Question 1: A premature neonate develops metabolic bone disease of prematurity. Which supplementation is most important?

• Vitamin C and copper
• Vitamin A and zinc
• Calcium and phosphorus (Correct answer)
• Iron and folate

Correct answer: Calcium and phosphorus

Premature infants miss the third-trimester fetal bone mineralization phase, requiring supplemental calcium and phosphorus to support bone development.

Question 2: Which vitamin K-dependent clotting factors are deficient in hemorrhagic disease of the newborn (HDN)?

• Factors VIII, IX, XI, and XII
• Factors I, II, III, IV
• Factors II, VII, IX, and X (Correct answer)
• Factors V, VIII, and von Willebrand factor

Correct answer: Factors II, VII, IX, and X

Vitamin K-dependent clotting factors are II (prothrombin), VII, IX, and X; deficiency due to inadequate vitamin K at birth leads to HDN, which is prevented by prophylactic vitamin K administration.

Question 3: A preterm infant has persistently low blood pressure. Which condition should be ruled out before initiating vasopressors?

• Adrenal insufficiency (especially after antenatal steroids) (Correct answer)
• Hyperglycemia
• Hyperbilirubinemia
• Polycythemia

Correct answer: Adrenal insufficiency (especially after antenatal steroids)

Adrenal insufficiency in premature or steroid-exposed neonates can cause refractory hypotension that responds to hydrocortisone rather than vasopressors.

Question 4: Which factor is the strongest predictor of IVH in premature neonates?

• Gestational age above 34 weeks
• Lower gestational age and birth weight (Correct answer)
• Female sex
• Cesarean delivery

Correct answer: Lower gestational age and birth weight

IVH risk is inversely related to gestational age and birth weight; extremely premature infants have the most fragile germinal matrix vasculature.

Question 5: Which scoring tool is most commonly used to assess neonatal opioid withdrawal syndrome (NOWS) severity?

• Modified Sarnat score
• Ballard Maturity Score
• Thompson Score
• Finnegan Neonatal Abstinence Scoring Tool (Correct answer)

Correct answer: Finnegan Neonatal Abstinence Scoring Tool

The Finnegan score assesses 21 signs of neonatal abstinence across CNS, autonomic, and GI categories to guide pharmacologic treatment decisions.

Question 6: Which intervention has been shown to reduce the incidence and severity of IVH in premature neonates?

• Immediate delivery room intubation
• Antenatal corticosteroids administered to the mother (Correct answer)
• Routine lumbar puncture
• High-dose vitamin E

Correct answer: Antenatal corticosteroids administered to the mother

Antenatal corticosteroids accelerate fetal brain maturation and vascular stability, significantly reducing the incidence and severity of IVH in premature infants.

Question 7: What is the primary mechanism by which prostaglandin E1 (PGE1) helps a ductal-dependent lesion?

• Increases systemic vascular resistance
• Closes the ductus arteriosus
• Reduces pulmonary blood flow
• Maintains or reopens the ductus arteriosus (Correct answer)

Correct answer: Maintains or reopens the ductus arteriosus

PGE1 prevents closure of the ductus arteriosus, maintaining pulmonary or systemic blood flow in ductal-dependent congenital heart defects.

Question 8: What is the most important pharmacokinetic difference in neonates compared to adults when dosing medications?

• Smaller volume of distribution and rapid renal clearance
• Larger volume of distribution, lower protein binding, and immature renal/hepatic clearance (Correct answer)
• Faster hepatic metabolism
• Higher albumin concentrations

Correct answer: Larger volume of distribution, lower protein binding, and immature renal/hepatic clearance

Neonates have higher body water content (larger Vd), lower protein binding (more free drug), and immature organ clearance, requiring dose and interval adjustments.

Question 9: When a newborn is born with developing lung tissue that is not attached to the airways, this condition is known as:

• Congenital cystic adenomatoid malformation
• Congenital diaphragmatic hernia
• Pleural effusion
• Bronchopulmonary sequestration (Correct answer)

Correct answer: Bronchopulmonary sequestration

Bronchopulmonary sequestration is a rare congenital malformation where a portion of lung tissue develops abnormally and is not connected to the normal bronchial tree or pulmonary circulation. Instead, it receives its blood supply from a systemic artery. This unattached, non-functional lung tissue can be intralobar (within the normal lung) or extralobar (separate from the normal lung).

Question 10: Which of the following best describes the mechanism by which hypothermia therapy reduces brain injury after hypoxic-ischemic encephalopathy (HIE)?

• Eliminates seizure activity by reducing cortical excitability
• Prevents cerebral edema by inducing osmotic diuresis
• Directly reverses neuronal ischemia by restoring ATP production
• Suppresses glutamate-mediated excitotoxicity and apoptotic cascades in the latent phase (Correct answer)

Correct answer: Suppresses glutamate-mediated excitotoxicity and apoptotic cascades in the latent phase

Cooling interrupts the secondary energy failure phase by suppressing glutamate release, apoptotic signaling, and free radical production.

Question 11: Which drug is first-line for pharmacologic treatment of apnea of prematurity?

• Theophylline
• Doxapram
• Caffeine citrate (Correct answer)
• Aminophylline

Correct answer: Caffeine citrate

Caffeine citrate is the preferred first-line methylxanthine for apnea of prematurity due to its superior safety profile and once-daily dosing.

Question 12: A preterm infant at 28 weeks gestation presents with apnea of prematurity. Which mechanism best explains this condition?

• Hypercalcemia depressing the respiratory drive
• Premature closure of the ductus arteriosus
• Excessive surfactant production causing airway collapse
• Immature respiratory center with decreased response to CO2 (Correct answer)

Correct answer: Immature respiratory center with decreased response to CO2

Apnea of prematurity results from an immature brainstem respiratory center with blunted chemoreceptor response to CO2.

Question 13: A 36-week infant has a serum calcium of 6.2 mg/dL with jitteriness and prolonged QTc on EKG. The immediate treatment is:

• IV 10% calcium gluconate infused slowly over 10–15 minutes with cardiac monitoring (Correct answer)
• Magnesium sulfate IV push
• Oral calcium carbonate supplementation
• Furosemide to correct the electrolyte imbalance

Correct answer: IV 10% calcium gluconate infused slowly over 10–15 minutes with cardiac monitoring

Symptomatic hypocalcemia with EKG changes requires slow IV calcium gluconate with continuous cardiac monitoring to avoid bradycardia.

Question 14: A neonate with supraventricular tachycardia (SVT) at a rate of 280 bpm and hemodynamic instability requires:

• Adenosine IV push as initial treatment
• Immediate synchronized cardioversion (Correct answer)
• Digoxin loading
• Oral propranolol

Correct answer: Immediate synchronized cardioversion

Hemodynamically unstable SVT requires immediate synchronized cardioversion; adenosine is used for stable SVT.

Question 15: A term neonate has a serum bilirubin of 22 mg/dL at 48 hours of life. Direct Coombs test is positive. Which condition is most likely?

• Breast milk jaundice
• Gilbert syndrome
• ABO incompatibility (Correct answer)
• Physiologic jaundice

Correct answer: ABO incompatibility

A positive direct Coombs test indicates maternal antibodies coating neonatal red blood cells, most commonly due to ABO incompatibility.

Question 16: A neonate is being evaluated for exchange transfusion. Which of the following is an absolute indication for emergency exchange transfusion?

• TSB at phototherapy threshold on the Bhutani nomogram
• Signs of acute bilirubin encephalopathy (ABE) with rapidly rising TSB (Correct answer)
• TSB 2 mg/dL above the phototherapy line in a term infant
• Positive direct Coombs test with TSB of 10 mg/dL at 48 hours

Correct answer: Signs of acute bilirubin encephalopathy (ABE) with rapidly rising TSB

Signs of acute bilirubin encephalopathy (lethargy, hypotonia, high-pitched cry, arching) with a rapidly rising TSB are an absolute indication for emergency double-volume exchange transfusion.

Question 17: Which developmental care strategy has the strongest evidence for improving neurodevelopmental outcomes in preterm infants in the NICU?

• Continuous background white noise to simulate intrauterine environment
• Limiting parental visitation to reduce infection risk
• Strict 4-hour clustered care with total sensory isolation between cares
• Family integrated care with kangaroo mother care and developmental positioning (Correct answer)

Correct answer: Family integrated care with kangaroo mother care and developmental positioning

Kangaroo care and family-integrated developmental care have robust evidence for improving brain development, reducing stress hormones, and enhancing neurobehavioral outcomes.

Question 18: A neonate with early-onset GBS sepsis. After 48 hours of ampicillin and gentamicin with confirmed GBS sensitivity, gentamicin should be:

• Replaced with cefazolin
• Discontinued and ampicillin continued alone as narrower-spectrum therapy (Correct answer)
• Switched to vancomycin
• Continued for the full course

Correct answer: Discontinued and ampicillin continued alone as narrower-spectrum therapy

Once GBS is confirmed as the pathogen and sensitivity verified, treatment can be narrowed to ampicillin alone, reducing nephrotoxicity risk from aminoglycosides.

Question 19: Kangaroo care (skin-to-skin holding) in the NICU has been shown to provide which benefit?

• Increase infection risk
• Delay weight gain
• Increase oxygen requirements
• Stabilize temperature, heart rate, and improve breastfeeding outcomes (Correct answer)

Correct answer: Stabilize temperature, heart rate, and improve breastfeeding outcomes

Kangaroo care stabilizes neonatal temperature, heart rate, and respiratory rate, promotes breastfeeding, and improves neurodevelopmental and bonding outcomes.

Question 20: During a difficult resuscitation, the team leader notices escalating tension. Which communication technique best maintains team performance?

• Closed-loop communication with role clarity and directed task assignment (Correct answer)
• Limiting verbal updates to reduce distraction
• Allowing the most experienced member to work uninterrupted
• Assigning tasks alphabetically by team member name

Correct answer: Closed-loop communication with role clarity and directed task assignment

Closed-loop communication with clear role assignments prevents errors of omission and maintains situational awareness during high-stress neonatal resuscitation.

Question 21: Total parenteral nutrition (TPN) in neonates typically starts with which amino acid concentration to promote anabolism?

