ENPC EXAM with Questions and Answers/Plus a
Rationale Updated 2026 A+/Instant Download PDF
EXAM COVERAGE
1. Pediatric Assessment Triangle and Primary Assessment
2. Respiratory Emergencies and Airway Management
3. Cardiovascular Emergencies and Shock
4. Trauma and Musculoskeletal Injuries
5. Medical, Environmental, and Toxicological Emergencies
1. A 3-year-old child presents to the emergency department via EMS following a sudden onset of
severe respiratory distress. Upon initial visual evaluation from the doorway (the Pediatric
Assessment Triangle), the child is sitting upright, leaning forward, drooling profusely, and
exhibiting inspiratory stridor with minimal chest wall movement. What is the most appropriate
priority nursing intervention?
A. Keep the child calm in a position of comfort and prepare for immediate pediatric airway
specialist evaluation without forcing a throat inspection.
B. Immediately place the child supine, open the airway using the head-tilt/chin-lift maneuver,
and inspect the posterior pharynx with a tongue depressor.
C. Administer 100% oxygen via a tight-fitting non-rebreather face mask while forcefully holding
the child down to establish intravenous access.
D. Immediately administer nebulized racemic epinephrine and draw arterial blood gases from the
radial artery.
CORRECT ANSWER : A
Rationale: The presentation of drooling, tripod positioning, stridor, and severe distress strongly
suggests acute epiglottitis. Forcing the child supine or attempting visualization with a tongue
depressor can trigger complete airway obstruction and laryngospasm, making calm positioning
and avoidance of agitation critical.
,2. A 6-month-old infant is brought in after an apparent brief resolved unexplained event (BRUE).
The infant is currently alert, interactive, and has normal vital signs and a negative physical
examination. According to current guidelines, which diagnostic workup is most appropriate for a
low-risk BRUE in this infant?
A. Perform a thorough history and physical examination, obtain a 12-lead ECG, and
evaluate the need for pertussis testing based on exposure history.
B. Admit the infant immediately to the pediatric intensive care unit for continuous 72-hour
electroencephalogram (EEG) and lumbar puncture.
C. Order a comprehensive panel including computed tomography (CT) of the head, routine
skeletal survey, and upper gastrointestinal contrast study.
D. Discharge the family immediately without further diagnostic evaluation or observation since
the infant is currently normal.
CORRECT ANSWER : A
Rationale: Low-risk BRUE guidelines recommend a targeted history and physical examination,
an electrocardiogram to rule out long QT syndrome, and selective testing such as pertussis or
respiratory panels, avoiding excessive invasive testing. Options B, C, and D represent either
unwarranted invasive procedures or unsafe premature discharge without basic risk
stratification.
3. A 4-year-old child is admitted following a near-drowning incident in a community pool. The
child is intubated, mechanically ventilated, and exhibits cool extremities, delayed capillary refill,
and hypotension. Which pathophysiological mechanism primarily drives the hemodynamic
instability in this patient?
A. Hypoxia-induced myocardial depression, hypothermia, and systemic inflammatory
response syndrome (SIRS) leading to distributive and cardiogenic shock.
B. Primary isolated neurogenic shock caused by immediate cerebral edema and brainstem
herniation.
C. Acute primary adrenal crisis secondary to freshwater electrolyte shifts across the alveolar
membrane.
D. Immediate septic shock resulting from contaminated pool water aspiration into the
gastrointestinal tract.
CORRECT ANSWER : A
Rationale: Near-drowning causes severe systemic hypoxemia, which depresses myocardial
contractility, disrupts cellular metabolism, and triggers a generalized inflammatory response
, resulting in mixed cardiogenic and distributive shock. Options B, C, and D misstate the primary
pathophysiological drivers of post-immersion collapse.
4. A school-aged child with a known history of type 1 diabetes mellitus presents with lethargy,
Kussmaul respirations, fruity breath odor, and severe dehydration. Laboratory findings reveal
severe hyperglycemia, metabolic acidosis, and ketonuria. During the initial fluid resuscitation
phase of diabetic ketoacidosis (DKA), what is the primary risk associated with the rapid
administration of hypotonic intravenous fluids?
A. Rapid intracellular fluid shifts resulting in acute cerebral edema and elevated
intracranial pressure.
B. Immediate hyperkalemia leading directly to refractory ventricular fibrillation.
C. Worsening peripheral vasoconstriction and acute renal tubular necrosis.
D. Profound systemic hypertension and acute hypertensive encephalopathy.
CORRECT ANSWER : A
Rationale: Administering large volumes of hypotonic fluids too rapidly in pediatric DKA lowers
serum osmolality too quickly, causing water to rush into brain cells and triggering fatal cerebral
edema. Options B, C, and D do not accurately describe the primary neurological complication
associated with fluid management in pediatric DKA.
5. A 2-year-old toddler is evaluated for acute ingestion of an unknown quantity of grandmother’s
medication. The child presents with lethargy, miosis, bradypnea, and hypothermia. Which
specific pharmacological reversal agent should the emergency nurse anticipate ordering and
administering?
