Neonatology — MCQs

Neonatology Indian Medical PG Practice Questions and MCQs

Question 841: In the NICU, some infants receiving Kangaroo Mother Care (KMC) do not gain weight adequately. What is the best recommendation to improve their weight gain?

A. Focus KMC on stable infants
B. Add supplemental feeding (Correct Answer)
C. Increase KMC duration
D. Limit KMC to term infants

Explanation: ***Add supplemental feeding*** - For infants receiving KMC who are not gaining weight adequately, providing **supplemental feeding**, such as expressed breast milk, formula, or fortified breast milk, is crucial to meet their increased caloric needs. - **Improved nutrition** directly addresses the underlying cause of poor weight gain, providing the necessary energy and nutrients for growth. *Focus KMC on stable infants* - While KMC is beneficial for stable infants, limiting its application does not address the nutritional deficit of infants who are already receiving KMC and failing to gain weight. - KMC is widely recommended for both stable and some unstable preterm infants to improve their **physiological stability** and **parent-infant bonding**, not primarily as a weight-gain strategy by itself. *Increase KMC duration* - Increasing the duration of KMC alone does not directly address the caloric deficit responsible for inadequate weight gain if the infant's nutritional intake is insufficient. - While prolonged skin-to-skin contact has numerous benefits, it's not a substitute for adequate **caloric intake** when weight gain is a concern. *Limit KMC to term infants* - KMC is especially beneficial for **preterm and low-birth-weight infants** due to its positive effects on temperature regulation, breastfeeding, and growth. - Limiting KMC to term infants would deny the significant benefits to the vulnerable population who most need it.

Question 842: What is the most common cause of respiratory distress in preterm infants?

A. Congenital diaphragmatic hernia
B. Transient tachypnea of the newborn
C. Meconium aspiration syndrome
D. Respiratory distress syndrome (Correct Answer)

Explanation: ***Respiratory distress syndrome*** - This is the most common cause of respiratory distress in **preterm infants** due to **surfactant deficiency**, leading to atelectasis. - The risk is inversely proportional to gestational age, meaning the more premature the infant, the higher the risk. *Congenital diaphragmatic hernia* - This is a rare, severe condition where abdominal organs protrude into the chest cavity, compressing the lungs. - While it causes significant respiratory distress, it is a structural anomaly and not the most common cause overall in preterm infants. *Transient tachypnea of the newborn* - This condition is caused by delayed clearance of **fetal lung fluid** and is more common in **term or late preterm infants** delivered by C-section. - It typically resolves within 24-48 hours and is generally less severe than RDS. *Meconium aspiration syndrome* - This occurs when a fetus inhales meconium (fetal stool) mixed with amniotic fluid, typically in **post-term or stressed term infants**. - It is uncommon in preterm infants because they rarely pass meconium in utero due to immature gastrointestinal motility.

Question 843: Kangaroo Mother Care is primarily used for what purpose?

A. Breastfeeding
B. Thermal regulation (Correct Answer)
C. Weight monitoring
D. Vaccination

Explanation: ***Thermal regulation*** - **Kangaroo Mother Care (KMC)** primarily focuses on providing **skin-to-skin contact** between the mother (or another caregiver) and the baby. - This contact helps to **maintain the infant's body temperature**, especially crucial for **premature** and **low birth weight** babies, preventing **hypothermia**. *Breastfeeding* - While KMC can facilitate and promote **successful breastfeeding** due to the close contact, it is not its primary and sole purpose. - The direct skin-to-skin contact makes it easier for the baby to root and latch, but the core benefit extends beyond feeding. *Weight monitoring* - **Weight monitoring** is an important aspect of care for newborns, particularly those with low birth weight, but it is not the main function of KMC itself. - Although babies often gain weight effectively with KMC, weight monitoring is a separate healthcare intervention. *Vaccination* - **Vaccination** is a preventative health measure administered to protect infants from infectious diseases and is completely unrelated to KMC. - KMC provides fundamental care and support, whereas vaccination is a medical procedure.

Question 844: A newborn with persistent jaundice and clay-colored stools who is found to have conjugated hyperbilirubinemia is most likely diagnosed with what condition?

A. Physiological Jaundice
B. Breast Milk Jaundice
C. Biliary Atresia (Correct Answer)
D. Hemolytic Disease of the Newborn

Explanation: ***Biliary Atresia*** - **Conjugated hyperbilirubinemia** in a newborn with **persistent jaundice** and **clay-colored stools** is the classic presentation of biliary atresia. - The absence of bile flow into the intestine due to blocked bile ducts causes the stools to lose their normal color and bilirubin to accumulate in the blood. *Physiological Jaundice* - This is a **common, transient** condition in newborns, characterized by **unconjugated hyperbilirubinemia**. - It resolves spontaneously and typically presents with **normal stool color** as bile flow is unimpaired. *Breast Milk Jaundice* - This condition is also characterized by **unconjugated hyperbilirubinemia** and is generally benign. - While it can persist, it does not typically cause **clay-colored stools** or significant conjugated hyperbilirubinemia. *Hemolytic Disease of the Newborn* - This condition typically presents with **unconjugated hyperbilirubinemia** due to increased red blood cell breakdown. - Stool color would generally be normal, and there would be no direct obstruction of bile flow.