• 1 g/kg/day increasing slowly
• 0.5 g/kg/day
• 5 g/kg/day from birth
• 3-4 g/kg/day starting on day 1 (Correct answer)

Correct answer: 3-4 g/kg/day starting on day 1

Current evidence supports early, aggressive protein provision of 3-4 g/kg/day from day 1 to promote positive nitrogen balance and prevent catabolism in preterm neonates.

Question 22: What is the blood glucose threshold below which treatment is recommended for a symptomatic neonate in the US per AAP guidelines?

• 50 mg/dL (Correct answer)
• 40 mg/dL
• 30 mg/dL
• 60 mg/dL

Correct answer: 50 mg/dL

Per AAP guidelines, symptomatic neonates with blood glucose <50 mg/dL should receive IV dextrose, while asymptomatic thresholds vary by age in the first 24-48 hours.

Question 23: Hydrogen ions and Potassium.

• Pkd
• Aldosterone excretes (Correct answer)
• Alkalosis
• Distal convoluted tubule secrete

Correct answer: Aldosterone excretes

Aldosterone is a hormone produced by the adrenal glands that plays a crucial role in regulating electrolyte balance and blood pressure. It acts on the distal convoluted tubules and collecting ducts of the kidneys, promoting the reabsorption of sodium and water while simultaneously stimulating the excretion of potassium and hydrogen ions. This action helps maintain the body's acid-base balance and fluid volume.

Question 24: Which complication is MOST commonly associated with exchange transfusion in neonates?

• Thrombocytopenia and metabolic acidosis (Correct answer)
• Hypercalcemia
• Polycythemia
• Hypermagnesemia

Correct answer: Thrombocytopenia and metabolic acidosis

Exchange transfusion commonly causes thrombocytopenia (platelet dilution), metabolic acidosis (citrate in donor blood), as well as hypocalcemia, hypoglycemia, and electrolyte disturbances.

Question 25: A neonate at 32 weeks corrected age is noted to have absent end-diastolic flow on umbilical artery Doppler. Which management is most appropriate?

• Immediate cesarean delivery regardless of fetal status
• Initiate antenatal corticosteroids and consider delivery timing based on full clinical picture (Correct answer)
• Begin oral nifedipine for maternal blood pressure management
• Increase maternal IV fluid rate and reassess in 24 hours

Correct answer: Initiate antenatal corticosteroids and consider delivery timing based on full clinical picture

Absent end-diastolic flow indicates severe uteroplacental insufficiency; management includes steroids for lung maturity and individualized delivery timing.

Question 26: A premature infant in the NICU benefits most from which developmental care principle to reduce stress?

• Bright overhead lighting 24 hours a day
• Clustering care activities and providing containment/nesting (Correct answer)
• Frequent bathing and stimulation
• Continuous auditory stimulation

Correct answer: Clustering care activities and providing containment/nesting

Clustering care reduces the frequency of disturbing the infant, while containment/nesting provides proprioceptive boundaries that mimic the womb and reduce stress.

Question 27: What is the correct PEEP range typically used for a neonate with RDS on conventional ventilation?

• 10-15 cm H2O
• 1-2 cm H2O
• 4-6 cm H2O (Correct answer)
• 0-1 cm H2O

Correct answer: 4-6 cm H2O

A PEEP of 4-6 cm H2O maintains functional residual capacity and prevents alveolar collapse between breaths in neonates with RDS.

Question 28: Which ventilator parameter is most directly adjusted to correct hypercapnia in a ventilated neonate?

• Tidal volume or respiratory rate (Correct answer)
• Flow rate
• PEEP
• FiO2

Correct answer: Tidal volume or respiratory rate

Increasing tidal volume or respiratory rate increases minute ventilation, which removes more CO2 and corrects hypercapnia.

Question 29: Which retinopathy of prematurity (ROP) finding requires treatment within 72 hours to prevent retinal detachment?

• Zone III Stage 1 without plus disease
• Zone II Stage 2 without plus disease
• Regressing ROP at any zone
• Type 1 ROP: Zone I any stage with plus disease, or Zone II Stage 3 with plus disease (Correct answer)

Correct answer: Type 1 ROP: Zone I any stage with plus disease, or Zone II Stage 3 with plus disease

Type 1 ROP is the threshold for urgent treatment with laser photocoagulation or anti-VEGF therapy to prevent progression to detachment.

Question 30: Necrotizing enterocolitis (NEC) is most common in which neonatal population?

• Large for gestational age (LGA) infants
• Premature infants, especially those <32 weeks or <1500g (Correct answer)
• Term infants born by cesarean section
• Post-term infants with meconium aspiration

Correct answer: Premature infants, especially those <32 weeks or <1500g

NEC primarily affects premature infants with immature gut immunity, motility, and mucosal barrier function, with greatest risk in those <32 weeks or <1500g.

Question 31: What is the primary risk associated with chloramphenicol use in neonates?

• Nephrotoxicity
• Gray baby syndrome due to immature hepatic metabolism (Correct answer)
• Kernicterus
• Ototoxicity

Correct answer: Gray baby syndrome due to immature hepatic metabolism

Gray baby syndrome occurs because neonates lack adequate hepatic glucuronyl transferase to metabolize chloramphenicol, leading to toxic accumulation causing cardiovascular collapse.

Question 32: Which antifungal is most commonly used for invasive candidiasis in premature neonates?

• Nystatin oral
• Itraconazole
• Fluconazole IV (Correct answer)
• Caspofungin

Correct answer: Fluconazole IV

Fluconazole IV is the first-line treatment for invasive neonatal candidiasis due to its established safety profile and good CNS penetration.

Question 33: Which enzyme deficiency causes phenylketonuria (PKU), detected on newborn screening?

• Medium-chain acyl-CoA dehydrogenase
• Galactose-1-phosphate uridyltransferase
• Glucose-6-phosphate dehydrogenase
• Phenylalanine hydroxylase (Correct answer)

Correct answer: Phenylalanine hydroxylase

PKU results from deficiency of phenylalanine hydroxylase, causing toxic phenylalanine accumulation that damages the developing brain if not detected and treated early.

Question 34: Which coagulation profile is most consistent with Disseminated Intravascular Coagulation (DIC) in a neonate?

• Normal PT, isolated elevated aPTT, normal platelets
• Low PT, normal aPTT, high fibrinogen, elevated platelets
• Elevated PT, normal aPTT, normal fibrinogen, normal platelets
• Elevated PT, elevated aPTT, low fibrinogen, low platelets, elevated D-dimers (Correct answer)

Correct answer: Elevated PT, elevated aPTT, low fibrinogen, low platelets, elevated D-dimers

DIC is characterized by consumption of clotting factors and platelets, resulting in elevated PT, elevated aPTT, low fibrinogen, thrombocytopenia, and elevated D-dimers from fibrinolysis.

Question 35: Which antibiotic combination is the standard empiric therapy for early-onset neonatal sepsis in the US?

• Ampicillin and gentamicin (Correct answer)
• Vancomycin and gentamicin
• Piperacillin-tazobactam and clindamycin
• Cefotaxime and metronidazole

Correct answer: Ampicillin and gentamicin

Ampicillin and gentamicin provide coverage for the most common early-onset sepsis pathogens (GBS and gram-negative organisms including Listeria).

Question 36: Furosemide is used in neonates with fluid overload. What electrolyte abnormality must be monitored closely?

• Hypernatremia
• Hyperphosphatemia
• Hypokalemia and hypocalcemia (Correct answer)
• Hyperkalemia

Correct answer: Hypokalemia and hypocalcemia

Furosemide causes renal loss of potassium and calcium, predisposing neonates to hypokalemia, hypocalcemia, and nephrocalcinosis with prolonged use.

Question 37: >1.5 mg/dL or increase >0.2 mg/dL/day

• Hfov parameters decrease co2
• Ino age usage
• Avg gfr for preterm <34 weeks
• Creatinine dysfunction level (Correct answer)

Correct answer: Creatinine dysfunction level

The specified creatinine levels (>1.5 mg/dL or an increase >0.2 mg/dL/day) are commonly used diagnostic criteria for acute kidney injury (AKI) or renal dysfunction. Creatinine is a waste product filtered by the kidneys, and elevated levels indicate that the kidneys are not functioning effectively. These thresholds are particularly relevant in neonates, where kidney function is still maturing.

Question 38: A neonate born at 36 weeks develops hypoglycemia. After three 15-minute dextrose gel treatments fail to normalize glucose, the next best step is:

• Administer glucagon 0.03 mg/kg IM
• Initiate IV dextrose infusion at 4-6 mg/kg/min (Correct answer)
• Begin corticosteroid therapy
• Increase dextrose gel concentration to 40%

Correct answer: Initiate IV dextrose infusion at 4-6 mg/kg/min

IV dextrose infusion is indicated when oral/buccal dextrose gel fails to correct persistent hypoglycemia in a neonate.

Question 39: At what gestational age does fetal hemoglobin (HbF) begin to be replaced by adult hemoglobin (HbA)?

• 20–24 weeks gestation
• 28–32 weeks gestation
• 32–34 weeks gestation
• After 34–36 weeks gestation (Correct answer)

Correct answer: After 34–36 weeks gestation

The switch from HbF to HbA production begins at approximately 34–36 weeks gestation and continues postnatally over the first 6 months of life.

Question 40: Which four-extremity blood pressure finding is most consistent with coarctation of the aorta?

• Low blood pressure in all extremities
• Higher blood pressure in lower extremities than upper extremities
• Equal pressures in all four limbs
• Higher blood pressure in upper extremities than lower extremities by >10 mmHg (Correct answer)

Correct answer: Higher blood pressure in upper extremities than lower extremities by >10 mmHg

Coarctation of the aorta causes upper extremity hypertension and reduced perfusion pressure in the lower extremities, creating a measurable gradient.

Question 41: High-frequency oscillatory ventilation (HFOV) is preferred in which neonatal condition?

• Simple apnea of prematurity
• Mild TTN
• Pulmonary interstitial emphysema (PIE) (Correct answer)
• Feeding intolerance

Correct answer: Pulmonary interstitial emphysema (PIE)

HFOV is preferred in PIE because its small tidal volumes and high frequency minimize further barotrauma while maintaining gas exchange.

Question 42: Which finding on cranial ultrasound in a preterm infant indicates the highest risk for long-term neurodevelopmental impairment?

