Neonatology Practice Questions

Q: Chronic lung disease in infancy is defined as

Need for supplemental oxygen at 36 weeks postmenstrual age. ***Need for supplemental oxygen at 36 weeks after conception*** - **Chronic lung disease (CLD)**, also known as **bronchopulmonary dysplasia (BPD)**, is defined by the need for **supplemental oxygen** at 36 weeks postmenstrual age (corrected gestational age) or at 56 days postnatal age, whichever comes first, for infants born before 32 weeks gestation. - This definition reflects persistent respiratory morbidity requiring ongoing support, indicative of lung injury and abnormal development. *Tachypnoea > 50 breaths/ min within 1 week of birth* - **Tachypnoea** within the first week of birth can be a symptom of various neonatal respiratory conditions, such as **transient tachypnoea of the newborn (TTN)** or **respiratory distress syndrome (RDS)**, but it is not a defining feature of CLD. - CLD is characterized by a *prolonged* need for respiratory support, not just an acute symptom in the first week. *Presence of bilateral infiltrates on chest Xray for 2 weeks* - **Bilateral infiltrates** on a chest X-ray over two weeks could suggest conditions like **pneumonia** or **ARDS**, but it is not the diagnostic criterion for CLD. - The definition of CLD focuses on the physiological need for oxygen, rather than specific radiographic findings in isolation. *Reticulogranular pattern on chest Xray for 6 weeks* - A **reticulogranular pattern** on chest X-ray is characteristic of **respiratory distress syndrome (RDS)**, typically seen in premature infants due to surfactant deficiency. - While RDS can precede CLD, a **reticulogranular pattern** typically improves with treatment (surfactant therapy, ventilation) and does not persist for 6 weeks as a defining feature of chronic lung disease.

Q: What is the most common cause of pneumonia in early onset sepsis in neonates?

Group B streptococcus. ***Group B streptococcus*** - **Group B Streptococcus (GBS)** is the leading cause of **early-onset sepsis** and pneumonia in neonates, typically acquired during passage through the birth canal. - Maternal GBS colonization is a significant risk factor, and GBS can cause **severe respiratory distress** in affected newborns. *H influenzae* - **_Haemophilus influenzae_** is a more common cause of **late-onset sepsis** or pneumonia in infants and children, rather than early-onset neonatal disease. - While it can cause neonatal infections, it is much less frequent than GBS in the early-onset period. *Coagulase positive staph aureus* - **_Staphylococcus aureus_** is a common cause of **nosocomial infections** or late-onset sepsis in neonates, particularly in ventilated or catheterized infants. - It is not the most common pathogen for community-acquired **early-onset neonatal pneumonia**. *Listeria* - **_Listeria monocytogenes_** can cause severe neonatal sepsis and pneumonia, often associated with maternal consumption of contaminated food. - While it is a significant pathogen, it is less common overall than GBS as a cause of early-onset neonatal pneumonia in most regions.

Q: Treatment of choice for symptomatic neonatal hypoglycemia is

10% dextrose. ***10% dextrose*** - For **symptomatic neonatal hypoglycemia**, 10% dextrose solution is the **standard initial treatment** with a bolus of 2 mL/kg (200 mg/kg) given IV over 5-10 minutes - This concentration safely and effectively raises blood glucose levels while minimizing the risk of **hyperglycemic rebound** or complications like **osmotic injury** - Followed by continuous infusion to maintain normoglycemia *Dextrose normal saline* - This combination is **not used** for acute hypoglycemia management as the saline component is unnecessary - The glucose concentration would be inadequate for rapid correction of **symptomatic neonatal hypoglycemia** - May lead to excessive fluid administration *5% dextrose* - A **5% dextrose solution** is insufficient to rapidly correct symptomatic neonatal hypoglycemia - Would require much faster infusion rates to deliver adequate glucose, potentially leading to **fluid overload** - May be used for maintenance therapy in asymptomatic cases *25% dextrose* - Too concentrated for routine neonatal use - carries significant risk of **vein sclerosis**, **osmotic injury**, and **rebound hypoglycemia** - Risk of extravasation injury and **hyperglycemia** - Reserved only for extreme cases under close monitoring with careful dilution

