ARA350 Pediatric and Obstetric Emergencies Exam Prep – Real Practice
Questions, Answers & Detailed Rationales (Updated 2026) | Pediatric
Assessment & Respiratory Emergencies, Shock & Trauma in Children, Neonatal
Resuscitation Basics, Obstetric Emergencies, Labor & Delivery Complications,
Postpartum Hemorrhage, Fetal Distress, Emergency Childbirth Procedures, EMS
Maternal-Newborn Care & Clinical Scenarios
Question 1: A 4-year-old child presents with severe respiratory distress, a barking
cough, and inspiratory stridor that worsens with agitation. Which intervention is
MOST appropriate as initial management?
A. Administer racemic epinephrine via nebulizer
B. Perform immediate endotracheal intubation
C. Apply high-flow oxygen via non-rebreather mask
D. Give intravenous dexamethasone 0.6 mg/kg
CORRECT ANSWER: A. Administer racemic epinephrine via nebulizer
Rationale: This presentation is classic for moderate to severe croup
(laryngotracheobronchitis). Racemic epinephrine via nebulizer provides rapid alpha-
adrenergic mediated reduction of subglottic edema, improving airway obstruction
within 10-30 minutes. While dexamethasone is essential for reducing inflammation and
preventing rebound, its onset is delayed (4-6 hours). Oxygen is supportive but does not
address the underlying edema. Intubation is reserved for impending respiratory failure
after medical management fails.
Question 2: During management of a term newborn with persistent bradycardia
(heart rate 50 bpm) despite effective positive-pressure ventilation and chest
compressions, which medication should be administered FIRST?
A. Atropine 0.02 mg/kg IV
B. Epinephrine 0.01 mg/kg IV via umbilical vein
C. Normal saline 10 mL/kg IV bolus
D. Sodium bicarbonate 1 mEq/kg IV
CORRECT ANSWER: B. Epinephrine 0.01 mg/kg IV via umbilical vein
Rationale: According to Neonatal Resuscitation Program (NRP) guidelines, when a
newborn remains bradycardic (HR <60 bpm) after 30 seconds of effective PPV with
chest compressions, epinephrine is the next intervention. The preferred route is IV via
umbilical vein at 0.01-0.03 mg/kg. Atropine is not recommended in neonatal
resuscitation. Fluid bolus is indicated for hypovolemia, not primary bradycardia.
Sodium bicarbonate is rarely used and only after prolonged resuscitation with
documented metabolic acidosis.
Question 3: A pregnant patient at 32 weeks gestation presents with sudden onset of
severe abdominal pain, vaginal bleeding, and a rigid, tender uterus. Fetal
monitoring shows late decelerations. Which obstetric emergency is MOST likely?
,A. Placenta previa
B. Uterine rupture
C. Placental abruption
D. Vasa previa
CORRECT ANSWER: C. Placental abruption
Rationale: Placental abruption classically presents with painful vaginal bleeding,
uterine tenderness/rigidity, and fetal distress (late decelerations indicating
uteroplacental insufficiency). The triad of abdominal pain, bleeding, and uterine
hypertonicity is highly suggestive. Placenta previa typically presents with painless
bleeding. Uterine rupture often occurs in patients with prior uterine surgery and may
present with loss of fetal station. Vasa previa presents with painless bleeding and fetal
bradycardia after membrane rupture.
Question 4: Which pediatric vital sign parameter is MOST reliable for assessing
severity of dehydration in an infant?
A. Heart rate
B. Capillary refill time
C. Skin turgor
D. Urine output
CORRECT ANSWER: B. Capillary refill time
Rationale: Capillary refill time (>2 seconds) is a sensitive and specific indicator of poor
perfusion and moderate to severe dehydration in infants and young children. While
heart rate increases with dehydration, it is non-specific and influenced by fever, pain, or
anxiety. Skin turgor is less reliable in infants due to naturally elastic skin. Urine output is
useful but difficult to assess acutely in the prehospital or emergency setting without
catheterization.
Question 5: A 6-month-old infant presents with paroxysmal coughing episodes
followed by a high-pitched "whoop" and post-tussive emesis. Which pathogen is
MOST commonly responsible?
A. Respiratory syncytial virus (RSV)
B. Bordetella pertussis
C. Chlamydia trachomatis
D. Streptococcus pneumoniae
CORRECT ANSWER: B. Bordetella pertussis
Rationale: The classic presentation of pertussis (whooping cough) includes paroxysmal
coughing, inspiratory whoop, and post-tussive vomiting, particularly in unvaccinated or
partially vaccinated infants. RSV causes bronchiolitis with wheezing and respiratory
distress. Chlamydia trachomatis causes afebrile pneumonia with staccato cough in
infants 2-12 weeks old. S. pneumoniae typically causes lobar pneumonia with fever and
focal findings.