• Mild choroid plexus cysts
• Grade IV IVH with periventricular hemorrhagic infarction (Correct answer)
• Grade I IVH confined to the germinal matrix
• Grade II IVH without ventricular dilation

Correct answer: Grade IV IVH with periventricular hemorrhagic infarction

Grade IV IVH with periventricular hemorrhagic infarction (PVHI) carries the highest risk of cerebral palsy and severe cognitive impairment.

Question 43: A neonate receiving IV lipid infusion develops a triglyceride level of 350 mg/dL. What is the appropriate action?

• Switch to a different lipid formulation immediately
• Reduce or hold the lipid infusion until levels normalize (Correct answer)
• Add heparin to the lipid solution
• Continue at the same rate

Correct answer: Reduce or hold the lipid infusion until levels normalize

Hypertriglyceridemia indicates impaired lipid clearance; reducing or holding the lipid infusion prevents complications such as lipemia retinae and coagulopathy.

Question 44: Galactosemia, if untreated, can lead to which life-threatening complication in the newborn period?

• Renal failure
• Cardiac arrhythmias
• Adrenal crisis
• Liver failure, sepsis (especially E. coli), and hypoglycemia (Correct answer)

Correct answer: Liver failure, sepsis (especially E. coli), and hypoglycemia

Untreated galactosemia causes hepatocellular damage, coagulopathy, hypoglycemia, and predisposes to E. coli sepsis, which can be rapidly fatal.

Question 45: As a result of another disorder that reduces calcium levels, the parathyroid gland produces excessive amounts of PTH. <br> <br> Etiology: Severe Ca or Vit D deficiency, CKD

• Parkinsons cardinal features
• Secondary hyperparathyroidism etiology (Correct answer)
• crpytorchidism
• BV common complaint and Tx

Correct answer: Secondary hyperparathyroidism etiology

Secondary hyperparathyroidism occurs when the parathyroid glands produce excessive amounts of parathyroid hormone (PTH) in response to a chronic condition that causes persistent low calcium levels. The description accurately identifies this condition, stating it results from another disorder that reduces calcium levels, and lists common etiologies such as severe calcium or vitamin D deficiency and chronic kidney disease (CKD).

Question 46: Which condition is associated with elevated DIRECT (conjugated) bilirubin in a neonate and requires further workup for cholestasis?

• ABO incompatibility
• Rh hemolytic disease
• Physiologic jaundice
• Biliary atresia (Correct answer)

Correct answer: Biliary atresia

Biliary atresia causes elevation of conjugated (direct) bilirubin due to obstruction of bile flow and requires urgent evaluation (hepatobiliary scan, liver biopsy) and Kasai portoenterostomy before 60 days of life.

Question 47: What is the primary goal of surfactant replacement therapy in premature neonates?

• Increase airway resistance
• Decrease alveolar surface tension to prevent collapse (Correct answer)
• Promote bronchospasm
• Reduce lung compliance

Correct answer: Decrease alveolar surface tension to prevent collapse

Surfactant reduces alveolar surface tension, preventing alveolar collapse and improving lung compliance in premature infants.

Question 48: Batter Syndrome, Pyloric Stenosis, Cystic Fibrosis, and Correction of Chronic Respiratory Acidosis. Answer: Metabolic Alkalosis Causes

• TRUE (Correct answer)
• FALSE

Correct answer: TRUE

The statement is TRUE because all listed conditions can indeed lead to metabolic alkalosis. Bartter syndrome causes renal salt wasting and subsequent alkalosis, pyloric stenosis results in loss of gastric acid through vomiting, and cystic fibrosis can lead to electrolyte imbalances contributing to alkalosis. Additionally, the correction of chronic respiratory acidosis can cause a post-hypercapnic metabolic alkalosis as the kidneys excrete less bicarbonate.

Question 49: A neonate with congenital hypothyroidism requires levothyroxine therapy. What is the main reason for urgent treatment?

• Prevent growth hormone deficiency
• Treat neonatal jaundice
• Prevent cardiac arrhythmias
• Prevent irreversible neurodevelopmental impairment (Correct answer)

Correct answer: Prevent irreversible neurodevelopmental impairment

Early thyroid hormone replacement is critical because thyroid hormone is essential for brain maturation; untreated hypothyroidism causes permanent intellectual disability.

Question 50: Congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency causes a salt-wasting crisis in neonates due to deficiency of:

• Testosterone
• Cortisol only
• Aldosterone and cortisol (Correct answer)
• Estrogen

Correct answer: Aldosterone and cortisol

21-hydroxylase deficiency impairs synthesis of both aldosterone and cortisol, causing sodium wasting, hyperkalemia, and adrenal crisis in affected neonates.

Question 51: Which of the following is the most appropriate intervention for a neonate with a confirmed choanal atresia causing respiratory distress?

• Immediate surfactant administration
• Place an oral airway and prepare for surgical repair (Correct answer)
• Begin high-flow nasal cannula
• Administer epinephrine

Correct answer: Place an oral airway and prepare for surgical repair

Choanal atresia causes respiratory distress because neonates are obligate nasal breathers; an oral airway bypasses the obstruction until surgical repair.

Question 52: Which echocardiographic finding is characteristic of total anomalous pulmonary venous return (TAPVR) with obstruction?

• Severe pulmonary hypertension with right heart enlargement and small left heart (Correct answer)
• Dilated coronary arteries
• Large left-to-right shunt at the atrial level
• Small right ventricle with left ventricular hypertrophy

Correct answer: Severe pulmonary hypertension with right heart enlargement and small left heart

Obstructed TAPVR causes pulmonary venous obstruction, severe pulmonary hypertension, right heart dilation, and a small left heart due to decreased pulmonary venous return.

Question 53: A VLBW neonate has a serum sodium of 128 mEq/L on day 3 of life with urine output of 6 mL/kg/hr. What is the most likely cause?

• Syndrome of inappropriate ADH (SIADH)
• Excessive free water administration (dilutional hyponatremia) (Correct answer)
• Salt-wasting nephropathy
• Pseudohyponatremia from hyperglycemia

Correct answer: Excessive free water administration (dilutional hyponatremia)

Excess free water (hypotonic fluids) in premature neonates with high insensible losses creates dilutional hyponatremia; urine output reflects appropriate fluid response.

Question 54: A preterm infant at 26 weeks has a serum potassium of 7.2 mEq/L on day 1 of life with a peaked T wave on EKG. The initial pharmacologic intervention is:

• IV calcium gluconate to stabilize the cardiac membrane (Correct answer)
• Kayexalate retention enema
• Furosemide to promote renal potassium excretion
• IV sodium bicarbonate only

Correct answer: IV calcium gluconate to stabilize the cardiac membrane

Calcium gluconate is given first in hyperkalemia with EKG changes to immediately stabilize the myocardial membrane and prevent fatal arrhythmia.

Question 55: A neonate with hypoplastic left heart syndrome (HLHS) becomes critically ill when the ductus closes. The primary reason is:

• The ductus was providing the only source of systemic blood flow (Correct answer)
• Closing the ductus reduces right heart preload
• The ductus was providing pulmonary blood flow
• The ductus was delivering oxygenated blood to the brain

Correct answer: The ductus was providing the only source of systemic blood flow

In HLHS, the underdeveloped left heart cannot support systemic circulation, so the ductus arteriosus provides the only route for oxygenated blood to reach the body.

Question 56: A 3-day-old term infant presents with temperature instability, poor feeding, and a WBC of 3,200 cells/µL with an I:T ratio of 0.28. Which diagnosis should be treated empirically?

• Polycythemia
• Transient neonatal thrombocytopenia
• Early-onset neonatal sepsis (Correct answer)
• Physiologic leukopenia

Correct answer: Early-onset neonatal sepsis

An elevated immature-to-total neutrophil ratio (>0.2) combined with clinical signs warrants empiric antibiotic treatment for early-onset sepsis.

Question 57: A preterm infant on CPAP has a sudden desaturation with decreased breath sounds on the right. What is the priority action?

• Increase CPAP pressure
• Administer surfactant
• Obtain chest X-ray and prepare for needle decompression (Correct answer)
• Increase FiO2

Correct answer: Obtain chest X-ray and prepare for needle decompression

Sudden unilateral desaturation with absent breath sounds suggests pneumothorax, requiring urgent chest X-ray and possible needle decompression.

Question 58: A neonate presents with prolonged aPTT, normal PT, normal platelet count, and a history of a circumcision bleed. Which diagnosis is MOST likely?

• Hemophilia A (Factor VIII deficiency) (Correct answer)
• Bernard-Soulier syndrome
• Disseminated intravascular coagulation
• Vitamin K deficiency bleeding

Correct answer: Hemophilia A (Factor VIII deficiency)

Hemophilia A (Factor VIII deficiency) causes an isolated prolonged aPTT with a normal PT and platelet count because Factor VIII is part of the intrinsic pathway only; it is X-linked and presents with bleeding after procedures.

Question 59: Which of the following is the least accurate statement on the sensory capacities of a full-term newborn?

• Newborns prefer black-and-white patterns.
• The newborn has the ability to discriminate among distinctive odors
• At term, the healthy newborn does not yet have an ability to fix on and track objects visually (Correct answer)
• Newborns have acute hearing and are able to localize sound in the environment

Correct answer: At term, the healthy newborn does not yet have an ability to fix on and track objects visually

This statement is inaccurate because full-term newborns are indeed capable of fixing their gaze on objects, especially faces, and can track moving objects. While their vision is not fully developed, they possess these basic visual tracking abilities from birth. They typically prefer high-contrast patterns and can focus on objects within an optimal range of about 8-12 inches.

Question 60: Which electrolyte abnormality is most expected in a VLBW infant with a large patent ductus arteriosus (PDA) treated with indomethacin?

• Hyperkalemia due to cell lysis
• Hyponatremia due to fluid retention (Correct answer)
• Hypercalcemia due to bone resorption
• Hypernatremia due to free water loss

Correct answer: Hyponatremia due to fluid retention

Indomethacin causes renal vasoconstriction, reducing GFR and urine output, which leads to fluid retention and dilutional hyponatremia.

Question 61: Which finding on neonatal MRI is most predictive of adverse neurodevelopmental outcomes after HIE?

