CEN Emergency Nursing Triage Practice Exam Study Guide Updated 2026
| Verified Questions and Answers with Detailed Rationales | Triage Systems (ESI,
CTAS), Rapid Patient Assessment, Priority Setting and Decision-Making, Trauma
and Injury Triage, Cardiac and Respiratory Emergencies, Neurological and Stroke
Triage, Shock and Sepsis Identification, Pediatric and Geriatric Triage, Disaster
and Mass Casualty Incidents, ACLS and PALS Integration, NCLEX-Style Clinical
Judgment Questions | Complete Exam Prep Resource for CEN Certification
Success
Question 1: A 58-year-old male presents to the emergency department with sudden
onset of severe chest pain radiating to his left arm, diaphoresis, and shortness of
breath. His vital signs are BP 90/60 mmHg, HR 128 bpm, RR 28/min, SpO2 91% on
room air. According to the Emergency Severity Index (ESI), what triage level should
this patient be assigned?
A. ESI Level 2
B. ESI Level 3
C. ESI Level 4
D. ESI Level 1
CORRECT ANSWER: D. ESI Level 1
RATIONALE: This patient exhibits signs of a life-threatening condition (suspected acute
coronary syndrome with hemodynamic instability and hypoxia). ESI Level 1 is reserved
for patients requiring immediate life-saving interventions. The combination of
hypotension, tachycardia, hypoxia, and classic cardiac symptoms mandates immediate
intervention, meeting Level 1 criteria per ESI guidelines.
Question 2: During triage, a 3-year-old child presents with a barking cough, stridor
at rest, and mild retractions. The child is alert and maintaining oxygen saturation of
96% on room air. Which ESI triage level is most appropriate?
A. ESI Level 1
B. ESI Level 2
C. ESI Level 3
D. ESI Level 4
CORRECT ANSWER: B. ESI Level 2
RATIONALE: The child exhibits signs of moderate to severe croup with stridor at rest,
indicating potential airway compromise. While not immediately life-threatening (Level
1), this is a high-risk situation requiring prompt evaluation within 10 minutes. ESI Level 2
includes patients with potential for rapid deterioration or those in severe distress, which
aligns with pediatric airway emergencies.
Question 3: A 72-year-old female with a history of diabetes presents with
confusion, slurred speech, and right-sided weakness that began 45 minutes ago.
Her blood glucose is 180 mg/dL. What is the priority triage action?
,A. Assign ESI Level 3 and have her wait for registration
B. Assign ESI Level 1 and activate the stroke team immediately
C. Assign ESI Level 2 and obtain vital signs before provider evaluation
D. Assign ESI Level 4 and provide discharge instructions
CORRECT ANSWER: B. Assign ESI Level 1 and activate the stroke team immediately
RATIONALE: The patient presents with acute neurological deficits consistent with
ischemic stroke within the therapeutic window for thrombolytics. Time-sensitive
interventions require immediate activation of the stroke protocol. ESI Level 1 is
appropriate for conditions requiring immediate life- or function-saving interventions,
such as acute stroke with potential for reperfusion therapy.
Question 4: Which of the following patients should be triaged as ESI Level 2 based
on the Emergency Severity Index algorithm?
A. A 25-year-old with a simple forearm fracture and stable vital signs
B. A 45-year-old with new-onset atrial fibrillation with rapid ventricular response and
chest discomfort
C. A 60-year-old with a mild headache and normal neurological exam
D. A 30-year-old with a minor laceration requiring sutures
CORRECT ANSWER: B. A 45-year-old with new-onset atrial fibrillation with rapid
ventricular response and chest discomfort
RATIONALE: ESI Level 2 includes patients who are high-risk, confused, lethargic,
disoriented, or in severe pain/distress. New-onset atrial fibrillation with RVR and chest
discomfort represents a high-risk situation with potential for hemodynamic
compromise, requiring evaluation within 10 minutes. The other options represent lower-
acuity conditions appropriate for Levels 3-5.
Question 5: A triage nurse assesses a patient with a suspected opioid overdose
who is unresponsive with pinpoint pupils and a respiratory rate of 6 breaths per
minute. What is the immediate priority intervention?
A. Obtain a detailed substance use history
B. Administer naloxone per protocol
C. Place the patient in a private room for observation
D. Complete triage documentation before intervention
CORRECT ANSWER: B. Administer naloxone per protocol
RATIONALE: The patient exhibits life-threatening respiratory depression from opioid
overdose. Immediate administration of naloxone is a life-saving intervention that takes
precedence over assessment or documentation. In triage, any patient requiring
immediate intervention to prevent death or permanent disability is assigned ESI Level 1,
and interventions should not be delayed.