Q: A newborn presents with subconjunctival hemorrhage. The treatment is

No treatment. ***No treatment*** - **Subconjunctival hemorrhage** in a newborn is typically **benign** and **resolves spontaneously** within **1-2 weeks**. - It is often caused by the trauma of birth and does not require intervention. *Antibiotic eye drops* - These are indicated for **bacterial conjunctivitis** or to prevent bacterial infection, which is not the case here. - Using antibiotics without a bacterial indication is unnecessary and can contribute to **antibiotic resistance**. *Aspiration* - **Aspiration** is an invasive procedure and is **not indicated** for a subconjunctival hemorrhage, which is a collection of blood under the conjunctiva. - It could cause further damage or introduce infection. *Antibiotic and steroid drops* - **Steroid drops** are typically used to reduce **inflammation**, which is not the primary issue in a subconjunctival hemorrhage. - Like plain antibiotic drops, the **antibiotic component** is not necessary in the absence of infection.

Q: Most common site for bone marrow aspiration in neonates is -

Anteromedial tibia. ***Anteromedial tibia*** - The **anteromedial tibia** is the preferred site in neonates due to its relatively **large marrow cavity**, superficial location, and reduced risk of vital organ injury. - This site is easily accessible and provides a good yield of marrow cells, making it suitable for diagnostic purposes in newborns. *Anterior superior iliac crest* - While a common site for bone marrow aspiration in older children and adults, the **anterior superior iliac crest** can be more challenging and poses a greater risk in neonates due to their smaller bone structures. - The iliac crest offers less bony prominence and a thinner cortex in neonates, increasing the difficulty of the procedure and potential for sampling error. *Posterior superior iliac crest* - The **posterior superior iliac crest** is another common site in older children and adults but is generally avoided in neonates due to the difficulty in positioning and the risk of damaging vital structures in the vicinity. - It requires prone positioning and offers less superficial bone, making it a less practical and safe choice for neonates compared to the tibia. *Sternum* - **Sternal aspiration** is generally contraindicated in neonates and young children due to the thinness of the sternal bone and proximity to vital structures like the heart and great vessels. - There is a high risk of **perforation** of the sternum and injury to underlying organs, making this site unsafe for bone marrow aspiration in this age group.

Q: A 45-day-old infant presents with seizures. Examination reveals he is icteric, has bulging fontanelles, and exhibits opisthotonic posture. Which of the following treatments is NOT indicated?

Chlorpromazine. ***Chlorpromazine*** - Chlorpromazine is an **antipsychotic medication** and is **contraindicated** in infants, especially in the presence of seizures and central nervous system (CNS) dysfunction, due to its potential to **lower the seizure threshold** and cause severe extrapyramidal symptoms. - Its mechanism of action via **dopamine receptor blockade** is not relevant for treating bilirubin encephalopathy or its symptoms. *Phototherapy* - Phototherapy is a primary treatment for **neonatal jaundice** to reduce unconjugated bilirubin levels and prevent neurotoxicity. - While the infant's condition suggests severe hyperbilirubinemia with complications, phototherapy would still be indicated as an initial step or adjunct to further interventions, especially if the bilirubin levels are still rising. *Exchange Transfusion* - Exchange transfusion is a **definitive treatment** for severe hyperbilirubinemia, especially when there are signs of **acute bilirubin encephalopathy (kernicterus)**, as suggested by seizures, bulging fontanelles, and opisthotonus. - It rapidly removes bilirubin from the blood and is crucial to prevent further neurological damage in such critical cases. *Phenobarbital* - Phenobarbital is an **anticonvulsant** used to manage seizures, which are a prominent symptom in this infant. - It can also help to **induce hepatic enzymes** involved in bilirubin metabolism, thereby potentially aiding in the reduction of bilirubin levels in cases of severe hyperbilirubinemia, though its primary role here would be seizure control.

Q: Erythematous blotchy rash is seen on the abdomen, trunk, and face of a 3-day-old child along with yellowish papules. The child appears well. What is the appropriate management?