• Isolated periventricular white matter signal change
• Small germinal matrix cysts
• Basal ganglia and thalamic injury on diffusion-weighted imaging (Correct answer)
• Mild cortical edema only

Correct answer: Basal ganglia and thalamic injury on diffusion-weighted imaging

Basal ganglia and thalamic injury on MRI in HIE is strongly predictive of motor and cognitive impairment, particularly cerebral palsy.

Question 62: Which enzyme is responsible for converting heme to biliverdin in the catabolism of hemoglobin?

• UDP-glucuronosyltransferase
• Glutathione peroxidase
• Biliverdin reductase
• Heme oxygenase (Correct answer)

Correct answer: Heme oxygenase

Heme oxygenase cleaves the heme ring to produce biliverdin, carbon monoxide, and free iron, which is the first step in bilirubin production.

Question 63: Frequent blood tests were performed on a baby to check his electrolyte and glucose levels. Despite the fact that the newborn is not acutely hypoxemic, this phlebotomy has resulted in anemia of prematurity (AOP). The first course of action is

• Recombinant human erythropoietin (rHuEPO) (Correct answer)
• Fresh frozen platelets (FFP)
• Platelets

Correct answer: Recombinant human erythropoietin (rHuEPO)

Anemia of prematurity (AOP) is common in preterm infants due to factors like frequent blood draws and insufficient erythropoietin production. Recombinant human erythropoietin (rHuEPO) is the primary pharmacological intervention for AOP because it stimulates the bone marrow to produce red blood cells. This helps to correct the anemia by enhancing the body's own erythropoiesis.

Question 64: The following action should be taken if a patient's membranes burst and meconium-tinted amniotic fluid is discovered.

• Fetal scalp blood sampling
• Cesarean
• Increased fetal monitoring (Correct answer)

Correct answer: Increased fetal monitoring

Meconium-tinted amniotic fluid can indicate fetal stress or hypoxia, which increases the risk of meconium aspiration syndrome. The primary action is to increase fetal monitoring to closely assess the fetal heart rate pattern for signs of distress. This allows for timely intervention if the fetal condition deteriorates, ensuring the well-being of the fetus.

Question 65: A neonate of a diabetic mother is at increased risk for hypoglycemia primarily because of:

• Placental glucose deprivation
• Low glycogen stores from preterm birth
• Fetal hyperinsulinism from chronic fetal hyperglycemia (Correct answer)
• Decreased glucagon response at birth

Correct answer: Fetal hyperinsulinism from chronic fetal hyperglycemia

Maternal hyperglycemia causes fetal hyperglycemia, leading to pancreatic beta cell hyperplasia and hyperinsulinism, causing hypoglycemia after birth when maternal glucose supply stops.

Question 66: Which drug is most appropriate for a neonate in septic shock unresponsive to fluid resuscitation?

• Milrinone
• Adenosine
• Digoxin
• Dopamine or norepinephrine (Correct answer)

Correct answer: Dopamine or norepinephrine

Vasopressors such as dopamine or norepinephrine are used to restore vascular tone and cardiac output in neonatal septic shock refractory to fluid.

Question 67: Indomethacin is used to close a hemodynamically significant PDA. What is an important contraindication to its use?

• Necrotizing enterocolitis or compromised renal function (Correct answer)
• Mild thrombocytopenia (platelets 120,000)
• Hyperbilirubinemia
• Mild anemia

Correct answer: Necrotizing enterocolitis or compromised renal function

Indomethacin reduces renal and mesenteric blood flow via prostaglandin inhibition, making NEC and renal impairment contraindications to its use.

Question 68: Periventricular leukomalacia (PVL) is associated with which long-term outcome?

• Retinopathy of prematurity
• Congenital heart disease
• Spastic diplegia and cerebral palsy (Correct answer)
• Congenital deafness

Correct answer: Spastic diplegia and cerebral palsy

PVL involves white matter injury adjacent to the lateral ventricles, disrupting descending motor tracts and predisposing to spastic diplegia and cerebral palsy.

Question 69: Which oxygen saturation target range is recommended for preterm infants less than 35 weeks gestation in the US?

• 98-100%
• 91-95% (Correct answer)
• 80-85%
• 85-89%

Correct answer: 91-95%

The recommended SpO2 target for preterm infants <35 weeks is 91-95% to balance risks of retinopathy of prematurity and hypoxic injury.

Question 70: Which of the following terms describes the use of drugs to try to stop labor?

• Mediation
• Medical catheterization
• Tocolysis (Correct answer)
• Tolerable medication

Correct answer: Tocolysis

Tocolysis is the medical term for the use of medications, known as tocolytics, to suppress uterine contractions and inhibit preterm labor. These drugs are administered to delay birth, allowing time for fetal lung maturation or transfer to a facility with a higher level of neonatal care. This intervention aims to improve neonatal outcomes by prolonging gestation.

Question 71: What is the most appropriate initial fluid for treating severe hypernatremia (sodium >165 mEq/L) in a neonate?

• Hypotonic fluid with gradual sodium correction over 48-72 hours (Correct answer)
• Normal saline (0.9% NaCl) bolus
• Free water bolus to rapidly lower sodium
• 5% dextrose water bolus

Correct answer: Hypotonic fluid with gradual sodium correction over 48-72 hours

Rapid sodium correction in hypernatremia risks cerebral edema; gradual correction with hypotonic fluids at a rate of <0.5 mEq/L/hr reduces this risk.

Question 72: Which condition is characterized by a persistent right-to-left shunt through the ductus arteriosus and foramen ovale in a term neonate?

• Persistent pulmonary hypertension of the newborn (PPHN) (Correct answer)
• Apnea of prematurity
• Respiratory distress syndrome
• Bronchopulmonary dysplasia

Correct answer: Persistent pulmonary hypertension of the newborn (PPHN)

PPHN involves elevated pulmonary vascular resistance causing right-to-left shunting through fetal channels, bypassing the lungs.

Question 73: A term infant presents with bilious vomiting on day 2 of life. The most urgent next step is:

• Upper GI series to evaluate for malrotation with midgut volvulus (Correct answer)
• Rectal biopsy to rule out Hirschsprung disease
• Abdominal ultrasound to assess for pyloric stenosis
• Trial of feeding thickener and positional management

Correct answer: Upper GI series to evaluate for malrotation with midgut volvulus

Bilious vomiting in a neonate must be considered malrotation with midgut volvulus until proven otherwise, as delay can result in catastrophic intestinal loss.

Question 74: A term neonate develops jaundice at 18 hours of age. Which of the following is the MOST likely cause?

• Breast milk jaundice
• Crigler-Najjar syndrome type II
• ABO incompatibility hemolytic disease (Correct answer)
• Physiologic jaundice

Correct answer: ABO incompatibility hemolytic disease

Jaundice appearing within the first 24 hours of life is pathologic and most commonly caused by hemolytic disease such as ABO incompatibility.

Question 75: What is the recommended dose of epinephrine for neonatal cardiac resuscitation via endotracheal tube per NRP guidelines?

• 0.5 mg/kg IV
• 0.001 mg/kg IV
• 0.05-0.1 mg/kg ET (Correct answer)
• 0.01-0.03 mg/kg IV

Correct answer: 0.05-0.1 mg/kg ET

When IV access is unavailable, NRP recommends 0.05-0.1 mg/kg epinephrine via ET tube, though IV/IO administration is preferred for reliability.

Question 76: Which medication requires careful monitoring of serum drug levels due to its narrow therapeutic index in neonates?

• Vancomycin (Correct answer)
• Iron supplementation
• Folic acid
• Vitamin D

Correct answer: Vancomycin

Vancomycin has a narrow therapeutic index and variable pharmacokinetics in neonates; levels must be monitored to avoid nephrotoxicity and ensure efficacy.

Question 77: A 30-week infant on mechanical ventilation develops sudden deterioration with decreased breath sounds on the left and shift of the cardiac impulse to the right. The priority intervention is:

• Emergent needle thoracentesis at the second intercostal space midclavicular line (Correct answer)
• Increase PEEP by 2 cm H2O
• Obtain a stat chest X-ray before any intervention
• Administer adenosine IV

Correct answer: Emergent needle thoracentesis at the second intercostal space midclavicular line

Sudden deterioration with unilateral decreased breath sounds and cardiac shift indicates tension pneumothorax requiring immediate needle decompression.

Question 78: A term neonate has a central hematocrit of 68% at 12 hours of age and is asymptomatic. What is the MOST appropriate management?

• Increased oral feeding and repeat hematocrit in 4–6 hours
• Immediate partial exchange transfusion with normal saline
• Phlebotomy without volume replacement
• Partial exchange transfusion only if symptomatic or hematocrit ≥65% with symptoms (Correct answer)

Correct answer: Partial exchange transfusion only if symptomatic or hematocrit ≥65% with symptoms

Partial exchange transfusion is recommended for neonatal polycythemia only when symptomatic (respiratory distress, hypoglycemia, jitteriness) or when the hematocrit exceeds 65–70% with clinical concerns; asymptomatic infants can be monitored.

Question 79: Which finding on blood gas is most consistent with respiratory acidosis in a neonate?

• pH 7.50, PaCO2 28 mmHg
• pH 7.45, PaCO2 38 mmHg
• pH 7.20, PaCO2 65 mmHg (Correct answer)
• pH 7.35, PaCO2 40 mmHg

Correct answer: pH 7.20, PaCO2 65 mmHg

Respiratory acidosis is characterized by a low pH combined with elevated PaCO2, reflecting inadequate ventilation.

Question 80: Neonatal early-onset sepsis (72 hours) typically manifests as

• Bacteremia
• Pneumonia (Correct answer)
• Meningitis

Correct answer: Pneumonia

Early-onset neonatal sepsis, typically occurring within the first 72 hours of life, is most commonly acquired vertically from the mother during birth. The most frequent clinical manifestation of early-onset sepsis is pneumonia, often presenting with respiratory distress. While bacteremia is present and meningitis can occur, pneumonia is considered the typical and most common presentation.

Question 81: Nonnutritive sucking (NNS) during tube feeding in premature infants is beneficial because it:

• Increases gastric acid production
• Prevents necrotizing enterocolitis directly
• Promotes GI maturation, weight gain, and oral feeding transition (Correct answer)
• Reduces need for parenteral nutrition immediately

Correct answer: Promotes GI maturation, weight gain, and oral feeding transition

NNS stimulates GI hormones, promotes suck-swallow coordination, and is associated with faster transition to full oral feeding and improved weight gain.

