Neonatology Practice Questions

Q: What is the threshold for hyperglycemia in neonates?

150 mg/dl. ***150 mg/dl*** - A blood glucose level greater than **150 mg/dL** is the **standard threshold** most commonly taught and used for defining **hyperglycemia** in neonates. - This value is widely accepted in clinical practice and guides decisions regarding **glucose management** and potential **insulin therapy** in this population. - This threshold is particularly relevant for term and late preterm neonates. *125 mg/dl* - While **125 mg/dL** represents an elevated glucose level and some newer guidelines consider this as a threshold (especially >7 mmol/L), it is **not the standard taught threshold** of 150 mg/dL. - For examination purposes, **150 mg/dL** remains the recognized standard definition. *180 mg/dl* - A blood glucose level of **180 mg/dL** indicates **severe hyperglycemia** rather than the initial threshold for defining hyperglycemia. - While some protocols for extremely preterm infants may use higher cutoffs, this exceeds the standard diagnostic threshold. - Intervention is typically initiated well before reaching this level to prevent complications. *100 mg/dl* - A blood glucose level of **100 mg/dL** in a neonate falls within the **normal range**, not hyperglycemia. - This level is desirable for proper brain development and metabolic function. - Normal neonatal glucose ranges from approximately **40-100 mg/dL** in the first days of life.

Q: Which of the following is a common symptom of neonatal lupus?

Cutaneous lesion. ***Cutaneous lesion*** - **Cutaneous lesions** are the most common manifestation of neonatal lupus, typically appearing as an **annular erythematous rash** on the face and scalp. - These lesions often develop after exposure to **ultraviolet light** and usually resolve within 6 months as maternal autoantibodies clear from the infant's system. *Thrombocytopenia* - While **hematologic abnormalities** such as thrombocytopenia can occur in neonatal lupus, they are less common than cutaneous lesions. - **Thrombocytopenia** refers to a low platelet count, which can increase the risk of bleeding. *All of the options* - While all listed options (cutaneous lesions, thrombocytopenia, and heart block) can be features of neonatal lupus, **cutaneous lesions** are the most frequently observed symptom. - Choosing "All of the options" would imply equal commonality or presence of all in every case, which is not accurate. *Heart block* - **Congenital heart block** is a serious, but less common and often irreversible, manifestation of neonatal lupus, caused by maternal antibodies attacking the fetal cardiac conduction system. - It usually presents as **bradycardia** and may require a pacemaker, but it is not the most common symptom overall.

Q: What is the correct dose of i.v. adrenaline in term infants during neonatal resuscitation?

0.1-0.3 ml/kg in 1:10,000. ***0.1-0.3 ml/kg in 1:10,000*** - The recommended intravenous adrenaline dose for neonatal resuscitation is **0.01-0.03 mg/kg** using a **1:10,000 solution (0.1 mg/mL)**. - Volume calculation: 0.01-0.03 mg/kg ÷ 0.1 mg/mL = **0.1-0.3 mL/kg**. - This is the standard dose as per **NRP (Neonatal Resuscitation Program)** and **AHA guidelines** [2]. - The 1:10,000 concentration is safer for IV/umbilical venous catheter administration in neonates. *0.01-0.03 ml/kg in 1:1,000* - This volume is far too low for a 1:1,000 solution. - Would deliver only 0.01-0.03 mg total (not per kg), resulting in a **sub-therapeutic dose**. - The 1:1,000 concentration contains 1 mg/mL, which is **10 times more concentrated** than the recommended dilution. *0.3-0.5 ml/kg in 1:10,000* - This volume would deliver 0.03-0.05 mg/kg, which **exceeds the recommended maximum** of 0.03 mg/kg. - Higher doses can cause **severe adverse effects** including hypertension, arrhythmias, decreased myocardial function, and compromised coronary perfusion. - Not recommended as the standard initial dose. *0.03-0.05 ml/kg in 1:1,000* - The 1:1,000 concentration (1 mg/mL) is **too concentrated for IV use** in neonates [1]. - This volume would deliver 0.03-0.05 mg/kg from a highly concentrated solution, increasing risk of **severe cardiovascular complications**. - The 1:1,000 solution is reserved for **endotracheal administration** (at higher volumes of 0.5-1 mL/kg), not IV route.