Question 845: A newborn presents with a bulging mass in the lumbar region. Which congenital condition is most likely?

A. Spina bifida (Correct Answer)
B. Hydrocephalus
C. Encephalocele
D. Sacrococcygeal teratoma

Explanation: ***Spina bifida*** - A **bulging mass in the lumbar region** of a newborn is a classic presentation of **spina bifida**, specifically a **myelomeningocele**, where the spinal cord and meninges protrude through an opening in the vertebrae. - This congenital condition results from incomplete closure of the **neural tube** during fetal development. - Most commonly occurs in the **lumbosacral region** and is covered by a thin membrane. *Hydrocephalus* - While hydrocephalus can occur concurrently with spina bifida (in up to 80% of cases), it is characterized by **excess cerebrospinal fluid** in the brain, leading to an enlarged head, not a bulging mass in the lumbar region. - It would typically present with signs of **increased intracranial pressure**, such as a bulging fontanelle or rapid head growth. *Sacrococcygeal teratoma* - A **congenital tumor** arising from pluripotent cells at the coccyx, presenting as a mass in the sacrococcygeal region. - Unlike myelomeningocele, it is typically a **solid or cystic mass** that arises from the coccyx rather than a defect in the vertebral column with neural tissue protrusion. - It is the most common tumor in neonates but less common than neural tube defects. *Encephalocele* - An encephalocele involves the **protrusion of brain tissue and meninges through a defect in the skull**, typically in the occipital or frontal regions, not the lumbar spine. - It presents as a sac-like protrusion on the head and is another form of neural tube defect affecting the cranial region.

Question 846: A preterm neonate in the NICU develops respiratory distress syndrome. What is the most likely cause of this condition?

A. Meconium aspiration
B. Congenital diaphragmatic hernia
C. Surfactant deficiency (Correct Answer)
D. Pulmonary hypoplasia

Explanation: ***Surfactant deficiency*** - **Respiratory distress syndrome (RDS)** in preterm neonates is primarily caused by **insufficient production of surfactant**. - **Surfactant** reduces alveolar surface tension, preventing atelectasis and ensuring adequate gas exchange. *Meconium aspiration* - This typically occurs in **term or post-term neonates** who experience fetal distress, leading to aspiration of meconium-stained amniotic fluid. - While it causes respiratory distress, it is uncommon in **preterm infants** as meconium passage is rare before term. *Congenital diaphragmatic hernia* - This is a **structural defect** where abdominal contents herniate into the chest, impairing lung development. - It would be evident on **prenatal imaging** or immediately after birth with severe respiratory distress and scaphoid abdomen. *Pulmonary hypoplasia* - This refers to **incomplete development of the lungs**, often associated with conditions like **oligohydramnios** or congenital diaphragmatic hernia. - While it causes respiratory distress, surfactant deficiency is a more direct and common cause of general RDS in preterm infants.

Question 847: A newborn is noted to have micrognathia, glossoptosis, and a cleft soft palate. Which syndrome is this presentation most consistent with?

A. Pierre Robin sequence (Correct Answer)
B. Down syndrome
C. Turner syndrome
D. Marfan syndrome

Explanation: ***Pierre Robin sequence*** - This is a classic **sequence** (not a syndrome) characterized by the triad of **micrognathia**, **glossoptosis** (posterior displacement of the tongue), and a **cleft soft palate**. - The small jaw (micrognathia) causes the tongue to fall back, which in turn prevents the palate from closing, leading to a cleft. - This represents a cascade of developmental events stemming from the primary anomaly of mandibular hypoplasia. *Down syndrome* - Characterized by **trisomy 21**, presenting with distinct facial features such as a flattened nasal bridge, upward-slanting eyes, and a single palmar crease. - While a **cleft palate** can occur, the combination with **micrognathia** and **glossoptosis** is not typically the primary diagnostic triad for Down syndrome. *Turner syndrome* - This is a chromosomal disorder (45, X) affecting females, characterized by features like **short stature**, **webbed neck**, and **ovarian dysgenesis**. - It does not primarily involve the oral-facial triad of micrognathia, glossoptosis, and cleft palate. *Marfan syndrome* - An inherited disorder of connective tissue, primarily affecting the skeletal, ocular, and cardiovascular systems. - Key features include **tall stature**, **long limbs and fingers (arachnodactyly)**, **pectus excavatum**, and **aortic root dilation**. It does not typically present with the specific oral malformations described.

Question 848: A newborn presents with microcephaly, jaundice, and hepatosplenomegaly. The mother experienced a flu-like illness during pregnancy. What is the most likely diagnosis?