Question 82: A 2-week-old former 28-weeker develops abdominal distension, bloody stools, and pneumatosis intestinalis on X-ray. The antibiotic regimen of choice for confirmed necrotizing enterocolitis is:

• Oral metronidazole only
• Ceftriaxone and azithromycin
• Vancomycin and piperacillin-tazobactam alone
• Ampicillin, gentamicin, and metronidazole (or clindamycin) (Correct answer)

Correct answer: Ampicillin, gentamicin, and metronidazole (or clindamycin)

NEC treatment requires broad-spectrum coverage for gram-positive, gram-negative, and anaerobic organisms with ampicillin, gentamicin, and metronidazole.

Question 83: Vitamin K is routinely administered to neonates at birth to prevent:

• Hemolytic disease of the newborn
• Hyperbilirubinemia
• Sepsis
• Hemorrhagic disease of the newborn (HDN) (Correct answer)

Correct answer: Hemorrhagic disease of the newborn (HDN)

Neonates have low vitamin K stores and lack gut flora to produce it, predisposing them to bleeding; prophylactic vitamin K prevents HDN.

Question 84: A term neonate with meconium aspiration syndrome (MAS) fails to improve on conventional ventilation. The ventilator strategy most likely to improve oxygenation while minimizing volutrauma is:

• High-frequency oscillatory ventilation (HFOV) with lung recruitment strategy (Correct answer)
• Transitioning to nasal CPAP at 8 cm H2O
• Reducing FiO2 to 40% to avoid oxygen toxicity
• Increasing conventional rate to 80 breaths/min with low PEEP

Correct answer: High-frequency oscillatory ventilation (HFOV) with lung recruitment strategy

HFOV provides consistent mean airway pressure for lung recruitment while delivering very small tidal volumes, reducing volutrauma in MAS.

Question 85: Inhaled nitric oxide (iNO) is used in neonates primarily to:

• Treat bronchopulmonary dysplasia directly
• Decrease cardiac output
• Selectively dilate pulmonary vasculature (Correct answer)
• Increase systemic blood pressure

Correct answer: Selectively dilate pulmonary vasculature

iNO selectively dilates pulmonary vasculature without systemic effects, reducing pulmonary hypertension and improving oxygenation.

Question 86: What hematocrit threshold typically triggers packed red blood cell (pRBC) transfusion in a clinically stable preterm neonate on minimal respiratory support?

• Hematocrit < 25% with symptoms or < 21% if asymptomatic (Correct answer)
• Hematocrit < 30% regardless of symptoms
• Hematocrit < 35%
• Hematocrit < 40%

Correct answer: Hematocrit < 25% with symptoms or < 21% if asymptomatic

Current evidence-based guidelines suggest transfusion thresholds of approximately Hct < 25% with symptoms of anemia or Hct < 21% in stable, asymptomatic preterm neonates on minimal support.

Question 87: Which of the following is the MOST common cause of anemia in a preterm neonate in the first week of life?

• Twin-to-twin transfusion syndrome
• Hereditary spherocytosis
• Iatrogenic blood loss from phlebotomy (Correct answer)
• Hemolytic disease of the newborn

Correct answer: Iatrogenic blood loss from phlebotomy

Iatrogenic anemia from repeated phlebotomy for laboratory testing is the most common cause of anemia in preterm neonates in the NICU, often exceeding the neonate's total blood volume over a hospital stay.

Question 88: An osteogenesis imperfecta (OI) type 1 diagnosis is made at delivery for a term newborn. Before bringing their child home, parents should be given the following information.

• Correct methods for feeding to prevent aspiration
• Close monitoring for breathing problems common to this defect
• Correct methods of handling, bathing, and placing their child in the crib (Correct answer)

Correct answer: Correct methods of handling, bathing, and placing their child in the crib

Osteogenesis imperfecta (OI) type 1 is a genetic disorder characterized by fragile bones that break easily. The most crucial information for parents before discharge is education on safe handling techniques to prevent fractures. This includes demonstrating proper methods for holding, bathing, diapering, and positioning the infant to minimize stress on their fragile bones and reduce the risk of injury.

Question 89: Which type of blood product is MOST appropriate for exchange transfusion in a neonate with Rh hemolytic disease?

• O-positive washed packed red blood cells
• Leukoreduced type-specific whole blood less than 7 days old
• Type-specific irradiated packed red blood cells reconstituted with fresh frozen plasma
• O-negative irradiated CMV-negative red blood cells reconstituted with AB plasma (Correct answer)

Correct answer: O-negative irradiated CMV-negative red blood cells reconstituted with AB plasma

O-negative (Rh-negative) irradiated CMV-negative red blood cells reconstituted with AB plasma avoids further hemolysis from maternal anti-D antibodies and is safe for all neonates regardless of blood type.

Question 90: Which of the following maternal blood types places a neonate at highest risk for significant ABO hemolytic disease?

• Type B mother with type O infant
• Type AB mother with type A infant
• Type O mother with type A or B infant (Correct answer)
• Type A mother with type B infant

Correct answer: Type O mother with type A or B infant

Type O mothers have naturally occurring anti-A and anti-B IgG antibodies that can cross the placenta and cause hemolysis in type A or B infants.

Question 91: When initiating total parenteral nutrition (TPN) in a VLBW infant, which amino acid intake on day 1 best supports positive nitrogen balance?

• 1.0 g/kg/day
• 0.5 g/kg/day
• 5.0 g/kg/day
• 3.5 g/kg/day (Correct answer)

Correct answer: 3.5 g/kg/day

Early aggressive amino acid intake of 3–4 g/kg/day from day 1 promotes positive nitrogen balance and reduces catabolism in VLBW infants.

Question 92: A neonate has an abnormal head ultrasound showing bilateral periventricular echogenicity. What follow-up imaging is recommended?

• PET scan of the brain
• Serial head ultrasound and MRI at term-corrected age (Correct answer)
• EEG only
• CT scan of the head without contrast

Correct answer: Serial head ultrasound and MRI at term-corrected age

Serial head ultrasound monitors lesion evolution, and MRI at term-corrected age provides definitive assessment of white matter injury extent and neurodevelopmental prognosis.

Question 93: Which neonatal seizure type is most commonly missed because it lacks classic convulsive movements?

• Clonic seizures
• Subtle seizures (lip smacking, eye deviation, bicycling movements) (Correct answer)
• Myoclonic seizures
• Tonic seizures

Correct answer: Subtle seizures (lip smacking, eye deviation, bicycling movements)

Subtle seizures manifest as lip smacking, eye deviation, bicycling of the legs, or apnea and are easily missed without continuous EEG monitoring.

Question 94: Neonatal hypoxia resulted in neurological impairment and mild hypoxic ischemic encephalopathy (HIE). The method of treatment LESS likely to be used for this ailment is

• Phenobarbital
• Therapeutic hypothermia
• Fluid resuscitation (Correct answer)

Correct answer: Fluid resuscitation

Therapeutic hypothermia is a standard treatment for moderate to severe HIE to reduce brain injury, and phenobarbital may be used to manage seizures. Fluid resuscitation, while essential for general neonatal care, is not a specific treatment for the neurological impairment or HIE itself. In fact, excessive fluids can potentially worsen cerebral edema in HIE, making it less likely to be a primary treatment for the neurological aspect.

Question 95: Which carbohydrate is the primary energy source in human breast milk and most neonatal formulas?

• Maltodextrin
• Lactose (Correct answer)
• Fructose
• Sucrose

Correct answer: Lactose

Lactose is the primary carbohydrate in human milk and most standard infant formulas, providing approximately 40% of total caloric intake.

Question 96: A term neonate has differential cyanosis (pink upper body, blue lower body). Which defect is most likely?

• Coarctation of the aorta
• Hypoplastic left heart syndrome
• Transposition of the great arteries with PDA (Correct answer)
• Total anomalous pulmonary venous return

Correct answer: Transposition of the great arteries with PDA

TGA with a right-to-left ductal shunt causes unoxygenated blood to flow to the lower body while oxygenated blood perfuses the upper body.

Question 97: What is the recommended caloric intake to support adequate growth in a stable premature neonate?

• 150-180 kcal/kg/day
• 80-100 kcal/kg/day
• 110-130 kcal/kg/day (Correct answer)
• 60-80 kcal/kg/day

Correct answer: 110-130 kcal/kg/day

Stable premature neonates require 110-130 kcal/kg/day to achieve intrauterine growth rates of approximately 15-20 g/kg/day.

Question 98: Neonatal hypocalcemia is defined as a total serum calcium below which threshold in term neonates?

• 8 mg/dL (Correct answer)
• 10 mg/dL
• 12 mg/dL
• 6 mg/dL

Correct answer: 8 mg/dL

Neonatal hypocalcemia in term infants is defined as total serum calcium <8 mg/dL (or ionized calcium <1.0 mmol/L), requiring evaluation and possible supplementation.

Question 99: A neonate presents with jitteriness and irritability at 24 hours of age. Mother has a history of opioid use disorder. What condition is most likely?

• Neonatal meningitis
• Neonatal opioid withdrawal syndrome (NOWS) (Correct answer)
• Hypocalcemia
• Hypoglycemia

Correct answer: Neonatal opioid withdrawal syndrome (NOWS)

NOWS (formerly NAS) presents with jitteriness, irritability, high-pitched cry, and feeding difficulties in infants exposed to opioids in utero.

Question 100: A neonate has neonatal abstinence syndrome (NAS) with a Finnegan score consistently above 8. After maximizing non-pharmacologic interventions, which first-line pharmacologic treatment is recommended?

• Oral morphine or methadone titrated to symptom control (Correct answer)
• Phenobarbital as the sole agent
• Clonidine as monotherapy
• IV lorazepam for acute agitation episodes

Correct answer: Oral morphine or methadone titrated to symptom control

Opioid replacement with oral morphine or methadone is first-line pharmacotherapy for NAS due to opioid exposure, targeting the underlying receptor withdrawal.

Question 101: A 28-week preterm neonate has a bilirubin level of 8 mg/dL on day 3. Which factor MOST lowers the threshold for phototherapy in this infant compared to a term neonate?