A. Naloxone hydrochloride
B. Flumazenil hydrochloride
C. N-acetylcysteine
D. Sodium bicarbonate
CORRECT ANSWER : A
Rationale: The triad of miosis (pinpoint pupils), central nervous system depression, and
respiratory depression strongly indicates opioid toxicity, which is reversed with naloxone.
Option B reverses benzodiazepines, Option C is for acetaminophen, and Option D treats
alkalinization needs such as tricyclic overdoses.
, 6. An 8-year-old child sustains multiple blunt force trauma injuries during a high-speed motor
vehicle collision. On arrival, the child is tachycardic, has cool, mottled extremities, and a blood
pressure at the lower limit of normal for age. The nurse recognizes that this clinical picture
represents which stage of shock?
A. Compensated shock, where physiological mechanisms maintain blood pressure despite
significantly reduced organ perfusion.
B. Irreversible shock, where cellular death and multi-organ system failure are already complete.
C. Decompensated shock, characterized by profound hypotension and unresponsiveness.
D. Septic shock, caused by early bacterial translocation across damaged bowel mucosa.
CORRECT ANSWER : A
Rationale: In compensated shock, neuroendocrine and cardiovascular compensatory
mechanisms (such as tachycardia and vasoconstriction) maintain blood pressure despite
declining cardiac output and perfusion. Options B and C describe more advanced stages of
shock where blood pressure finally collapses.
7. A 5-year-old child presents with a 2-day history of high fever, barking cough, and hoarseness
that worsens at night. The child appears anxious but has a clear airway without drooling. What is
the most appropriate initial nursing intervention?
A. Administer a single dose of oral dexamethasone and provide cool mist or humidified
oxygen while keeping the child calm.
B. Immediately prepare for emergency endotracheal intubation in the operating suite under
general anesthesia.
C. Administer intravenous broad-spectrum antibiotics and draw serial blood cultures.
D. Perform aggressive oral suctioning every 15 minutes to clear upper airway secretions.
CORRECT ANSWER : A
Rationale: The clinical presentation is classic for viral croup (laryngotracheobronchitis).
Corticosteroids (dexamethasone) and humidified air or mist are standard initial treatments
designed to reduce airway edema safely without agitation. Options B, C, and D are overly
invasive or incorrect for uncomplicated croup.
8. A 7-year-old child is brought to the emergency department with acute onset of right lower
quadrant abdominal pain, low-grade fever, and vomiting. The nurse palpates the abdomen and
notes localized tenderness and guarding. Which diagnostic imaging modality is preferred as the
Rationale Updated 2026 A+/Instant Download PDF
EXAM COVERAGE
1. Pediatric Assessment Triangle and Primary Assessment
2. Respiratory Emergencies and Airway Management
3. Cardiovascular Emergencies and Shock
4. Trauma and Musculoskeletal Injuries
5. Medical, Environmental, and Toxicological Emergencies
1. A 3-year-old child presents to the emergency department via EMS following a sudden onset of
severe respiratory distress. Upon initial visual evaluation from the doorway (the Pediatric
Assessment Triangle), the child is sitting upright, leaning forward, drooling profusely, and
exhibiting inspiratory stridor with minimal chest wall movement. What is the most appropriate
priority nursing intervention?
A. Keep the child calm in a position of comfort and prepare for immediate pediatric airway
specialist evaluation without forcing a throat inspection.
B. Immediately place the child supine, open the airway using the head-tilt/chin-lift maneuver,
and inspect the posterior pharynx with a tongue depressor.
C. Administer 100% oxygen via a tight-fitting non-rebreather face mask while forcefully holding
the child down to establish intravenous access.
D. Immediately administer nebulized racemic epinephrine and draw arterial blood gases from the
radial artery.
CORRECT ANSWER : A
Rationale: The presentation of drooling, tripod positioning, stridor, and severe distress strongly
suggests acute epiglottitis. Forcing the child supine or attempting visualization with a tongue
depressor can trigger complete airway obstruction and laryngospasm, making calm positioning
and avoidance of agitation critical.
,2. A 6-month-old infant is brought in after an apparent brief resolved unexplained event (BRUE).
The infant is currently alert, interactive, and has normal vital signs and a negative physical
examination. According to current guidelines, which diagnostic workup is most appropriate for a
low-risk BRUE in this infant?
A. Perform a thorough history and physical examination, obtain a 12-lead ECG, and
evaluate the need for pertussis testing based on exposure history.
B. Admit the infant immediately to the pediatric intensive care unit for continuous 72-hour
electroencephalogram (EEG) and lumbar puncture.
C. Order a comprehensive panel including computed tomography (CT) of the head, routine
skeletal survey, and upper gastrointestinal contrast study.
D. Discharge the family immediately without further diagnostic evaluation or observation since
the infant is currently normal.
CORRECT ANSWER : A
Rationale: Low-risk BRUE guidelines recommend a targeted history and physical examination,
an electrocardiogram to rule out long QT syndrome, and selective testing such as pertussis or
respiratory panels, avoiding excessive invasive testing. Options B, C, and D represent either
unwarranted invasive procedures or unsafe premature discharge without basic risk
stratification.