,Question 6: During shoulder dystocia management, which maneuver should be
attempted FIRST after calling for help and performing McRoberts maneuver?
A. Suprapubic pressure
B. Woods screw maneuver
C. Delivery of posterior arm
D. Zavanelli maneuver
CORRECT ANSWER: A. Suprapubic pressure
Rationale: The standard algorithm for shoulder dystocia follows the "HELPERR"
mnemonic. After calling for help, episiotomy consideration, and McRoberts maneuver
(hyperflexion of maternal hips), suprapubic pressure is applied to dislodge the anterior
shoulder from behind the symphysis pubis. Internal maneuvers (Woods screw,
posterior arm delivery) are subsequent steps. Zavanelli maneuver (cephalic
replacement) is a last-resort intervention before surgical options.
Question 7: A 2-year-old child ingests an unknown quantity of iron tablets. Which
finding is MOST indicative of severe toxicity requiring chelation therapy?
A. Vomiting and diarrhea within 2 hours
B. Metabolic acidosis with elevated anion gap
C. Leukocytosis and hyperglycemia
D. Radiopaque tablets on abdominal X-ray
CORRECT ANSWER: B. Metabolic acidosis with elevated anion gap
Rationale: Iron toxicity progresses through stages. Severe toxicity (stage 2-3) is
characterized by metabolic acidosis, shock, and coagulopathy due to mitochondrial
dysfunction and free radical damage. An elevated anion gap metabolic acidosis
indicates cellular toxicity and is an indication for deferoxamine chelation. Early GI
symptoms (A) are common but not specific for severity. Leukocytosis/hyperglycemia (C)
may occur but are less specific. Radiopaque tablets (D) confirm ingestion but not
severity.
Question 8: Which finding on fetal heart rate monitoring is MOST concerning for
uteroplacental insufficiency?
A. Early decelerations
B. Variable decelerations
C. Late decelerations
D. Accelerations
CORRECT ANSWER: C. Late decelerations
Rationale: Late decelerations are characterized by a gradual decrease in FHR beginning
after the peak of a contraction, with return to baseline after the contraction ends. They
indicate uteroplacental insufficiency and fetal hypoxemia due to impaired oxygen
transfer during uterine contractions. Early decelerations reflect head compression and
, are benign. Variable decelerations suggest cord compression. Accelerations indicate
fetal well-being.
Question 9: A neonate born at 28 weeks gestation develops grunting, nasal flaring,
and subcostal retractions within minutes of birth. Chest X-ray shows a "ground-
glass" appearance with air bronchograms. Which condition is MOST likely?
A. Transient tachypnea of the newborn (TTN)
B. Respiratory distress syndrome (RDS)
C. Meconium aspiration syndrome
D. Pneumonia
CORRECT ANSWER: B. Respiratory distress syndrome (RDS)
Rationale: RDS due to surfactant deficiency is classic in preterm infants <32 weeks,
presenting immediately after birth with signs of respiratory distress and characteristic
CXR findings of diffuse ground-glass opacity with air bronchograms. TTN typically
occurs in term/near-term infants after C-section and shows prominent pulmonary
vascular markings. Meconium aspiration occurs in post-term infants with meconium-
stained fluid. Pneumonia may have similar CXR but usually has risk factors and later
onset.
Question 10: Which medication is CONTRAINDICATED in the management of
pediatric status epilepticus due to risk of respiratory depression and hypotension?
A. Lorazepam IV
B. Midazolam IM
C. Phenobarbital IV
D. Propofol IV
CORRECT ANSWER: D. Propofol IV
Rationale: While propofol is used for refractory status epilepticus in controlled ICU
settings, it is contraindicated as a first- or second-line agent in prehospital or
emergency settings due to high risk of profound respiratory depression, hypotension,
and propofol infusion syndrome (especially with prolonged use). Benzodiazepines
(lorazepam, midazolam) are first-line. Phenobarbital is a second-line agent with a safer
hemodynamic profile than propofol in acute settings.
Question 11: A pregnant patient at 36 weeks presents with headache, visual
changes, and blood pressure 168/112 mmHg. Urinalysis shows 3+ protein. Which
intervention is MOST critical to prevent progression to eclampsia?