No treatment. ***No treatment (Correct Answer)*** The described symptoms—erythematous blotchy rash with yellowish papules on the abdomen, trunk, and face in a well-appearing 3-day-old neonate—are **classic for erythema toxicum neonatorum**. **Key Features:** - **Benign, self-limiting rash** of unknown etiology - Affects **50-70% of term newborns** - Typically appears on **days 2-5** of life - Characterized by **erythematous macules/patches** with overlying **yellowish-white papules/pustules** - Infant appears **well and thriving** - **Resolves spontaneously** within 1-2 weeks without treatment - Histology shows **eosinophils** in pustules **Management:** Reassurance to parents; no medical intervention required. --- *Topical steroid and antibiotic lotion (Incorrect)* This approach is inappropriate because erythema toxicum neonatorum is: - **Not an infection** (no bacterial or fungal cause) - **Not an inflammatory condition** requiring steroids - Misdiagnosis and overtreatment could lead to unnecessary side effects, antibiotic resistance, and mask other conditions --- *Topical steroid cream (Incorrect)* Topical steroids are: - **Unnecessary** for this benign, self-resolving condition - **Potentially harmful** in neonates (can cause skin atrophy, increased absorption) - Provide **no therapeutic benefit** for erythema toxicum neonatorum --- *Intravenous antibiotics (Incorrect)* Systemic antibiotics are: - **Entirely unwarranted** as this is a non-infectious, benign rash - Would represent **gross overtreatment** with significant risks - Contribute to **antibiotic resistance** - Carry risks of adverse reactions, disruption of normal flora, and unnecessary hospitalization **Differentials to consider (but not present here):** - Transient neonatal pustular melanosis (present at birth) - Neonatal acne (appears later, at 2-4 weeks) - Miliaria (smaller, clear vesicles) - Infectious causes (infant appears ill, requires septic workup)

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

BCG Vaccine. ***BCG Vaccine*** - The **BCG vaccine** (Bacille Calmette-Guérin) is used to prevent tuberculosis and is not a known cause of **neonatal bradycardia**. - While it can cause local reactions or, rarely, disseminated disease in immunocompromised infants, it does not directly affect heart rate. *Hypoxia* - **Hypoxia** is a common and critical cause of **neonatal bradycardia**, as the heart attempts to conserve energy and oxygen in response to insufficient oxygen supply. - Severe or prolonged hypoxia can lead to **myocardial depression** and further compromise cardiac function. *Hypothermia* - **Hypothermia** (low body temperature) can significantly depress the **central nervous system** and **metabolic rate** in neonates. - This physiological response often leads to a decreased heart rate, resulting in **bradycardia**. *Head injury* - **Head injury** in neonates, especially severe forms, can increase **intracranial pressure** and stimulate the **vagal nerve**. - **Vagal stimulation** can lead to a decrease in heart rate, manifesting as **bradycardia**.

Q: Which of the following is a common symptom of Hypoxic Ischemic Encephalopathy?

Seizures. ***Seizures*** - **Seizures** are a very common and early symptom of **Hypoxic-Ischemic Encephalopathy (HIE)** due to neuronal injury and dysfunction. - They can manifest in various forms, including tonic, clonic, or multifocal types, and often indicate the severity of brain damage. *Lower limbs affected more than upper limbs* - The pattern of motor impairment in HIE typically involves the **upper limbs more than the lower limbs** due to the specific vulnerability of cortical regions supplying the upper extremities and face. - This is in contrast to conditions like **cerebral palsy from periventricular leukomalacia**, which characteristically affects the lower limbs more. *Predominant trunk involvement* - While HIE can cause widespread neurological dysfunction, **isolated or predominant trunk involvement** is not a characteristic presenting symptom. - Motor deficits usually involve the extremities and cranial nerves, reflecting diffuse or focal brain injury. *Proximal muscles affected more than distal muscles* - The distribution of muscle weakness in HIE does not typically show a clear pattern of **proximal over distal involvement**. - Instead, the motor deficits are often widespread or show predilection for the upper extremities, depending on the extent and location of brain injury.

