Neonatology Practice Questions

Q: Which of the following is NOT included in the resuscitation of a neonate with HR < 60/min?

None of the above. ***None of the above*** - All listed interventions—**endotracheal tube intubation**, **chest compressions**, and **adrenaline administration**—are standard components of neonatal resuscitation when the heart rate remains below 60 beats/min despite initial steps. - This question asks which is *NOT* included, implying that all options are, in fact, appropriate interventions in this critical scenario. *Endotracheal tube intubation* - This is a critical step in **securing the airway** and ensuring effective positive pressure ventilation when other methods fail or prolonged mechanical ventilation is anticipated. - It's indicated if the heart rate remains below 60 bpm despite adequate bag-mask ventilation and chest compressions. *Chest compression* - **Chest compressions** are initiated when the heart rate is less than 60 bpm *after* 30 seconds of effective positive pressure ventilation. - They are used in conjunction with positive pressure ventilation to improve cardiac output and myocardial perfusion. *Adrenaline* - **Adrenaline** is administered if the heart rate remains below 60 bpm *despite* adequate ventilation and chest compressions. - It acts as a potent **vasopressor** and **cardiac stimulant**, increasing heart rate and contractility.

Q: A term neonate, with a birth weight of 2700 g, who is otherwise well, and is exclusively breastfed, presents for routine evaluation. His total serum bilirubin is found to be 14mg/dl on day 5. What is the management?

No active treatment required. ***No active treatment required*** - A total serum bilirubin of **14 mg/dL** on day 5 in an otherwise well, exclusively breastfed term neonate (birth weight 2700g, which is >2500g) falls within the **physiologic jaundice range** and below thresholds for intervention. - This level is considered **normal for breastfed infants** at this age and does not warrant medical intervention as per current guidelines. *Stop breastfeeding for 2 days* - This intervention, known as **breast milk jaundice interruption**, is usually reserved for higher bilirubin levels or if there is concern for significant breast milk jaundice, which is not indicated here. - Temporarily stopping breastfeeding can disrupt the establishment of breastfeeding and is generally discouraged unless strictly necessary. *Phototherapy* - **Phototherapy** is indicated for bilirubin levels typically >15-18 mg/dL in a healthy term neonate on day 5, depending on risk factors, which this infant does not meet. - It works by converting unconjugated bilirubin into water-soluble isomers that can be excreted more easily. *Exchange transfusion* - **Exchange transfusion** is reserved for severe hyperbilirubinemia, usually with bilirubin levels approaching or exceeding 20-25 mg/dL, especially if there are signs of **acute bilirubin encephalopathy**. - This level is far below the threshold for such an invasive procedure.

Q: Which among the following is NOT part of the classic clinical triad of necrotizing enterocolitis?

Metabolic acidosis. ***Metabolic acidosis*** - Metabolic acidosis is **not** part of the classic clinical triad of necrotizing enterocolitis, though it is a common laboratory finding in severe cases. - The **classic triad of NEC** consists of: **abdominal distension**, **bloody stools**, and **pneumatosis intestinalis** on radiography. - Metabolic acidosis occurs as a consequence of intestinal ischemia and sepsis but is not included in the defining triad. *Abdominal distension* - **Abdominal distension** is a cardinal clinical feature and part of the classic triad. - Results from intestinal inflammation, ileus, and gas accumulation. *Bloody stools* - **Bloody stools** (grossly bloody or occult blood positive) are part of the classic triad. - Reflect mucosal injury and intestinal necrosis. *Pneumatosis intestinalis* - **Pneumatosis intestinalis** (intramural gas on abdominal X-ray) is the pathognomonic radiological finding in the classic triad. - Indicates gas-forming bacterial invasion of the damaged intestinal wall.

Q: Which of the following should be considered a 'High risk infant'?