Q: Congenital varicella infection causes all except:

Macrocephaly. ***Macrocephaly*** - **Macrocephaly** is generally not a direct consequence of congenital varicella infection; rather, **microcephaly** due to brain damage is more commonly observed. - Congenital varicella typically causes destructive lesions leading to tissue loss, not increased head circumference. *Cortical atrophy* - **Cortical atrophy** results from the destructive effects of the virus on the developing brain, leading to **neuronal loss** and reduced brain volume. - This can manifest as **microcephaly**, an indirect but common finding associated with congenital varicella. *Cicatrix* - **Cicatrix** (zig-zag scarring) is a classic dermatological manifestation of congenital varicella, resulting from the virus's impact on developing skin. - These characteristic **skin lesions** are one of the most identifiable features of the syndrome. *Limb hypoplasia* - **Limb hypoplasia**, involving underdeveloped limbs, is a hallmark feature of congenital varicella, often due to **viral damage** to limb buds and associated neural structures. - This can lead to **bone shortening** and muscle atrophy in affected limbs.

Q: Prophylactic dose of vitamin K given to new born infants at delivery is?

1mg. ***1mg*** - The standard prophylactic dose of **intramuscular (IM) vitamin K** given to newborns at delivery is **1mg**. - This dose is effective in preventing **Vitamin K Deficiency Bleeding (VKDB)**, also known as hemorrhagic disease of the newborn. *5mg* - A 5mg dose of vitamin K is typically reserved for older children or adults with confirmed **vitamin K deficiency** or certain bleeding disorders. - This dose is generally not given prophylactically to healthy newborns due to the risk of potential adverse effects and it being excessive for prophylaxis. *10mg* - A 10mg dose of vitamin K is significantly higher than the recommended prophylactic dose for newborns and is not routinely administered. - Such a high dose could potentially lead to **hemolysis** or other adverse reactions in neonates. *15mg* - A 15mg dose of vitamin K is far beyond the appropriate prophylactic dose for newborns and is not used in this context. - Administering such a large dose would pose significant risks and is unnecessary for preventing **VKDB**.

Q: What is the venous hematocrit level at which you will diagnose polycythemia in a newborn?

65%. ***Correct: 65%*** - **Polycythemia** in a newborn is typically diagnosed when the **venous hematocrit** is **≥65%**. - This threshold indicates an abnormally high concentration of **red blood cells**, increasing blood viscosity. *Incorrect: 55%* - A venous hematocrit of 55% is generally considered within the **normal range** for a newborn, especially within the first few hours of life. - It does not meet the criteria for diagnosing **polycythemia**. *Incorrect: 60%* - While 60% is elevated compared to adult norms, it is still generally within the higher end of the **normal range** for an infant. - This level alone is usually **not sufficient** to diagnose **polycythemia** or warrant intervention without other clinical signs. *Incorrect: 70%* - A venous hematocrit of 70% definitely indicates **polycythemia** and significant **hyperviscosity**. - However, the diagnostic threshold for polycythemia is **65%**, meaning the condition is identified earlier.

Q: What will be the appropriate management for a very low birth weight preterm baby who is on a ventilator for respiratory distress and presents with clinical features of necrotizing enterocolitis with perforation?