Q: Further investigation is essential in a newborn with which of the following conditions?

Lens opacity. ***Lens opacity*** - A **lens opacity** in a newborn suggests congenital **cataracts**, which can lead to permanent vision impairment if not identified and treated early. - **Investigation is essential** to identify underlying causes such as **TORCH infections** (Toxoplasmosis, Rubella, CMV, HSV), **metabolic disorders** (galactosemia, Lowe syndrome), **genetic syndromes**, or **chromosomal abnormalities**. - Early detection and management are crucial to prevent **amblyopia** (lazy eye) and optimize visual development during the **critical period** of visual maturation. - Investigations include: TORCH titers, urine for reducing substances, metabolic screening, and genetic evaluation. *Erythema toxicum* - This is a common, **benign newborn rash** characterized by blotchy red macules and papules with central vesicles or pustules. - It typically resolves spontaneously within days to a few weeks and requires **no specific investigation or treatment**. *Vaginal bleed* - A small amount of **vaginal bleeding** in female newborns is usually due to the temporary withdrawal of maternal hormones (e.g., estrogen) after birth. - This is a **physiologic response** and generally self-resolves, requiring no further investigation unless excessive or prolonged. *Subconjunctival hemorrhage* - This occurs due to the rupture of tiny blood vessels in the eye during the birthing process, often associated with **vaginal delivery**. - It is a **benign condition** that resolves on its own within a couple of weeks and does not affect vision.

Question 1

Chronic lung disease in infancy is defined as

Accepted Answer

Need for supplemental oxygen at 36 weeks postmenstrual age

Answer

Tachypnoea > 50 breaths/ min within 1 week of birth

Answer

Presence of bilateral infiltrates on chest Xray for 2 weeks

Answer

Reticulogranular pattern on chest Xray for 6 weeks

Question 2

What is the most common cause of pneumonia in early onset sepsis in neonates?

Accepted Answer

Group B streptococcus

Answer

H influenzae

Answer

Coagulase positive staph aureus

Answer

Listeria

Question 3

Treatment of choice for symptomatic neonatal hypoglycemia is

Accepted Answer

10% dextrose

Answer

Dextrose normal saline

Answer

5% dextrose

Answer

25% dextrose

Question 4

A newborn presents with subconjunctival hemorrhage. The treatment is

Accepted Answer

No treatment

Answer

Antibiotic eye drops

Answer

Antibiotic and steroid drops

Answer

Aspiration

Question 5

Most common site for bone marrow aspiration in neonates is -

Accepted Answer

Anteromedial tibia

Answer

Anterior superior iliac crest

Answer

Posterior superior iliac crest

Answer

Sternum

Question 6

A 45-day-old infant presents with seizures. Examination reveals he is icteric, has bulging fontanelles, and exhibits opisthotonic posture. Which of the following treatments is NOT indicated?

Accepted Answer

Chlorpromazine

Answer

Phenobarbital

Answer

Phototherapy

Answer

Exchange Transfusion

Question 7

Erythematous blotchy rash is seen on the abdomen, trunk, and face of a 3-day-old child along with yellowish papules. The child appears well. What is the appropriate management?

Accepted Answer

No treatment

Answer

Topical steroid and antibiotic lotion

Answer

Topical steroid cream

Answer

Intravenous antibiotics

Question 8

Which of the following is NOT a recognized cause of neonatal bradycardia?

Accepted Answer

BCG Vaccine

Answer

Hypothermia

Answer

Head injury

Answer

Hypoxia

Question 9

Which of the following is a common symptom of Hypoxic Ischemic Encephalopathy?

Accepted Answer

Seizures

Answer

Lower limbs affected more than upper limbs

Answer

Predominant trunk involvement

Answer

Proximal muscles affected more than distal muscles

Question 10

Further investigation is essential in a newborn with which of the following conditions?

Accepted Answer

Lens opacity

Answer

Vaginal bleed

Answer

Subconjunctival hemorrhage

Answer

Erythema toxicum

Neonatology — MCQs

Neonatology — MCQs

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