A. Administer labetalol IV to lower BP to <140/90
B. Initiate magnesium sulfate infusion
C. Perform immediate cesarean delivery
D. Give oral nifedipine for BP control
CORRECT ANSWER: B. Initiate magnesium sulfate infusion
Questions, Answers & Detailed Rationales (Updated 2026) | Pediatric
Assessment & Respiratory Emergencies, Shock & Trauma in Children, Neonatal
Resuscitation Basics, Obstetric Emergencies, Labor & Delivery Complications,
Postpartum Hemorrhage, Fetal Distress, Emergency Childbirth Procedures, EMS
Maternal-Newborn Care & Clinical Scenarios
Question 1: A 4-year-old child presents with severe respiratory distress, a barking
cough, and inspiratory stridor that worsens with agitation. Which intervention is
MOST appropriate as initial management?
A. Administer racemic epinephrine via nebulizer
B. Perform immediate endotracheal intubation
C. Apply high-flow oxygen via non-rebreather mask
D. Give intravenous dexamethasone 0.6 mg/kg
CORRECT ANSWER: A. Administer racemic epinephrine via nebulizer
Rationale: This presentation is classic for moderate to severe croup
(laryngotracheobronchitis). Racemic epinephrine via nebulizer provides rapid alpha-
adrenergic mediated reduction of subglottic edema, improving airway obstruction
within 10-30 minutes. While dexamethasone is essential for reducing inflammation and
preventing rebound, its onset is delayed (4-6 hours). Oxygen is supportive but does not
address the underlying edema. Intubation is reserved for impending respiratory failure
after medical management fails.
Question 2: During management of a term newborn with persistent bradycardia
(heart rate 50 bpm) despite effective positive-pressure ventilation and chest
compressions, which medication should be administered FIRST?
A. Atropine 0.02 mg/kg IV
B. Epinephrine 0.01 mg/kg IV via umbilical vein
C. Normal saline 10 mL/kg IV bolus
D. Sodium bicarbonate 1 mEq/kg IV
CORRECT ANSWER: B. Epinephrine 0.01 mg/kg IV via umbilical vein
Rationale: According to Neonatal Resuscitation Program (NRP) guidelines, when a
newborn remains bradycardic (HR <60 bpm) after 30 seconds of effective PPV with
chest compressions, epinephrine is the next intervention. The preferred route is IV via
umbilical vein at 0.01-0.03 mg/kg. Atropine is not recommended in neonatal
resuscitation. Fluid bolus is indicated for hypovolemia, not primary bradycardia.
Sodium bicarbonate is rarely used and only after prolonged resuscitation with
documented metabolic acidosis.
Question 3: A pregnant patient at 32 weeks gestation presents with sudden onset of
severe abdominal pain, vaginal bleeding, and a rigid, tender uterus. Fetal
monitoring shows late decelerations. Which obstetric emergency is MOST likely?
,A. Placenta previa
B. Uterine rupture
C. Placental abruption
D. Vasa previa
CORRECT ANSWER: C. Placental abruption
Rationale: Placental abruption classically presents with painful vaginal bleeding,
uterine tenderness/rigidity, and fetal distress (late decelerations indicating
uteroplacental insufficiency). The triad of abdominal pain, bleeding, and uterine
hypertonicity is highly suggestive. Placenta previa typically presents with painless
bleeding. Uterine rupture often occurs in patients with prior uterine surgery and may
present with loss of fetal station. Vasa previa presents with painless bleeding and fetal
bradycardia after membrane rupture.
Question 4: Which pediatric vital sign parameter is MOST reliable for assessing
severity of dehydration in an infant?
A. Heart rate
B. Capillary refill time
C. Skin turgor
D. Urine output
CORRECT ANSWER: B. Capillary refill time
Rationale: Capillary refill time (>2 seconds) is a sensitive and specific indicator of poor
perfusion and moderate to severe dehydration in infants and young children. While
heart rate increases with dehydration, it is non-specific and influenced by fever, pain, or
anxiety. Skin turgor is less reliable in infants due to naturally elastic skin. Urine output is
useful but difficult to assess acutely in the prehospital or emergency setting without
catheterization.
Question 5: A 6-month-old infant presents with paroxysmal coughing episodes
followed by a high-pitched "whoop" and post-tussive emesis. Which pathogen is
MOST commonly responsible?
A. Respiratory syncytial virus (RSV)
B. Bordetella pertussis
C. Chlamydia trachomatis
D. Streptococcus pneumoniae
CORRECT ANSWER: B. Bordetella pertussis
Rationale: The classic presentation of pertussis (whooping cough) includes paroxysmal
coughing, inspiratory whoop, and post-tussive vomiting, particularly in unvaccinated or
partially vaccinated infants. RSV causes bronchiolitis with wheezing and respiratory
distress. Chlamydia trachomatis causes afebrile pneumonia with staccato cough in
infants 2-12 weeks old. S. pneumoniae typically causes lobar pneumonia with fever and
focal findings.