Antenatal preeclampsia. ***Antenatal preeclampsia*** - **Preeclampsia** is a serious pregnancy complication characterized by high blood pressure and signs of damage to other organ systems, posing significant risks to both mother and fetus. - Infants born to mothers with preeclampsia are at higher risk for **preterm birth**, **intrauterine growth restriction (IUGR)**, and complications like **respiratory distress syndrome**, classifying them as high-risk. *Folic acid tablet not consumed* - Maternal non-consumption of **folic acid** primarily increases the risk of **neural tube defects (NTDs)** in the fetus, but this alone does not classify the infant as high-risk after birth unless an NTD is diagnosed. - While important for healthy fetal development, a lack of folic acid intake is a risk factor for a specific congenital anomaly, rather than a general high-risk infant indicator post-birth without further complications. *Working mother* - A mother's employment status, while potentially affecting access to childcare or breastfeeding routines, does not inherently categorize an infant as **high-risk** from a medical standpoint. - This is a social factor and not a direct indicator of increased medical vulnerability or adverse health outcomes for the infant. *Mal-presentation* - **Malpresentation** refers to an abnormal position of the fetus in the uterus at the time of delivery (e.g., breech). While it poses risks during labor and delivery, often necessitating a **cesarean section**, it does not automatically classify the infant as high-risk post-birth unless complications arose during delivery. - The risk is primarily associated with the birth process itself, and if the delivery is managed appropriately with no resulting trauma or compromise, the infant may not be considered high-risk.

Q: What is the preferred management for patent ductus arteriosus (PDA) in a preterm infant?

IV Indomethacin. ***IV Indomethacin*** - **Indomethacin** is a **prostaglandin synthesis inhibitor** that promotes the constriction and closure of the patent ductus arteriosus. - It is preferred due to its effectiveness in closing PDA non-invasively in preterm infants. *Surgical ligation* - This is an **invasive procedure** reserved for cases where medical management with indomethacin fails or is contraindicated. - While effective, it carries surgical risks such as **infection** and potential **vocal cord paralysis**. *Diuretics* - **Diuretics** are used to manage **pulmonary edema** or **heart failure symptoms** associated with a large PDA by reducing fluid overload. - They do not directly cause the closure of the patent ductus arteriosus itself. *Oxygen therapy* - **Oxygen therapy** is crucial for managing respiratory distress and maintaining adequate oxygen saturation in preterm infants. - However, oxygen can sometimes *inhibit* ductal closure in preterm infants by reducing pulmonary vascular resistance, and therefore, it is not the primary intervention for PDA closure.

Q: A newborn has a heart rate <60 bpm despite 30 seconds of adequate positive pressure ventilation. What is the next step?

Begin chest compressions. ***Begin chest compressions*** - According to **neonatal resuscitation guidelines (NRP)**, if the heart rate remains below 60 beats per minute despite 30 seconds of effective **positive pressure ventilation (PPV)**, chest compressions should be initiated. - Chest compressions are administered at a ratio of 3 compressions to 1 breath, aiming for a rate of 90 compressions and 30 breaths per minute. *Start IV fluids* - **IV fluids** are generally considered in cases of documented or suspected **hypovolemia** or shock that does not respond to initial resuscitative efforts. - They are not the immediate next step for a newborn with a heart rate below 60 after oxygenation and ventilation. *Administer adrenaline* - **Adrenaline (epinephrine)** is typically given if the heart rate remains below 60 bpm despite adequate ventilations and chest compressions. - It is often administered intravenously or intraosseously, or via an endotracheal tube if IV/IO access is not immediately available. *Increase oxygen flow* - The initial step for a bradycardic newborn is usually effective **positive pressure ventilation** with appropriate oxygen concentration, often starting with 21% or higher depending on gestational age and clinical status. - Simply increasing oxygen flow without ensuring effective ventilation will not adequately address the underlying respiratory failure and persistent bradycardia.

Q: In neonatal sepsis, which of the following organisms is the MOST common cause?