,Question 6: When triaging a patient with abdominal pain, which finding would
elevate the triage level to ESI Level 2?
A. Mild, intermittent pain rated 3/10 with normal vital signs
B. Severe, constant pain rated 9/10 with guarding and rebound tenderness
C. Pain that improves with antacids and no other symptoms
D. Chronic pain with a known diagnosis of irritable bowel syndrome
CORRECT ANSWER: B. Severe, constant pain rated 9/10 with guarding and rebound
tenderness
RATIONALE: Severe abdominal pain with peritoneal signs (guarding, rebound
tenderness) suggests a surgical emergency such as appendicitis, perforation, or
ischemic bowel. These high-risk presentations require prompt evaluation within 10
minutes, meeting ESI Level 2 criteria. Lower-acuity abdominal pain without red flags
may be triaged as Level 3 or lower.
Question 7: A 4-year-old child presents with fever of 104°F (40°C), lethargy, and a
petechial rash. The child is difficult to arouse. What ESI triage level is indicated?
A. ESI Level 1
B. ESI Level 2
C. ESI Level 3
D. ESI Level 4
CORRECT ANSWER: A. ESI Level 1
RATIONALE: The combination of high fever, lethargy, altered mental status, and
petechial rash raises concern for meningococcemia or bacterial meningitis, which are
life-threatening emergencies. Altered mental status in a pediatric patient with signs of
systemic infection requires immediate intervention and isolation, meeting ESI Level 1
criteria for conditions needing immediate life-saving measures.
Question 8: During mass casualty incident triage using the START (Simple Triage
and Rapid Treatment) system, a patient is breathing, has a radial pulse, and is
unable to follow simple commands. How should this patient be categorized?
A. Immediate (Red)
B. Delayed (Yellow)
C. Minimal (Green)
D. Expectant (Black)
CORRECT ANSWER: A. Immediate (Red)
RATIONALE: In START triage, patients who are breathing, have a radial pulse (indicating
adequate perfusion), but have altered mental status (unable to follow commands) are
categorized as Immediate (Red). This indicates significant neurological compromise
requiring urgent intervention. The START algorithm prioritizes patients based on
respiratory status, perfusion, and mental status.
, Question 9: A patient presents with a suspected anaphylactic reaction: facial
swelling, wheezing, and hypotension (BP 80/50 mmHg) after a bee sting. What is
the triage nurse's first action?
A. Obtain a detailed allergy history
B. Administer intramuscular epinephrine immediately
C. Place the patient in a waiting area to monitor progression
D. Complete the triage assessment before intervening
CORRECT ANSWER: B. Administer intramuscular epinephrine immediately
RATIONALE: Anaphylaxis with airway compromise and hypotension is a life-threatening
emergency requiring immediate epinephrine administration. Triage nurses must
recognize and initiate treatment for time-sensitive emergencies without delay. This
patient meets ESI Level 1 criteria, and interventions should precede comprehensive
assessment or documentation.
Question 10: Which statement best describes the primary purpose of the
Emergency Severity Index (ESI) triage system?
A. To determine the order of patient registration and billing
B. To predict hospital admission likelihood for bed management
C. To categorize patients based on acuity and resource needs for appropriate care
timing
D. To assign patients to specific emergency department providers based on specialty
CORRECT ANSWER: C. To categorize patients based on acuity and resource needs
for appropriate care timing
RATIONALE: The ESI is a five-level triage algorithm designed to sort patients by clinical
acuity and anticipated resource needs to ensure timely, appropriate care. It helps
prioritize patients who need immediate intervention (Level 1) versus those who can
safely wait (Levels 4-5), optimizing resource allocation and patient outcomes in the
emergency department.
Question 11: A 68-year-old male with COPD presents with increased shortness of
breath, use of accessory muscles, and SpO2 of 88% on room air. He is alert and
oriented. What ESI level is most appropriate?
A. ESI Level 1
B. ESI Level 2
C. ESI Level 3
D. ESI Level 4
CORRECT ANSWER: B. ESI Level 2
RATIONALE: The patient exhibits signs of acute respiratory distress with hypoxia (SpO2
88%) and increased work of breathing, indicating a high-risk exacerbation of COPD.
