Neonatology Practice Questions

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.

Q: 4 day old breastfed neonate, otherwise well, term neonate presented with jaundice, on testing the bilirubin level was found to be 18 mg/dl. Which of the following is the best step of management?

Start phototherapy and continue breast feeding. ***Start phototherapy and continue breast feeding*** - For a 4-day-old, otherwise healthy, term neonate with a bilirubin level of 18 mg/dL, **phototherapy** is the recommended initial treatment to lower bilirubin levels and prevent **kernicterus**. - **Breastfeeding should be continued** as it is crucial for hydration and nutrition, and interruption is generally not needed unless the bilirubin levels are extremely high and unresponsive to phototherapy. *Stop breast feeding and do phototherapy* - **Stopping breastfeeding is usually not necessary** for a bilirubin level of 18 mg/dL in a healthy, term neonate, as the benefits of breast milk outweigh the risks associated with this level of jaundice. - While **phototherapy** is appropriate, discontinuing breastfeeding can lead to complications such as dehydration and decreased milk supply. *Initiate exchange transfusion* - **Exchange transfusion** is typically reserved for much higher bilirubin levels (e.g., >25 mg/dL in a term neonate) or when there are signs of **acute bilirubin encephalopathy**, which are not present here. - It is an invasive procedure with potential risks, making it unsuitable as a first-line treatment for this bilirubin level. *Start iv fluids and given phototherapy* - **Intravenous fluids** are generally not indicated for an otherwise well, breastfed neonate unless there are signs of significant dehydration, which is not mentioned in this scenario. - While **phototherapy** is appropriate, routine IV fluid administration can lead to **fluid overload** and is not standard practice in uncomplicated neonatal jaundice.

Q: Neonatal tetanus most commonly presents with:

Poor feeding. ***Poor feeding*** - The initial signs of neonatal tetanus include **irritability**, **poor sucking**, and **difficulty feeding**, usually appearing between 3 and 14 days of life. - This symptom is due to the toxin affecting cranial nerves and early muscle spasms, making it difficult for the infant to open their mouth or swallow. *Seizures* - While seizures can occur in severe neonatal tetanus, they are typically a **later manifestation** after initial symptoms like poor feeding and muscle rigidity. - **Generalized muscle spasms** and opisthotonus usually precede frank seizures. *Respiratory failure* - **Respiratory failure** is a serious complication of neonatal tetanus, often leading to death, but it results from severe, sustained muscle spasms of the respiratory muscles. - It usually occurs **after the initial signs** of poor feeding and generalized rigidity have developed. *Fever* - **Fever** is not a primary or most common initial symptom of neonatal tetanus, though a low-grade fever may be present in some cases. - The disease is primarily characterized by neurological symptoms due to the action of **tetanospasmin**, not direct pyrogenic effects.

Q: A sick intubated neonate is having bilateral jerk of both right and left upper limbs with some occasional twitching of neck as well. Likely type of seizures:

Multifocal clonic. ***Multifocal clonic*** - This description fits **multifocal clonic seizures**, characterized by **migratory clonic activity** observed in different body parts at varying times, sometimes simultaneously. - The **bilateral jerk** of upper limbs and occasional neck twitching point to this pattern, as the involvement is not uniform or generalized, but rather appears in multiple, distinct locations. *Multifocal tonic clonic* - This option incorrectly combines multifocal activity with a **tonic component**, which is described as stiffening or sustained contraction, not just jerking. - While activity may be multifocal, the specific description of "jerk" primarily suggests a **clonic nature**, without a clear tonic phase. *Focal tonic* - **Focal tonic seizures** involve sustained **stiffening or contraction** of muscles in a specific, localized area of the body, which is not described. - The term "jerk" indicates a **clonic movement**, and the involvement of multiple areas (bilateral upper limbs, neck) rules out a single focal onset. *Focal clonic* - **Focal clonic seizures** are characterized by rhythmic jerking movements limited to a **single, localized part** of the body without spreading to other areas. - The presence of jerking in **both upper limbs** and occasional neck twitching indicates activity in multiple sites, not restricted to a single focal area.

Q: According to neonatal resuscitation protocol, how much oxygen to give in a term neonate with apnea and bradycardia initially?