Peritoneal drainage. ***Peritoneal drainage for perforated necrotizing enterocolitis*** - **Peritoneal drainage** is preferred in **critically ill, very low birth weight preterm infants** with perforated NEC as an initial stabilizing measure. - This minimally invasive procedure involves inserting a drain to remove contaminated fluid, which can improve the baby's condition enough to hopefully allow for definitive surgical repair later. *Conservative management for perforated necrotizing enterocolitis* - **Conservative management** is generally reserved for **early-stage NEC without perforation** as perforation indicates a surgical emergency. - Delaying surgical intervention in the presence of perforation can lead to **sepsis, multiple organ failure, and death**. *Immediate laparotomy for perforated necrotizing enterocolitis* - While definitive, **immediate laparotomy** carries high risks for **extremely premature and unstable infants** due to challenges with anesthesia, fluid balance, and temperature regulation. - Often, babies are too unstable for a major surgery, and **peritoneal drainage** is used to stabilize them first. *ECMO with surgery after stabilization for perforated necrotizing enterocolitis* - **ECMO (extracorporeal membrane oxygenation)** is a life support measure for **severe respiratory or cardiac failure**, not primarily for perforated NEC. - While it can support very sick infants, it's a highly invasive procedure with its own complications and doesn't directly address the surgical emergency of perforation.

Q: Which of the following is best for the transport of a newborn, ensuring maintenance of a warm temperature?

Portable temperature-controlled device. **Portable temperature-controlled device** ✓ - A **portable temperature-controlled device**, such as an infant transport incubator, is specifically designed to maintain a stable and warm environment for newborns during transfer - These devices offer precise **thermoregulation**, protection from environmental factors, and allow for continuous monitoring and interventions during transport - This is the **gold standard** for neonatal transport, ensuring optimal temperature maintenance *Skin-to-skin contact method* - While excellent for immediate bonding and initial warmth in stable newborns, **skin-to-skin contact** cannot consistently maintain optimal temperature during prolonged or inter-facility transport - It requires constant close contact with a caregiver and limits medical interventions during transport - Not suitable for sick or unstable newborns requiring monitoring *Insulated thermal box* - An **insulated thermal box** offers passive warmth retention but lacks active temperature control and monitoring - Cannot prevent heat loss effectively over extended periods or compensate for fluctuations in external temperature - No provision for medical interventions during transport *Heated water container* - A **heated water container** is not a standard or safe method for maintaining newborn temperature during transport - Carries significant risks of burns, inconsistent warming, and potential for rapid cooling once the heat source diminishes - Unsafe and not recommended for neonatal care

Q: Infants of diabetic mothers manifest all of the following conditions except?

Hyperglycemia. ***Hyperglycemia*** - Infants of diabetic mothers are typically exposed to high glucose levels in utero, leading to **fetal hyperinsulinemia** and subsequent **neonatal hypoglycemia** after birth when the maternal glucose supply is removed. - Therefore, **neonatal hyperglycemia** is rarely seen in these infants unless due to other specific causes like sepsis or iatrogenic glucose overload. *Hypoglycemia* - The elevated maternal glucose levels stimulate the fetal pancreas to produce excess insulin, leading to **fetal hyperinsulinemia**. - After birth, when the continuous high glucose supply is abruptly stopped, the infant's still-hyperactive pancreas continues to secrete high levels of insulin, causing a rapid drop in blood glucose, leading to **hypoglycemia**. *Hypocalcemia* - Infants of diabetic mothers are prone to **hypocalcemia**, likely due to hypoparathyroidism, hypomagnesemia, and/or increased calcitonin levels. - This typically occurs within the first 24-72 hours of life and can manifest with jitteriness, tremors, or seizures. *Hyperbilirubinemia* - These infants are at increased risk for **hyperbilirubinemia** due to several contributing factors including polycythemia (leading to increased red cell breakdown), prematurity, and hepatic immaturity. - The increased red blood cell mass from polycythemia (a common complication) leads to a higher bilirubin load for the immature liver to process.

Q: A 30-year-old pregnant female presented to the obstetrics OPD for the first time in the third trimester, at 36 weeks of gestation. She complained of fever, swollen lymph nodes, sore throat, and a characteristic rash on the palms as well as the soles of the feet. A serological screening test conducted in the given plate was positive for syphilis. Which of the following abnormalities can most likely be found in the child?