While not immediately requiring intubation (Level 1), this presentation requires prompt
| Verified Questions and Answers with Detailed Rationales | Triage Systems (ESI,
CTAS), Rapid Patient Assessment, Priority Setting and Decision-Making, Trauma
and Injury Triage, Cardiac and Respiratory Emergencies, Neurological and Stroke
Triage, Shock and Sepsis Identification, Pediatric and Geriatric Triage, Disaster
and Mass Casualty Incidents, ACLS and PALS Integration, NCLEX-Style Clinical
Judgment Questions | Complete Exam Prep Resource for CEN Certification
Success
Question 1: A 58-year-old male presents to the emergency department with sudden
onset of severe chest pain radiating to his left arm, diaphoresis, and shortness of
breath. His vital signs are BP 90/60 mmHg, HR 128 bpm, RR 28/min, SpO2 91% on
room air. According to the Emergency Severity Index (ESI), what triage level should
this patient be assigned?
A. ESI Level 2
B. ESI Level 3
C. ESI Level 4
D. ESI Level 1
CORRECT ANSWER: D. ESI Level 1
RATIONALE: This patient exhibits signs of a life-threatening condition (suspected acute
coronary syndrome with hemodynamic instability and hypoxia). ESI Level 1 is reserved
for patients requiring immediate life-saving interventions. The combination of
hypotension, tachycardia, hypoxia, and classic cardiac symptoms mandates immediate
intervention, meeting Level 1 criteria per ESI guidelines.
Question 2: During triage, a 3-year-old child presents with a barking cough, stridor
at rest, and mild retractions. The child is alert and maintaining oxygen saturation of
96% on room air. Which ESI triage level is most appropriate?
A. ESI Level 1
B. ESI Level 2
C. ESI Level 3
D. ESI Level 4
CORRECT ANSWER: B. ESI Level 2
RATIONALE: The child exhibits signs of moderate to severe croup with stridor at rest,
indicating potential airway compromise. While not immediately life-threatening (Level
1), this is a high-risk situation requiring prompt evaluation within 10 minutes. ESI Level 2
includes patients with potential for rapid deterioration or those in severe distress, which
aligns with pediatric airway emergencies.
Question 3: A 72-year-old female with a history of diabetes presents with
confusion, slurred speech, and right-sided weakness that began 45 minutes ago.
Her blood glucose is 180 mg/dL. What is the priority triage action?
,A. Assign ESI Level 3 and have her wait for registration
B. Assign ESI Level 1 and activate the stroke team immediately
C. Assign ESI Level 2 and obtain vital signs before provider evaluation
D. Assign ESI Level 4 and provide discharge instructions
CORRECT ANSWER: B. Assign ESI Level 1 and activate the stroke team immediately
RATIONALE: The patient presents with acute neurological deficits consistent with
ischemic stroke within the therapeutic window for thrombolytics. Time-sensitive
interventions require immediate activation of the stroke protocol. ESI Level 1 is
appropriate for conditions requiring immediate life- or function-saving interventions,
such as acute stroke with potential for reperfusion therapy.
Question 4: Which of the following patients should be triaged as ESI Level 2 based
on the Emergency Severity Index algorithm?
A. A 25-year-old with a simple forearm fracture and stable vital signs
B. A 45-year-old with new-onset atrial fibrillation with rapid ventricular response and
chest discomfort
C. A 60-year-old with a mild headache and normal neurological exam
D. A 30-year-old with a minor laceration requiring sutures
CORRECT ANSWER: B. A 45-year-old with new-onset atrial fibrillation with rapid
ventricular response and chest discomfort
RATIONALE: ESI Level 2 includes patients who are high-risk, confused, lethargic,
disoriented, or in severe pain/distress. New-onset atrial fibrillation with RVR and chest
discomfort represents a high-risk situation with potential for hemodynamic
compromise, requiring evaluation within 10 minutes. The other options represent lower-
acuity conditions appropriate for Levels 3-5.
Question 5: A triage nurse assesses a patient with a suspected opioid overdose
who is unresponsive with pinpoint pupils and a respiratory rate of 6 breaths per
minute. What is the immediate priority intervention?
A. Obtain a detailed substance use history
B. Administer naloxone per protocol
C. Place the patient in a private room for observation
D. Complete triage documentation before intervention
CORRECT ANSWER: B. Administer naloxone per protocol
RATIONALE: The patient exhibits life-threatening respiratory depression from opioid
overdose. Immediate administration of naloxone is a life-saving intervention that takes
precedence over assessment or documentation. In triage, any patient requiring
immediate intervention to prevent death or permanent disability is assigned ESI Level 1,
and interventions should not be delayed.