,Question 6: During shoulder dystocia management, which maneuver should be
attempted FIRST after calling for help and performing McRoberts maneuver?
A. Suprapubic pressure
B. Woods screw maneuver
C. Delivery of posterior arm
D. Zavanelli maneuver
CORRECT ANSWER: A. Suprapubic pressure
Rationale: The standard algorithm for shoulder dystocia follows the "HELPERR"
mnemonic. After calling for help, episiotomy consideration, and McRoberts maneuver
(hyperflexion of maternal hips), suprapubic pressure is applied to dislodge the anterior
shoulder from behind the symphysis pubis. Internal maneuvers (Woods screw,
posterior arm delivery) are subsequent steps. Zavanelli maneuver (cephalic
replacement) is a last-resort intervention before surgical options.
Question 7: A 2-year-old child ingests an unknown quantity of iron tablets. Which
finding is MOST indicative of severe toxicity requiring chelation therapy?
A. Vomiting and diarrhea within 2 hours
B. Metabolic acidosis with elevated anion gap
C. Leukocytosis and hyperglycemia
D. Radiopaque tablets on abdominal X-ray
CORRECT ANSWER: B. Metabolic acidosis with elevated anion gap
Rationale: Iron toxicity progresses through stages. Severe toxicity (stage 2-3) is
characterized by metabolic acidosis, shock, and coagulopathy due to mitochondrial
dysfunction and free radical damage. An elevated anion gap metabolic acidosis
indicates cellular toxicity and is an indication for deferoxamine chelation. Early GI
symptoms (A) are common but not specific for severity. Leukocytosis/hyperglycemia (C)
may occur but are less specific. Radiopaque tablets (D) confirm ingestion but not
severity.
Question 8: Which finding on fetal heart rate monitoring is MOST concerning for
uteroplacental insufficiency?
A. Early decelerations
B. Variable decelerations
C. Late decelerations
D. Accelerations
CORRECT ANSWER: C. Late decelerations
Rationale: Late decelerations are characterized by a gradual decrease in FHR beginning
after the peak of a contraction, with return to baseline after the contraction ends. They
indicate uteroplacental insufficiency and fetal hypoxemia due to impaired oxygen
transfer during uterine contractions. Early decelerations reflect head compression and
, are benign. Variable decelerations suggest cord compression. Accelerations indicate
fetal well-being.
Question 9: A neonate born at 28 weeks gestation develops grunting, nasal flaring,
and subcostal retractions within minutes of birth. Chest X-ray shows a "ground-
glass" appearance with air bronchograms. Which condition is MOST likely?
A. Transient tachypnea of the newborn (TTN)
B. Respiratory distress syndrome (RDS)
C. Meconium aspiration syndrome
D. Pneumonia
CORRECT ANSWER: B. Respiratory distress syndrome (RDS)
Rationale: RDS due to surfactant deficiency is classic in preterm infants <32 weeks,
presenting immediately after birth with signs of respiratory distress and characteristic
CXR findings of diffuse ground-glass opacity with air bronchograms. TTN typically
occurs in term/near-term infants after C-section and shows prominent pulmonary
vascular markings. Meconium aspiration occurs in post-term infants with meconium-
stained fluid. Pneumonia may have similar CXR but usually has risk factors and later
onset.
Question 10: Which medication is CONTRAINDICATED in the management of
pediatric status epilepticus due to risk of respiratory depression and hypotension?
A. Lorazepam IV
B. Midazolam IM
C. Phenobarbital IV
D. Propofol IV
CORRECT ANSWER: D. Propofol IV
Rationale: While propofol is used for refractory status epilepticus in controlled ICU
settings, it is contraindicated as a first- or second-line agent in prehospital or
emergency settings due to high risk of profound respiratory depression, hypotension,
and propofol infusion syndrome (especially with prolonged use). Benzodiazepines
(lorazepam, midazolam) are first-line. Phenobarbital is a second-line agent with a safer
hemodynamic profile than propofol in acute settings.
Question 11: A pregnant patient at 36 weeks presents with headache, visual
changes, and blood pressure 168/112 mmHg. Urinalysis shows 3+ protein. Which
intervention is MOST critical to prevent progression to eclampsia?
A. Administer labetalol IV to lower BP to <140/90
B. Initiate magnesium sulfate infusion
C. Perform immediate cesarean delivery
D. Give oral nifedipine for BP control
CORRECT ANSWER: B. Initiate magnesium sulfate infusion