• Greater skin surface area per kilogram
• Higher hematocrit leading to more bilirubin production
• Immature hepatic glucuronidation only
• Increased risk of bilirubin neurotoxicity at lower TSB levels due to prematurity and low albumin (Correct answer)

Correct answer: Increased risk of bilirubin neurotoxicity at lower TSB levels due to prematurity and low albumin

Preterm infants are at higher risk for bilirubin neurotoxicity at lower TSB levels due to immature blood-brain barrier, lower albumin levels (less bilirubin binding), and concurrent illness, warranting lower phototherapy thresholds.

Question 102: When calculating maintenance IV fluid requirements for a VLBW infant on day of life 1, which factor most significantly increases insensible water losses?

• Phototherapy and radiant warmer use (Correct answer)
• Continuous pulse oximetry
• Nasogastric tube feedings
• Prone positioning

Correct answer: Phototherapy and radiant warmer use

Radiant warmers and phototherapy significantly increase insensible water losses through evaporation and radiation, sometimes doubling baseline requirements.

Question 103: A murmur heard at the left upper sternal border in a premature infant, with a bounding pulse and widened pulse pressure, most likely represents:

• Pulmonary stenosis
• Ventricular septal defect
• Patent ductus arteriosus (PDA) (Correct answer)
• Atrial septal defect

Correct answer: Patent ductus arteriosus (PDA)

A PDA produces a continuous machinery murmur at the left upper sternal border with bounding pulses and wide pulse pressure due to left-to-right shunting.

Question 104: Therapeutic hypothermia (whole-body cooling) for HIE is initiated within what time window to be effective?

• Anytime in the first 72 hours
• Within 24 hours of birth
• Within 12 hours of birth
• Within 6 hours of birth (Correct answer)

Correct answer: Within 6 hours of birth

Therapeutic hypothermia must be initiated within 6 hours of birth to interrupt the secondary energy failure phase and reduce neuronal death.

Question 105: Which congenital heart defect presents with a 'boot-shaped' heart on chest X-ray and cyanosis?

• Tetralogy of Fallot (Correct answer)
• Patent ductus arteriosus
• Transposition of the great arteries
• Ventricular septal defect

Correct answer: Tetralogy of Fallot

Tetralogy of Fallot causes right ventricular hypertrophy and decreased pulmonary flow, producing a classic boot-shaped heart on CXR and cyanosis.

Question 106: What does a pre-ductal SpO2 greater than post-ductal SpO2 by more than 10% indicate in a neonate?

• Right-to-left ductal shunting consistent with PPHN (Correct answer)
• Normal transitional circulation
• Patent ductus arteriosus with left-to-right shunt
• Peripheral vascular disease

Correct answer: Right-to-left ductal shunting consistent with PPHN

A significant pre-to-post-ductal SpO2 gradient indicates right-to-left shunting through the ductus arteriosus, consistent with PPHN.

Question 107: Which neonatal cardiac finding requires emergent balloon atrial septostomy (Rashkind procedure)?

• Patent ductus arteriosus
• Transposition of the great arteries with intact atrial septum (Correct answer)
• Tetralogy of Fallot
• Ventricular septal defect

Correct answer: Transposition of the great arteries with intact atrial septum

In TGA with an intact atrial septum, blood cannot mix adequately; atrial septostomy creates an atrial communication to allow oxygenated blood to reach the systemic circulation.

Question 108: A nurse whose practice closely matches that of a doctor is known as a nurse practitioner. They must get advanced degrees, such as a Ph.D. in nursing or a master's degree in nursing. While some states permit nurse practitioners to work autonomously, others demand that they do so under a doctor's supervision. They are employed by medical practices, hospitals, community health centers, educational institutions, and home health care companies.

• Nurse Practitioner (NP's) (Correct answer)
• Tasks And skills
• Work schedule
• Education

Correct answer: Nurse Practitioner (NP's)

The provided text offers a comprehensive description of a Nurse Practitioner (NP), detailing their role, advanced educational requirements (Ph.D. or Master's in nursing), varying degrees of autonomy across states, and typical employment settings. This information collectively defines the profession of a Nurse Practitioner. The other options represent specific facets rather than the overarching definition.

Question 109: Intraventricular hemorrhage (IVH) is most commonly graded using which system in neonates?

• Papile grading system (Grades I-IV) (Correct answer)
• FLACC scale
• Neonatal Neurological Risk Score
• Glasgow Coma Scale

Correct answer: Papile grading system (Grades I-IV)

The Papile grading system classifies IVH from Grade I (subependymal only) to Grade IV (parenchymal involvement), guiding prognosis and management.

Question 110: A neonate receiving CPAP has a sudden increase in FiO2 requirement and bradycardia. The nurse notes muffled heart sounds. What should be suspected?

• Pulmonary hemorrhage
• Sepsis
• Metabolic acidosis
• Tension pneumothorax (Correct answer)

Correct answer: Tension pneumothorax

Muffled heart sounds, sudden oxygen deterioration, and bradycardia in a CPAP patient are classic signs of tension pneumothorax requiring emergent decompression.

Question 111: Which of the following conditions in newborns can be brought on by deposits of unconjugated bilirubin?

• Cyanosis
• Jaundice (Correct answer)
• Sepsis
• Bruising

Correct answer: Jaundice

Unconjugated bilirubin is a yellow pigment produced from the breakdown of red blood cells. When it accumulates in the blood and deposits in the skin and mucous membranes, it causes jaundice, characterized by a yellowish discoloration. High levels of unconjugated bilirubin can be toxic to the brain (kernicterus) if not managed.

Question 112: A term neonate has persistent tachypnea, grunting, and a chest X-ray showing fluid in the fissures. What is the most likely diagnosis?

• Respiratory distress syndrome
• Pneumothorax
• Transient tachypnea of the newborn (Correct answer)
• Meconium aspiration syndrome

Correct answer: Transient tachypnea of the newborn

Transient tachypnea of the newborn (TTN) classically presents with fluid in the interlobar fissures on CXR in term or late-preterm infants.

Question 113: A 3-week-old infant presents with fever, bulging fontanelle, and CSF findings of glucose 25 mg/dL, protein 320 mg/dL, and 480 WBC with 90% PMNs. The most likely causative organism is:

• Escherichia coli
• Staphylococcus epidermidis
• Group B Streptococcus (GBS) (Correct answer)
• Listeria monocytogenes

Correct answer: Group B Streptococcus (GBS)

Group B Streptococcus is the most common cause of late-onset neonatal meningitis (7–90 days), followed by E. coli.

Question 114: A neonate has an arterial blood gas showing pH 7.15, PaCO2 40, HCO3 14. What drug treatment addresses the underlying metabolic cause?

• Dexamethasone
• Sodium bicarbonate (cautiously for severe metabolic acidosis) (Correct answer)
• Furosemide
• Caffeine

Correct answer: Sodium bicarbonate (cautiously for severe metabolic acidosis)

Sodium bicarbonate may be used cautiously for severe, documented metabolic acidosis after ensuring adequate ventilation, as CO2 is normal in this case.

Question 115: A neonate develops hypoglycemia despite feeding. Diazoxide is started. What is its mechanism of action?

• Inhibits insulin secretion by opening ATP-sensitive potassium channels (Correct answer)
• Increases glucagon release
• Blocks gluconeogenesis
• Stimulates insulin secretion from pancreatic beta cells

Correct answer: Inhibits insulin secretion by opening ATP-sensitive potassium channels

Diazoxide opens K-ATP channels in pancreatic beta cells, hyperpolarizing the membrane and inhibiting insulin secretion to treat hyperinsulinemic hypoglycemia.

Question 116: A 3-day-old breastfed neonate has a total serum bilirubin (TSB) of 18 mg/dL. The mother reports the infant is nursing 8–10 times per day with adequate wet diapers. What is the MOST appropriate next step?

• Begin phototherapy based on hour-specific nomogram (Correct answer)
• Perform exchange transfusion immediately
• Obtain a direct Coombs test only and observe
• Discontinue breastfeeding and start formula

Correct answer: Begin phototherapy based on hour-specific nomogram

Management of neonatal hyperbilirubinemia should be guided by the AAP hour-specific nomogram, which determines phototherapy thresholds based on age in hours and risk factors.

Question 117: Which sign is indicative of congestive heart failure (CHF) in a neonate?

• Hypertension and bradypnea
• Tachycardia, hepatomegaly, and poor feeding (Correct answer)
• Bradycardia and hypertension
• Bradycardia and wide pulse pressure

Correct answer: Tachycardia, hepatomegaly, and poor feeding

Neonatal CHF presents with tachycardia, hepatomegaly (from venous congestion), poor feeding, and failure to thrive rather than peripheral edema.

Question 118: A neonate with suspected cardiac tamponade will most likely show which triad of findings?

• Cyanosis, grunting, and chest retractions
• Beck's triad: hypotension, muffled heart sounds, and distended neck veins (Correct answer)
• Tachycardia, hypertension, and bounding pulses
• Bradycardia, high blood pressure, and wide pulse pressure

Correct answer: Beck's triad: hypotension, muffled heart sounds, and distended neck veins

Beck's triad—hypotension, muffled heart sounds, and jugular venous distension—classically describes cardiac tamponade from pericardial fluid accumulation.

Question 119: A neonate on ibuprofen for PDA closure develops oliguria and rising creatinine. What is the most appropriate next step?

• Increase the ibuprofen dose
• Add indomethacin
• Initiate peritoneal dialysis immediately
• Hold ibuprofen and reassess renal function (Correct answer)

Correct answer: Hold ibuprofen and reassess renal function

Ibuprofen-induced renal impairment requires holding the medication and reassessing kidney function before considering further doses or alternatives.

Question 120: Which of the following chromosomal diseases is marked by health issues such as heart disease, developmental delays, and learning disabilities?

• Turner syndrome
• Klinefelter syndrome
• Down syndrome
• Williams syndrome

Down syndrome (Trisomy 21) is a chromosomal disorder caused by the presence of an extra copy of chromosome 21. Individuals with Down syndrome commonly experience a range of health issues, including congenital heart defects, varying degrees of developmental delays, and intellectual disabilities. They also often have distinct physical characteristics.

Question 121: Which chromosomal abnormality is most commonly associated with duodenal atresia in the newborn?