Group B Streptococcus. ***Group B Streptococcus*** - **Group B Streptococcus (GBS)**, or *Streptococcus agalactiae*, is a leading cause of both early-onset and late-onset neonatal sepsis. - **Vertical transmission** from mother to neonate during birth is the most common route of infection, especially in early-onset cases. *Mycoplasma* - While *Mycoplasma hominis* and *Ureaplasma urealyticum* can be associated with **chorioamnionitis** and premature birth, they are less common causes of overt neonatal sepsis compared to GBS. - Their detection often requires specialized culture media, and their clinical presentation can be more insidious. *Shigella* - **Shigella species** primarily cause **bacillary dysentery** (shigellosis) characterized by bloody diarrhea. - While it can cause systemic illness, it is a very rare cause of neonatal sepsis, especially in the absence of a primary gastrointestinal infection. *Escherichia coli* - **E. coli** is a significant cause of neonatal sepsis, particularly strains with **K1 capsular antigen**, which are known for causing meningitis and sepsis in neonates. - Although *E. coli* is a common pathogen, **Group B Streptococcus** is generally considered the *most common* cause, especially in early-onset sepsis.

Question 1

Which of the following is NOT included in the resuscitation of a neonate with HR < 60/min?

Accepted Answer

None of the above

Answer

Endotracheal tube intubation

Answer

Chest compression

Answer

Adrenaline

Question 2

Which of the following is most specific for congenital Rubella syndrome?

Accepted Answer

Triad of CRS are cataract, cardiac defects, sensorineural deafness

Answer

Blueberry muffin rash is seen

Answer

Infection is most serious in the first trimester of pregnancy

Answer

Virus can be isolated up to 12 months after birth

Question 3

A term neonate, with a birth weight of 2700 g, who is otherwise well, and is exclusively breastfed, presents for routine evaluation. His total serum bilirubin is found to be 14mg/dl on day 5. What is the management?

Accepted Answer

No active treatment required

Answer

Stop breastfeeding for 2 days

Answer

Phototherapy

Answer

Exchange transfusion

Question 4

Which among the following is NOT part of the classic clinical triad of necrotizing enterocolitis?

Accepted Answer

Metabolic acidosis

Answer

Bloody stools

Answer

Pneumatosis intestinalis

Answer

Abdominal distension

Question 5

A newborn presents with snuffles, hepatosplenomegaly, and osteochondritis. Mother's VDRL is 1:32. Most appropriate initial investigation is:

Accepted Answer

Quantitative VDRL of newborn

Answer

Dark field microscopy of nasal discharge

Answer

CSF examination

Answer

X-ray long bones

Question 6

A newborn has positive VDRL but no clinical signs. Mother was treated for syphilis at 32 weeks gestation. Newborn's titer is 1:2, mother's current titer is 1:8. Most appropriate management is:

Accepted Answer

Close clinical monitoring only

Answer

CSF analysis followed by treatment

Answer

Aqueous penicillin for 10 days

Answer

Single dose benzathine penicillin

Question 7

Which of the following should be considered a 'High risk infant'?

Accepted Answer

Antenatal preeclampsia

Answer

Folic acid tablet not consumed

Answer

Working mother

Answer

Mal-presentation

Question 8

What is the preferred management for patent ductus arteriosus (PDA) in a preterm infant?

Accepted Answer

IV Indomethacin

Answer

Surgical ligation

Answer

Diuretics

Answer

Oxygen therapy

Question 9

A newborn has a heart rate <60 bpm despite 30 seconds of adequate positive pressure ventilation. What is the next step?

Accepted Answer

Begin chest compressions

Answer

Start IV fluids

Answer

Administer adrenaline

Answer

Increase oxygen flow

Question 10

In neonatal sepsis, which of the following organisms is the MOST common cause?

Accepted Answer

Group B Streptococcus

Answer

Mycoplasma

Answer

Shigella

Answer

Escherichia coli

Neonatology — MCQs

Neonatology — MCQs

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