21%. ***21%*** - According to **NRP (Neonatal Resuscitation Program) 2020 guidelines**, for **term neonates (≥35 weeks gestation)** requiring resuscitation, the initial recommendation is to use **room air (21% oxygen)** to minimize the risk of hyperoxia and oxidative injury. - Multiple randomized controlled trials have demonstrated that room air is as effective as 100% oxygen for initial resuscitation. - Supplemental oxygen is only added if **oxygen saturation targets** are not met despite adequate ventilation, and should be titrated using **pulse oximetry**. *30%* - This concentration is **higher than room air** and is not the initial recommendation for term neonates needing resuscitation. - Starting with a higher oxygen concentration can lead to **oxidative stress** without immediate benefit. - Higher initial concentrations (21-30%) are reserved for **preterm neonates (<35 weeks)**. *100%* - Administering **100% oxygen** can be harmful to a neonate, potentially causing **oxidative injury** to developing organs, including the lungs, brain, and retina. - This was the old practice but has been **discontinued** based on evidence showing increased mortality and morbidity. - High concentrations are no longer recommended even in severe cases; oxygen should be titrated to saturation targets. *50%* - While lower than 100%, 50% oxygen is still **not the initial recommended concentration** for term neonates in resuscitation protocols. - The goal is to start with **21% oxygen** and gradually increase based on **pulse oximetry monitoring** and target saturation ranges if 21% is insufficient.

Q: Which of the following is the most common cause of early-onset neonatal sepsis?

Group B Streptococcus. ***Group B Streptococcus*** - **Group B Streptococcus (GBS)**, or *Streptococcus agalactiae*, is the **most common bacterial cause of early-onset neonatal sepsis** (within the first 7 days of life) in many populations. - Transmission typically occurs vertically from the mother's vaginal flora during birth. - **Intrapartum antibiotic prophylaxis** in GBS-positive mothers has significantly reduced incidence in developed countries. *Escherichia coli* - **E. coli** is the **second most common cause of early-onset sepsis** and the **leading cause in preterm and very low birth weight infants**. - Can be transmitted from the maternal genital tract during delivery. - Associated with higher mortality rates than GBS, particularly in preterm neonates. *Listeria monocytogenes* - While *Listeria monocytogenes* can cause **neonatal sepsis and meningitis**, it is far less common than GBS or E. coli. - Associated with maternofetal transmission from **foodborne infection** in the mother. - Can cause early or late-onset disease. *Klebsiella pneumoniae* - *Klebsiella pneumoniae* is more commonly associated with **late-onset neonatal sepsis**, particularly in **premature or critically ill neonates** in NICU settings. - Often associated with **hospital-acquired infections** and invasive procedures. - In some regions, particularly in developing countries, it can also cause early-onset disease.

Question 1

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 2

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 3

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 4

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 5

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

Question 6

4 day old breastfed neonate, otherwise well, term neonate presented with jaundice, on testing the bilirubin level was found to be 18 mg/dl. Which of the following is the best step of management?

Accepted Answer

Start phototherapy and continue breast feeding

Answer

Stop breast feeding and do phototherapy

Answer

Initiate exchange transfusion

Answer

Start iv fluids and give phototherapy

Question 7

Neonatal tetanus most commonly presents with:

Accepted Answer

Poor feeding

Answer

Seizures

Answer

Respiratory failure

Answer

Fever

Question 8

A sick intubated neonate is having bilateral jerk of both right and left upper limbs with some occasional twitching of neck as well. Likely type of seizures:

Accepted Answer

Multifocal clonic

Answer

Multifocal tonic clonic

Answer

Focal tonic

Answer

Focal clonic

Question 9

According to neonatal resuscitation protocol, how much oxygen to give in a term neonate with apnea and bradycardia initially?

Accepted Answer

21%

Answer

100%

Answer

50%

Answer

30%

Question 10

Which of the following is the most common cause of early-onset neonatal sepsis?

Accepted Answer

Group B Streptococcus

Answer

Listeria monocytogenes

Answer

Klebsiella pneumoniae

Answer

Escherichia coli

Neonatology — MCQs

Neonatology — MCQs

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