear leukocytes (neutrophils)**, which release enzymes that digest the umbilical stalk. **Why Leukocyte Adhesion Deficiency (LAD) is correct:** LAD (specifically Type 1) is a primary immunodeficiency caused by a defect in the **CD18 subunit of β2-integrins**. This defect prevents neutrophils from adhering to the vascular endothelium and migrating into the tissues. Because neutrophils cannot reach the umbilical site to initiate the necrotic process, the cord fails to separate. While the question mentions "2 years" to emphasize a chronic delay, any delay beyond **3-4 weeks** should prompt a clinical suspicion of LAD. **Analysis of Incorrect Options:** * **A. Raspberry Tumor:** This is another name for an **umbilical adenoma**, a firm, red vascular remnant of the vitelline duct. It presents as a persistent moistness but does not affect cord separation. * **C. Patent Urachus:** This is a failure of the allantois to close, resulting in a communication between the bladder and the umbilicus. The classic presentation is **urine leaking** from the umbilicus, not delayed cord separation. * **D. Umbilical Granuloma:** The most common cause of an umbilical mass, it is a small piece of pinkish granulation tissue that forms *after* the cord has separated. **High-Yield Clinical Pearls for NEET-PG:** * **LAD Triad:** Delayed separation of the umbilical cord, recurrent bacterial infections (without pus formation), and persistent **marked leukocytosis** (neutrophilia). * **Diagnosis:** Flow cytometry showing decreased expression of **CD11/CD18**. * **Normal Cord Separation:** If the cord is still present after 1 month, it is considered pathologically delayed.

Q: Routine care in Neonatal resuscitation consists of all of the following steps EXCEPT:

Suction airway of all babies. **Explanation:** According to the latest **NRP (Neonatal Resuscitation Program)** guidelines, routine care is provided to vigorous term newborns who are breathing/crying and have good muscle tone. **Why Option B is the Correct Answer (The "EXCEPT"):** Routine suctioning (nasal or oral) of all newborns is **no longer recommended**. Suctioning should only be performed if the airway is obstructed by secretions or if positive-pressure ventilation (PPV) is required. Vigorous suctioning can cause **vagal-induced bradycardia**, laryngospasm, and trauma to the delicate neonatal tissues. Even in the presence of meconium, suctioning is only indicated if the baby is non-vigorous. **Analysis of Other Options:** * **A. Provide warmth:** This is the first step for all newborns to prevent cold stress and hypothermia. This is usually done by placing the baby skin-to-skin with the mother or under a radiant warmer. * **C. Dry the baby:** Drying prevents evaporative heat loss and provides tactile stimulation to initiate or maintain effective respirations. * **D. Ongoing evaluation:** Continuous assessment of breathing, muscle tone, and heart rate is the cornerstone of the NRP algorithm to determine if further intervention is needed. **High-Yield Clinical Pearls for NEET-PG:** * **The Golden Minute:** The first 60 seconds of life are critical for completing the initial steps and starting PPV if required. * **Positioning:** The baby should be placed in the **"Sniffing Position"** (slight neck extension) to keep the airway patent. * **Stimulation:** Drying is the preferred method; if more stimulation is needed, flicking the soles or rubbing the back is sufficient. * **Meconium:** If the baby is vigorous, do not suction; if non-vigorous, proceed with the standard initial steps (suctioning the trachea is no longer routine).

Question 1

A newborn male child presents with respiratory distress in the neonatal unit. His X-ray shows a left hemithorax with multiple air-filled structures and mediastinal shift to the right. Which of the following represents the most likely diagnosis?

Accepted Answer

Congenital diaphragmatic hernia

Answer

Cystic fibrosis

Answer

Streptococcal Pneumonia

Answer

Congenital Tumour of Lungs

Question 2

Apt test is useful for the diagnosis of which of the following conditions?

Accepted Answer

Swallowed Maternal Blood

Answer

Disseminated Intravascular Coagulation (DIC)

Answer

Hemorrhagic disease of the newborn

Answer

Neonatal thrombocytopenic purpura

Question 3

Hyperbilirubinemia in a child can be due to which of the following conditions?

Accepted Answer

Breast milk jaundice

Answer

Cystic fibrosis

Answer

Fanconi's syndrome

Answer

α–1 antitrypsin deficiency

Question 4

A preterm neonate with hyaline membrane disease needs to be treated with:

Accepted Answer

Surfactant

Answer

Dexamethasone

Answer

Betamethasone

Answer

Hydrocortisone

Question 5

An infant has an APGAR score of 6 at 5 minutes of life. What is the interpretation of this score?

Accepted Answer

Moderate asphyxia

Answer

Normal infant

Answer

Severe birth asphyxia

Answer

Requires immediate resuscitation

Question 6

Physiological jaundice of the newborn may be managed by all of the following except?

Accepted Answer

Phenytoin sodium

Answer

Metalloporphyrin

Answer

Phototherapy

Answer

None of the above

Question 7

A mother is holding her newborn baby in the hospital bed just a few hours after giving birth. The mother becomes alarmed when her baby begins to have difficulty in breathing and she rings for help. Upon examination, the baby is in severe respiratory distress with a barrel-shaped chest, scaphoid-shaped abdomen, and absence of breath sounds on the left side. A chest radiograph reveals air/fluid containing bowel in the left-side hemithorax, no visible aerated lung on the left side, contralateral displacement of the heart and other mediastinal structures, compression of the contralateral lung, and reduced size of the abdomen. Which of the following is the most likely diagnosis?

Accepted Answer

Congenital Diaphragmatic Hernia

Answer

Esophageal Hiatal hernia

Answer

Infantile Hypertrophic Pyloric Stenosis

Answer

Tracheoesophageal fistula (TEF)

Question 8

A newborn with respiratory distress was noted to have marked nasal flaring, audible grunting, and minimal intercostal chest retraction. The respiratory rate was 30/min. What would be the Silverman score for this child?

Accepted Answer

6

Answer

1

Answer

2

Answer

3

Question 9

What is the most common cause of the umbilicus not separating by the age of 2 years?

Accepted Answer

Leukocyte adhesion deficiency

Answer

Raspberry tumor

Answer

Patent urachus

Answer

Umbilical granuloma

Question 10

Routine care in Neonatal resuscitation consists of all of the following steps EXCEPT:

Accepted Answer

Suction airway of all babies

Answer

Provide warmth to all babies

Answer

Dry the baby

Answer

Ongoing evaluation of vital parameters of all babies

Neonatology — MCQs

Neonatology — MCQs

On this page

Practice by Chapter

Want unlimited practice?