• Trisomy 21 (Down syndrome) (Correct answer)
• Trisomy 18 (Edwards syndrome)
• Trisomy 13 (Patau syndrome)
• Turner syndrome (45,X)

Correct answer: Trisomy 21 (Down syndrome)

Approximately 30% of duodenal atresia cases are associated with Trisomy 21, making it the most common chromosomal association.

Question 122: Phenobarbital is used in neonatal seizures. What is an important side effect to monitor?

• Respiratory depression, sedation, and hypotension (Correct answer)
• Hyperthermia
• Hyperglycemia
• Tachycardia

Correct answer: Respiratory depression, sedation, and hypotension

Phenobarbital can cause respiratory depression, sedation, and hypotension in neonates, requiring close monitoring of vital signs and respiratory status.

Question 123: Which reflex in a neonate is assessed by stroking the lateral aspect of the foot from heel to toe?

• Stepping reflex
• Moro reflex
• Babinski (plantar) reflex (Correct answer)
• Palmar grasp reflex

Correct answer: Babinski (plantar) reflex

The Babinski reflex is elicited by stroking the lateral sole; normal neonates show dorsiflexion of the big toe and fanning of the other toes.

Question 124: Due to the father's recent diagnosis of Huntington's disease, the parents of a newborn are thinking about genetic testing for their kid. They seek advice from the NP. The best course of action is

• “Testing the infant now may help relieve your anxiety, but will not change the outcome.”
• “The information can’t be used for health purposes now, and your child may want to make this decision himself when he is older.” (Correct answer)
• “Testing is available for individuals older than ten years of age.”

Correct answer: “The information can’t be used for health purposes now, and your child may want to make this decision himself when he is older.”

Huntington's disease is an adult-onset disorder with no current cure or preventative treatment. Genetic testing for a child for an adult-onset condition that has no immediate medical benefit raises ethical concerns about the child's autonomy and potential psychological impact. It is generally recommended to defer such testing until the child is old enough to understand the implications and make their own informed decision.

Question 125: The pistol is an electromagnetically operated device that activates both inspiration and expiration.

• PSV
• HFOV (Correct answer)
• APRV
• HFJV

Correct answer: HFOV

High-Frequency Oscillatory Ventilation (HFOV) utilizes a piston or diaphragm, often referred to as a 'pistol,' to generate rapid, small tidal volumes. Unlike conventional ventilators, HFOV actively drives both inspiration and expiration. This unique mechanism allows for very high respiratory rates and low tidal volumes, providing gentle ventilation and minimizing lung injury.

Question 126: When counseling parents about the expected developmental trajectory of their 25-week infant at hospital discharge, which statement reflects evidence-based prognostic guidance?

• Outcomes vary widely; most infants benefit from early intervention therapies with individualized follow-up (Correct answer)
• Developmental outcomes are fully predictable from the neonatal brain MRI at term equivalent age
• Most 25-week infants will have no significant neurodevelopmental impairment by school age
• Severe cognitive impairment affects all infants born at 25 weeks gestation

Correct answer: Outcomes vary widely; most infants benefit from early intervention therapies with individualized follow-up

Outcomes at 25 weeks are highly variable; early intervention services improve outcomes, and individualized, honest counseling respects family autonomy.

Question 127: When assessing pain in a non-verbal ventilated neonate, which validated tool is most appropriate?

• Wong-Baker FACES Scale
• Neonatal Infant Pain Scale (NIPS) or PIPP (Correct answer)
• Visual Analog Scale (VAS)
• Numeric Rating Scale

Correct answer: Neonatal Infant Pain Scale (NIPS) or PIPP

NIPS (Neonatal Infant Pain Scale) or PIPP (Premature Infant Pain Profile) assess behavioral and physiologic pain indicators in non-verbal neonates.

Question 128: Morphine is used for analgesia/sedation in ventilated neonates. Which adverse effect requires the most monitoring?

• Respiratory depression and hypotension (Correct answer)
• Increased bowel motility
• Hypertension
• Hyperglycemia

Correct answer: Respiratory depression and hypotension

Morphine causes dose-dependent respiratory depression and hypotension in neonates, requiring careful monitoring of respiratory rate and blood pressure.

Question 129: Which finding on abdominal X-ray is pathognomonic for necrotizing enterocolitis?

• Pneumatosis intestinalis (gas in the bowel wall) (Correct answer)
• Calcified meconium
• Absence of bowel gas
• Dilated bowel loops

Correct answer: Pneumatosis intestinalis (gas in the bowel wall)

Pneumatosis intestinalis—gas produced by bacteria within the bowel wall—is the pathognomonic radiologic sign of NEC.

Question 130: Which reversal agent is used for opioid-induced respiratory depression in a neonate?

• Flumazenil
• Protamine sulfate
• Naloxone (Correct answer)
• Sugammadex

Correct answer: Naloxone

Naloxone is a competitive opioid receptor antagonist used to reverse opioid-induced respiratory depression in neonates.

Question 131: A neonate born via emergency cesarean section for placental abruption presents at 10 minutes of life with pallor, poor perfusion, and a hematocrit of 28%. Which diagnosis should be suspected?

• Rh hemolytic disease of the newborn
• Polycythemia from delayed cord clamping
• Acute fetal-maternal hemorrhage or abruptio placentae causing hypovolemic anemia (Correct answer)
• Disseminated intravascular coagulation (DIC)

Correct answer: Acute fetal-maternal hemorrhage or abruptio placentae causing hypovolemic anemia

Placental abruption can cause acute fetal blood loss into the maternal circulation or retroplacental clot, presenting as hypovolemic shock with pallor, poor perfusion, and low hematocrit at birth.

Question 132: Human breast milk is recommended for premature infants primarily because it provides:

• More calcium and phosphorus than formula
• Better thermoregulation
• Immunologic protection, better gut tolerance, and reduced NEC risk (Correct answer)
• Higher caloric density than formula

Correct answer: Immunologic protection, better gut tolerance, and reduced NEC risk

Breast milk provides secretory IgA, lactoferrin, and oligosaccharides that protect the immature gut, and is associated with significantly lower rates of NEC and sepsis.

Question 133: Which condition is characterized by white matter injury in premature neonates occurring in a watershed distribution?

• Germinal matrix hemorrhage
• Intraventricular hemorrhage (IVH)
• Subependymal hemorrhage
• Periventricular leukomalacia (PVL) (Correct answer)

Correct answer: Periventricular leukomalacia (PVL)

PVL occurs in the arterial border zones around the lateral ventricles, making premature white matter vulnerable to ischemia-reperfusion and excitotoxic injury.

Question 134: An infant's basic metabolic rate and normal body temperature are both maintained within a small range of environmental temperatures known as the

• Incuwarming range
• Incubation range
• Thermal neutral zone
• Radiant-warming zone

The thermal neutral zone (TNZ) is the specific range of environmental temperatures within which a newborn can maintain a stable core body temperature with minimal metabolic rate and oxygen consumption. Outside this zone, the infant must expend energy to either warm up or cool down. This increased metabolic demand can lead to cold stress or hyperthermia, impacting their health.

Question 135: Which chest X-ray finding is classic for respiratory distress syndrome (RDS) in a premature neonate?

• Hyperinflation with flattened diaphragms
• Unilateral consolidation with effusion
• Cardiomegaly with pulmonary edema
• Diffuse ground-glass appearance with air bronchograms (Correct answer)

Correct answer: Diffuse ground-glass appearance with air bronchograms

RDS classically shows a diffuse ground-glass opacity with air bronchograms due to atelectasis from surfactant deficiency.

Question 136: A neonate receiving intensive phototherapy has a TSB that rises by 1 mg/dL in 6 hours despite treatment. What is the MOST appropriate next action?

• Begin intravenous immunoglobulin (IVIG) therapy (Correct answer)
• Increase the neonate's fluid intake by 10% and continue phototherapy
• Discontinue phototherapy and perform exchange transfusion immediately
• Add a second phototherapy unit and reassess in 4–6 hours

Correct answer: Begin intravenous immunoglobulin (IVIG) therapy

IVIG (0.5–1 g/kg) is recommended for isoimmune hemolytic disease (Rh or ABO) when the TSB is rising despite intensive phototherapy, as it reduces hemolysis by blocking Fc receptors on macrophages.

Question 137: A family requests withdrawal of life-sustaining treatment for their 24-week infant after 3 weeks of maximal support with ongoing deterioration. The NNP's ethical priority is to:

• Facilitate a family meeting with the palliative care team to align goals of care with family values (Correct answer)
• Defer the decision entirely to the attending neonatologist
• Document the family's request and take no further action
• Continue current treatment while awaiting ethics committee review

Correct answer: Facilitate a family meeting with the palliative care team to align goals of care with family values

Family-centered palliative care meetings are the ethical standard to ensure informed, values-based decision-making when redirecting care for critically ill neonates.

Question 138: What is the hallmark finding on ECG in a neonate with complete heart block?

• ST elevation in all leads
• Prolonged QT interval
• Short PR interval with delta waves
• P waves that bear no relationship to QRS complexes (Correct answer)

Correct answer: P waves that bear no relationship to QRS complexes

Complete (third-degree) heart block shows P waves and QRS complexes firing independently, with no conduction between atria and ventricles.

Question 139: What volume of blood is used for a double-volume exchange transfusion in a neonate?

• 200 mL/kg
• 40 mL/kg
• 80 mL/kg
• 160 mL/kg (Correct answer)

Correct answer: 160 mL/kg

A double-volume exchange transfusion uses approximately 160 mL/kg (2 × 80 mL/kg blood volume), which exchanges roughly 85–90% of the neonate's red blood cells.

Question 140: Bronchopulmonary dysplasia (BPD) in a premature infant is defined by the need for supplemental oxygen at:

• Term corrected age only
• 28 days of life or 36 weeks postmenstrual age (Correct answer)
• 14 days of life
• 7 days of life

Correct answer: 28 days of life or 36 weeks postmenstrual age

BPD is defined as oxygen requirement at 28 days of life or at 36 weeks postmenstrual age, reflecting chronic lung disease of prematurity.

Question 141: Dopamine at low doses (2-5 mcg/kg/min) primarily acts on which receptors in neonates?