Hutchinson teeth. ***Hutchinson teeth*** - The mother's symptoms (fever, swollen lymph nodes, sore throat, rash on palms and soles) and positive serology are highly suggestive of **secondary syphilis**. Since she presented in the third trimester without prior care, the fetus was likely exposed before adequate treatment, increasing the risk of **congenital syphilis**. - **Hutchinson teeth**, characterized by peg-shaped, notched, and widely spaced permanent incisors, are a classic sign of **late congenital syphilis**. *Chorioretinitis* - **Chorioretinitis** is a common manifestation of **congenital toxoplasmosis** and **CMV infection**. - Although syphilis can affect the eyes (e.g., interstitial keratitis), chorioretinitis is not its most characteristic ocular finding. *Microcephaly* - **Microcephaly** is typically associated with congenital infections like **Zika virus**, **CMV**, and **toxoplasmosis**. - While syphilis can cause neurodevelopmental issues, microcephaly is not a primary or characteristic feature. *Calcifications* - **Intracranial calcifications** are a hallmark of **congenital CMV infection** and **toxoplasmosis**. - Though syphilis can affect the central nervous system, **calcifications** are not a typical brain abnormality seen in congenital syphilis.

Question 1

What is the threshold for hyperglycemia in neonates?

Accepted Answer

150 mg/dl

Answer

180 mg/dl

Answer

100 mg/dl

Answer

125 mg/dl

Question 2

Which of the following is a common symptom of neonatal lupus?

Accepted Answer

Cutaneous lesion

Answer

All of the options

Answer

Thrombocytopenia

Answer

Heart block

Question 3

What is the correct dose of i.v. adrenaline in term infants during neonatal resuscitation?

Accepted Answer

0.1-0.3 ml/kg in 1:10,000

Answer

0.03-0.05 ml/kg in 1:1,000

Answer

0.01-0.03 ml/kg in 1:1,000

Answer

0.3-0.5 ml/kg in 1:10,000

Question 4

Congenital varicella infection causes all except:

Accepted Answer

Macrocephaly

Answer

Cortical atrophy

Answer

Cicatrix

Answer

Limb hypoplasia

Question 5

Prophylactic dose of vitamin K given to new born infants at delivery is?

Accepted Answer

1mg

Answer

5mg

Answer

10mg

Answer

15mg

Question 6

What is the venous hematocrit level at which you will diagnose polycythemia in a newborn?

Accepted Answer

65%

Answer

55%

Answer

60%

Answer

70%

Question 7

What will be the appropriate management for a very low birth weight preterm baby who is on a ventilator for respiratory distress and presents with clinical features of necrotizing enterocolitis with perforation?

Accepted Answer

Peritoneal drainage

Answer

Conservative management

Answer

Immediate laparotomy

Answer

ECMO with surgery after stabilization

Question 8

Which of the following is best for the transport of a newborn, ensuring maintenance of a warm temperature?

Accepted Answer

Portable temperature-controlled device

Answer

Skin-to-skin contact method

Answer

Heated water container

Answer

Insulated thermal box

Question 9

Infants of diabetic mothers manifest all of the following conditions except?

Accepted Answer

Hyperglycemia

Answer

Hypocalcemia

Answer

Hyperbilirubinemia

Answer

Hypoglycemia

Question 10

A 30-year-old pregnant female presented to the obstetrics OPD for the first time in the third trimester, at 36 weeks of gestation. She complained of fever, swollen lymph nodes, sore throat, and a characteristic rash on the palms as well as the soles of the feet. A serological screening test conducted in the given plate was positive for syphilis. Which of the following abnormalities can most likely be found in the child?

Accepted Answer

Hutchinson teeth

Answer

Chorioretinitis

Answer

Microcephaly

Answer

Calcifications

Neonatology — MCQs

Neonatology — MCQs

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