3. A 4-year-old child is admitted following a near-drowning incident in a community pool. The
child is intubated, mechanically ventilated, and exhibits cool extremities, delayed capillary refill,
and hypotension. Which pathophysiological mechanism primarily drives the hemodynamic
instability in this patient?
A. Hypoxia-induced myocardial depression, hypothermia, and systemic inflammatory
response syndrome (SIRS) leading to distributive and cardiogenic shock.
B. Primary isolated neurogenic shock caused by immediate cerebral edema and brainstem
herniation.
C. Acute primary adrenal crisis secondary to freshwater electrolyte shifts across the alveolar
membrane.
D. Immediate septic shock resulting from contaminated pool water aspiration into the
gastrointestinal tract.
CORRECT ANSWER : A
Rationale: Near-drowning causes severe systemic hypoxemia, which depresses myocardial
contractility, disrupts cellular metabolism, and triggers a generalized inflammatory response
, resulting in mixed cardiogenic and distributive shock. Options B, C, and D misstate the primary
pathophysiological drivers of post-immersion collapse.
4. A school-aged child with a known history of type 1 diabetes mellitus presents with lethargy,
Kussmaul respirations, fruity breath odor, and severe dehydration. Laboratory findings reveal
severe hyperglycemia, metabolic acidosis, and ketonuria. During the initial fluid resuscitation
phase of diabetic ketoacidosis (DKA), what is the primary risk associated with the rapid
administration of hypotonic intravenous fluids?
A. Rapid intracellular fluid shifts resulting in acute cerebral edema and elevated
intracranial pressure.
B. Immediate hyperkalemia leading directly to refractory ventricular fibrillation.
C. Worsening peripheral vasoconstriction and acute renal tubular necrosis.
D. Profound systemic hypertension and acute hypertensive encephalopathy.
CORRECT ANSWER : A
Rationale: Administering large volumes of hypotonic fluids too rapidly in pediatric DKA lowers
serum osmolality too quickly, causing water to rush into brain cells and triggering fatal cerebral
edema. Options B, C, and D do not accurately describe the primary neurological complication
associated with fluid management in pediatric DKA.
5. A 2-year-old toddler is evaluated for acute ingestion of an unknown quantity of grandmother’s
medication. The child presents with lethargy, miosis, bradypnea, and hypothermia. Which
specific pharmacological reversal agent should the emergency nurse anticipate ordering and
administering?
A. Naloxone hydrochloride
B. Flumazenil hydrochloride
C. N-acetylcysteine
D. Sodium bicarbonate
CORRECT ANSWER : A
Rationale: The triad of miosis (pinpoint pupils), central nervous system depression, and
respiratory depression strongly indicates opioid toxicity, which is reversed with naloxone.
Option B reverses benzodiazepines, Option C is for acetaminophen, and Option D treats
alkalinization needs such as tricyclic overdoses.
, 6. An 8-year-old child sustains multiple blunt force trauma injuries during a high-speed motor
vehicle collision. On arrival, the child is tachycardic, has cool, mottled extremities, and a blood
pressure at the lower limit of normal for age. The nurse recognizes that this clinical picture
represents which stage of shock?
A. Compensated shock, where physiological mechanisms maintain blood pressure despite
significantly reduced organ perfusion.
B. Irreversible shock, where cellular death and multi-organ system failure are already complete.
C. Decompensated shock, characterized by profound hypotension and unresponsiveness.
D. Septic shock, caused by early bacterial translocation across damaged bowel mucosa.
CORRECT ANSWER : A
Rationale: In compensated shock, neuroendocrine and cardiovascular compensatory
mechanisms (such as tachycardia and vasoconstriction) maintain blood pressure despite
declining cardiac output and perfusion. Options B and C describe more advanced stages of
shock where blood pressure finally collapses.
7. A 5-year-old child presents with a 2-day history of high fever, barking cough, and hoarseness
that worsens at night. The child appears anxious but has a clear airway without drooling. What is
the most appropriate initial nursing intervention?
A. Administer a single dose of oral dexamethasone and provide cool mist or humidified
oxygen while keeping the child calm.
B. Immediately prepare for emergency endotracheal intubation in the operating suite under
general anesthesia.
C. Administer intravenous broad-spectrum antibiotics and draw serial blood cultures.
D. Perform aggressive oral suctioning every 15 minutes to clear upper airway secretions.
CORRECT ANSWER : A
Rationale: The clinical presentation is classic for viral croup (laryngotracheobronchitis).
Corticosteroids (dexamethasone) and humidified air or mist are standard initial treatments
designed to reduce airway edema safely without agitation. Options B, C, and D are overly
invasive or incorrect for uncomplicated croup.
8. A 7-year-old child is brought to the emergency department with acute onset of right lower
quadrant abdominal pain, low-grade fever, and vomiting. The nurse palpates the abdomen and
notes localized tenderness and guarding. Which diagnostic imaging modality is preferred as the