A. Congenital cytomegalovirus infection (Correct Answer)
B. Congenital rubella syndrome
C. Congenital syphilis
D. Neonatal sepsis

Explanation: ***Congenital cytomegalovirus infection*** - **Microcephaly**, **jaundice**, and **hepatosplenomegaly** are classic signs of congenital CMV infection due to widespread organ damage. - The mother's flu-like illness during pregnancy is a common symptom of **primary CMV infection**, which is often asymptomatic or mild in adults. *Congenital rubella syndrome* - While it can cause **microcephaly** and **hepatosplenomegaly**, **jaundice** is less prominent, and the classic triad often includes **cataracts**, **cardiac defects** (e.g., patent ductus arteriosus), and **sensorineural hearing loss**. - The maternal illness would typically be characterized by a **rash** rather than just flu-like symptoms. *Congenital syphilis* - Can cause **hepatosplenomegaly** and **jaundice**, but **microcephaly** is not a typical feature. - Characteristic findings usually include **snuffles**, **bone abnormalities** (e.g., periostitis), and a **maculopapular rash**, which are not mentioned. *Neonatal sepsis* - Can present with **jaundice** and **hepatosplenomegaly**, and in severe cases, neurological involvement leading to symptoms like poor feeding or lethargy, but **microcephaly** is not a direct consequence. - It usually presents acutely in the postnatal period and is not directly linked to a maternal flu-like illness in pregnancy in the same way congenital infections are.

Question 849: What is the recommended technique for performing chest compressions on a newborn?

A. Using two fingers on the middle third of the sternum
B. Using two thumbs on the lower third of the sternum (Correct Answer)
C. Using three fingers on the lower third of the sternum
D. Using the palm on the lower third of the sternum

Explanation: ***Using two thumbs on the lower third of the sternum*** - The **two-thumb encircling technique** is recommended for newborns, especially when two rescuers are present, as it provides better coronary and cerebral perfusion pressures compared to the two-finger technique. - Compressions should be applied to the **lower third of the sternum**, just below the nipple line, to avoid injury to the xiphoid process. *Using two fingers on the middle third of the sternum* - The **two-finger technique** can be used if there is only one rescuer, but it is generally less effective in generating optimal perfusion than the two-thumb technique. - Compressing the **middle third of the sternum** is incorrect; the appropriate landmark is the lower third. *Using three fingers on the lower third of the sternum* - Using **three fingers** is generally not a standard recommended technique for neonatal CPR, as it can be difficult to achieve the correct depth and pressure distribution. - While the **lower third of the sternum** is correct, the multiple finger approach is less precise than the two-thumb or two-finger methods. *Using the palm on the lower third of the sternum* - Using the **palm of the hand** is too broad and provides excessive pressure for a fragile newborn's chest, risking serious injury to internal organs or ribs. - This technique is more appropriate for **adult CPR** and should not be applied to neonates.

Question 850: A newborn after prolonged labour is not breathing well and after 30 seconds of receiving 100% oxygen by bag and mask, heart rate is 88 beats per minute. What is the next step in management?

A. Discontinue oxygen and ventilation
B. Discontinue oxygen, continue ventilation
C. Continue oxygen and ventilation (Correct Answer)
D. Start chest compressions

Explanation: ***Continue oxygen and ventilation*** - A **heart rate less than 100 beats per minute** in a newborn needing resuscitation indicates ongoing compromise, mandating continued positive pressure ventilation. - The goal is to achieve a heart rate above 100 bpm, regular breathing, and improving oxygen saturation, which requires continued support. *Discontinue oxygen and ventilation* - This action would be appropriate only if the newborn's heart rate was **above 100 bpm** and they were breathing effectively. - Discontinuing support when the heart rate is 88 bpm would lead to further deterioration and potentially irreversible harm. *Discontinue oxygen, continue ventilation* - Reducing oxygen to room air might be considered if the newborn's **heart rate improves** and oxygen saturations are appropriate, but not when the heart rate is still below 100 bpm. - Continuing ventilation without adequate oxygen when indicated could be detrimental, as the goal is to improve oxygen delivery to tissues. *Start chest compressions* - Chest compressions are indicated when the newborn's heart rate remains **below 60 beats per minute** despite 30 seconds of effective positive pressure ventilation. - In this scenario, the heart rate is 88 bpm, which is above the threshold for initiating chest compressions but still requires continued ventilatory support.

Practice by Chapter

Neonatal Resuscitation

Practice Questions

Care of the Normal Newborn

Practice Questions

Prematurity and Low Birth Weight

Practice Questions

Respiratory Distress Syndrome

Practice Questions

Neonatal Jaundice

Practice Questions

Neonatal Sepsis

Practice Questions

Necrotizing Enterocolitis

Practice Questions

Intraventricular Hemorrhage

Practice Questions

Persistent Pulmonary Hypertension

Practice Questions

Perinatal Asphyxia

Practice Questions

Neonatal Seizures

Practice Questions

Congenital Anomalies

Practice Questions

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