• Cholinergic receptors decreasing heart rate
• Beta-2 adrenergic receptors causing bronchodilation
• Dopaminergic receptors increasing renal and mesenteric perfusion (Correct answer)
• Alpha-1 receptors causing vasoconstriction

Correct answer: Dopaminergic receptors increasing renal and mesenteric perfusion

Low-dose dopamine primarily stimulates dopaminergic receptors, promoting renal and mesenteric vasodilation, though this effect is less reliable in neonates.

Question 142: A neonate has a serum glucose of 300 mg/dL on day 2 of TPN. What is the first step in management?

• Administer glucagon
• Start insulin infusion immediately
• Discontinue TPN entirely
• Reduce the dextrose concentration in TPN and recheck glucose (Correct answer)

Correct answer: Reduce the dextrose concentration in TPN and recheck glucose

Reducing the dextrose concentration is the first step in managing neonatal hyperglycemia on TPN, as the glucose infusion rate may exceed the neonate's utilization capacity.

Question 143: Which of the following is the greatest technique to swiftly remove air from the chest cavity in the case of a baby with pneumothorax symptoms?

• Plastic tube to suction
• Using a needle and syringe (Correct answer)
• Add nitric oxide to oxygen
• Extracorporeal membrane oxygenation

Correct answer: Using a needle and syringe

Needle aspiration using a needle and syringe is the most immediate and life-saving technique for decompressing a tension pneumothorax in a neonate. This procedure rapidly removes trapped air from the chest cavity, alleviating pressure on the heart and lungs. It serves as a crucial bridge to stabilize the infant before a more definitive chest tube insertion can be performed.

Question 144: What is the mechanism of action of phenytoin in treating neonatal seizures?

• Inhibits NMDA receptor activation
• Blocks voltage-gated sodium channels to stabilize neuronal membranes (Correct answer)
• Increases chloride conductance
• Enhances GABA-A receptor activity

Correct answer: Blocks voltage-gated sodium channels to stabilize neuronal membranes

Phenytoin stabilizes neuronal membranes by blocking voltage-gated sodium channels, reducing the frequency and spread of seizure activity.

Question 145: Which of the following best describes physiologic jaundice in a term neonate?

• Onset after 24 hours, peak by day 3–4, resolves by day 14 (Correct answer)
• Onset within 24 hours, peak by day 2
• Onset after 24 hours, persistent beyond 3 weeks
• Onset at day 5–7, associated with breastfeeding difficulty

Correct answer: Onset after 24 hours, peak by day 3–4, resolves by day 14

Physiologic jaundice in term neonates typically appears after 24 hours, peaks on days 3–4, and resolves by day 14, driven by increased bilirubin production and immature conjugation.

Question 146: Which neonatal cardiac lesion is associated with maternal anti-Ro/SSA and anti-La/SSB antibodies?

• Congenital complete heart block (Correct answer)
• Tricuspid atresia
• Transposition of the great arteries
• Tetralogy of Fallot

Correct answer: Congenital complete heart block

Maternal anti-Ro/SSA and anti-La/SSB antibodies cross the placenta and damage the fetal AV node, causing congenital complete heart block.

Question 147: What is the primary mechanism by which phototherapy reduces serum bilirubin levels?

• Enhances hepatic UDP-glucuronosyltransferase activity
• Promotes renal excretion of unconjugated bilirubin
• Increases intestinal motility to reduce enterohepatic circulation
• Converts unconjugated bilirubin to water-soluble photoisomers excreted without conjugation (Correct answer)

Correct answer: Converts unconjugated bilirubin to water-soluble photoisomers excreted without conjugation

Phototherapy converts unconjugated bilirubin in the skin to structural and configurational isomers (lumirubin and photobilirubin) that are water-soluble and can be excreted in bile and urine without hepatic conjugation.

Question 148: In the first 24 hours of life, what is the primary reason insensible water loss is high in extremely premature neonates?

• High respiratory rate causing pulmonary losses
• Thin, poorly keratinized skin with large surface area-to-volume ratio (Correct answer)
• Increased urine output from mature kidneys
• Immature sweat glands overproducing sweat

Correct answer: Thin, poorly keratinized skin with large surface area-to-volume ratio

Extremely premature neonates have thin, minimally keratinized skin with a high surface area-to-weight ratio, resulting in dramatically increased transepidermal water loss.

Question 149: Which medication is first-line for treating morphine-refractory seizures in neonates after phenobarbital failure?

• Carbamazepine
• Lamotrigine
• Levetiracetam or phenytoin/fosphenytoin (Correct answer)
• Valproic acid

Correct answer: Levetiracetam or phenytoin/fosphenytoin

Levetiracetam or phenytoin/fosphenytoin are commonly used second-line agents when phenobarbital fails to control neonatal seizures.

Question 150: Hypoxic-ischemic encephalopathy (HIE) in a term neonate is most accurately assessed using which scoring system?

• Apgar score alone
• Sarnat or Thompson staging of HIE severity (Correct answer)
• CRIB score
• Ballard gestational age score

Correct answer: Sarnat or Thompson staging of HIE severity

Sarnat and Thompson staging systems assess the severity of HIE based on neurological signs, guiding decisions about therapeutic hypothermia.

Question 151: What is the recommended initial FiO2 for resuscitation of a term neonate at birth in the US?

• 21% (Correct answer)
• 100%
• 60%
• 40%

Correct answer: 21%

Current NRP guidelines recommend starting resuscitation of term neonates with room air (21% FiO2) and titrating based on pulse oximetry.

Question 152: Dexamethasone given postnatally for BPD carries a significant risk of:

• Hypoglycemia only
• Neurodevelopmental impairment and GI perforation (Correct answer)
• Anemia
• Pulmonary hemorrhage

Correct answer: Neurodevelopmental impairment and GI perforation

Postnatal dexamethasone for BPD is associated with increased risk of cerebral palsy and gastrointestinal perforation, limiting its use to severe, refractory cases.

Question 153: Meconium aspiration syndrome (MAS) is most likely to occur in which infant?

• Preterm infant with RDS
• Infant of a diabetic mother without fetal distress
• Post-term or term infant with fetal distress (Correct answer)
• 24-week premature infant

Correct answer: Post-term or term infant with fetal distress

MAS occurs when a stressed term or post-term fetus passes meconium in utero and aspirates it, causing chemical pneumonitis and airway obstruction.

Question 154: A term infant is diagnosed with persistent pulmonary hypertension (PPHN). After failing to respond to 100% oxygen, which pharmacologic agent is the first-line treatment?

• Systemic epinephrine
• Inhaled nitric oxide (iNO) (Correct answer)
• IV sildenafil
• Oral bosentan

Correct answer: Inhaled nitric oxide (iNO)

Inhaled nitric oxide is the first-line selective pulmonary vasodilator approved for PPHN in term and near-term infants.

Question 155: A neonate born to a mother with poorly controlled type 1 diabetes has a hematocrit of 72% at 4 hours of life. The infant is asymptomatic. The most appropriate management is:

• Partial exchange transfusion with normal saline (Correct answer)
• Immediate phlebotomy of 10 mL/kg
• IV fluid hydration alone and repeat hematocrit in 4 hours
• Observation only with feeding encouragement

Correct answer: Partial exchange transfusion with normal saline

Symptomatic polycythemia or a hematocrit ≥65-70% with risk factors warrants partial exchange transfusion to reduce hyperviscosity.

Question 156: An infant at 34 weeks gestation has respiratory distress and a chest X-ray showing a ground-glass appearance with air bronchograms. Which surfactant characteristic determines dosing in this scenario?

• Weight-based dosing of 100–200 mg/kg of phospholipid content (Correct answer)
• Dose determined by FiO2 requirement at time of administration
• Fixed dose of 3 mL regardless of weight
• Dosing based on gestational age alone

Correct answer: Weight-based dosing of 100–200 mg/kg of phospholipid content

Surfactant dosing is standardized by weight using phospholipid content (e.g., beractant 100 mg/kg, poractant alfa 200 mg/kg as initial dose).

Question 157: Why is erythromycin eye ointment applied to neonates at birth in the US?

• Prevention of bacterial endophthalmitis
• Treatment of chlamydial conjunctivitis
• Prophylaxis against Neisseria gonorrhoeae ophthalmia neonatorum (Correct answer)
• Prevention of herpes simplex ophthalmia

Correct answer: Prophylaxis against Neisseria gonorrhoeae ophthalmia neonatorum

Erythromycin ointment is applied prophylactically to prevent gonococcal ophthalmia neonatorum, which can cause blindness if untreated.

Question 158: Two weeks after giving birth, a mother brings her term baby—her first child—in for a checkup. The infant's skin turgor is weak, his or her face is drawn, and he or she hasn't gained any weight since birth. The woman is nursing her baby. The best course of action to take is

• Advise the mother to stop breastfeeding and switch to formula
• Question mother about nursing technique and frequency, and observe the infant nursing (Correct answer)
• Report the mother to child protective services for neglect

Correct answer: Question mother about nursing technique and frequency, and observe the infant nursing

The infant's symptoms (weak skin turgor, drawn face, no weight gain) strongly suggest dehydration and inadequate feeding. Since the mother is nursing, the most appropriate first action is to assess the breastfeeding process, including technique and frequency, and observe a feeding session. This will help identify issues like poor latch or insufficient milk transfer, which are common causes of poor weight gain and dehydration in breastfed newborns.

Question 159: Angiotensin II levels to rise or intravascular volume to decrease.

• Pkd is an what genetic
• Bun is conserved
• ADH is released (Correct answer)
• Thirst is stimulated

Correct answer: ADH is released

Antidiuretic Hormone (ADH), also known as vasopressin, is released from the posterior pituitary gland in response to various stimuli, including increased plasma osmolality (often due to decreased intravascular volume) and the presence of Angiotensin II. ADH acts on the kidneys to increase water reabsorption, thereby conserving body fluid and helping to restore blood volume and pressure.

Question 160: A preterm infant receiving gentamicin for sepsis has a trough level of 2.8 mcg/mL (goal <1 mcg/mL). Which action is most appropriate?

• Increase the dose to achieve higher peak levels
• Extend the dosing interval and recheck trough before next dose (Correct answer)
• Continue current regimen and recheck in 48 hours
• Discontinue gentamicin and switch to tobramycin

Correct answer: Extend the dosing interval and recheck trough before next dose

Elevated trough gentamicin levels indicate accumulation and nephrotoxicity/ototoxicity risk, requiring interval extension until trough normalizes.