,Question 6: When triaging a patient with abdominal pain, which finding would
elevate the triage level to ESI Level 2?
A. Mild, intermittent pain rated 3/10 with normal vital signs
B. Severe, constant pain rated 9/10 with guarding and rebound tenderness
C. Pain that improves with antacids and no other symptoms
D. Chronic pain with a known diagnosis of irritable bowel syndrome
CORRECT ANSWER: B. Severe, constant pain rated 9/10 with guarding and rebound
tenderness
RATIONALE: Severe abdominal pain with peritoneal signs (guarding, rebound
tenderness) suggests a surgical emergency such as appendicitis, perforation, or
ischemic bowel. These high-risk presentations require prompt evaluation within 10
minutes, meeting ESI Level 2 criteria. Lower-acuity abdominal pain without red flags
may be triaged as Level 3 or lower.
Question 7: A 4-year-old child presents with fever of 104°F (40°C), lethargy, and a
petechial rash. The child is difficult to arouse. What ESI triage level is indicated?
A. ESI Level 1
B. ESI Level 2
C. ESI Level 3
D. ESI Level 4
CORRECT ANSWER: A. ESI Level 1
RATIONALE: The combination of high fever, lethargy, altered mental status, and
petechial rash raises concern for meningococcemia or bacterial meningitis, which are
life-threatening emergencies. Altered mental status in a pediatric patient with signs of
systemic infection requires immediate intervention and isolation, meeting ESI Level 1
criteria for conditions needing immediate life-saving measures.
Question 8: During mass casualty incident triage using the START (Simple Triage
and Rapid Treatment) system, a patient is breathing, has a radial pulse, and is
unable to follow simple commands. How should this patient be categorized?
A. Immediate (Red)
B. Delayed (Yellow)
C. Minimal (Green)
D. Expectant (Black)
CORRECT ANSWER: A. Immediate (Red)
RATIONALE: In START triage, patients who are breathing, have a radial pulse (indicating
adequate perfusion), but have altered mental status (unable to follow commands) are
categorized as Immediate (Red). This indicates significant neurological compromise
requiring urgent intervention. The START algorithm prioritizes patients based on
respiratory status, perfusion, and mental status.
, Question 9: A patient presents with a suspected anaphylactic reaction: facial
swelling, wheezing, and hypotension (BP 80/50 mmHg) after a bee sting. What is
the triage nurse's first action?
A. Obtain a detailed allergy history
B. Administer intramuscular epinephrine immediately
C. Place the patient in a waiting area to monitor progression
D. Complete the triage assessment before intervening
CORRECT ANSWER: B. Administer intramuscular epinephrine immediately
RATIONALE: Anaphylaxis with airway compromise and hypotension is a life-threatening
emergency requiring immediate epinephrine administration. Triage nurses must
recognize and initiate treatment for time-sensitive emergencies without delay. This
patient meets ESI Level 1 criteria, and interventions should precede comprehensive
assessment or documentation.
Question 10: Which statement best describes the primary purpose of the
Emergency Severity Index (ESI) triage system?
A. To determine the order of patient registration and billing
B. To predict hospital admission likelihood for bed management
C. To categorize patients based on acuity and resource needs for appropriate care
timing
D. To assign patients to specific emergency department providers based on specialty
CORRECT ANSWER: C. To categorize patients based on acuity and resource needs
for appropriate care timing
RATIONALE: The ESI is a five-level triage algorithm designed to sort patients by clinical
acuity and anticipated resource needs to ensure timely, appropriate care. It helps
prioritize patients who need immediate intervention (Level 1) versus those who can
safely wait (Levels 4-5), optimizing resource allocation and patient outcomes in the
emergency department.
Question 11: A 68-year-old male with COPD presents with increased shortness of
breath, use of accessory muscles, and SpO2 of 88% on room air. He is alert and
oriented. What ESI level is most appropriate?
A. ESI Level 1
B. ESI Level 2
C. ESI Level 3
D. ESI Level 4
CORRECT ANSWER: B. ESI Level 2
RATIONALE: The patient exhibits signs of acute respiratory distress with hypoxia (SpO2
88%) and increased work of breathing, indicating a high-risk exacerbation of COPD.
While not immediately requiring intubation (Level 1), this presentation requires prompt
