NCLEX-RN® Emergency and Triage: Priority Setting, Rapid Assessment, and Disaster Nursing
Emergency and triage nursing for the NCLEX-RN®: START triage categories, rapid primary survey, emergency priority-setting frameworks, and mass casualty incident nursing roles.
The big picture
Emergency nursing and triage appear throughout the NCLEX-RN® under Safety and Effective Care Environment and Physiological Integrity. Triage is a core nursing skill — quickly sorting patients by urgency to ensure the most critical receive care first. In an emergency, the nurse does not have the luxury of seeing every patient equally — they must make sound, fast clinical judgments about who needs immediate attention and who can wait.
Triage concepts
Definition and purpose
Triage (from French trier — to sort) is the systematic process of prioritizing patients based on the severity of their condition and their likelihood of survival with available resources. The goal is to do the most good for the most people.
In-hospital triage (Emergency Department)
The Emergency Severity Index (ESI) is the most widely used triage system in US emergency departments:
| ESI Level | Priority | Description | Example |
|---|---|---|---|
| 1 — Immediate | Life-threatening | Requires immediate intervention; unstable | Cardiac arrest, respiratory failure, active hemorrhage |
| 2 — Emergent | High urgency | High-risk; should not wait | Severe pain, altered mental status, major trauma, active MI |
| 3 — Urgent | Stable but complex | Multiple resources needed | Abdominal pain, moderate pain, fever |
| 4 — Less urgent | Stable | One resource needed | Simple laceration, minor fracture, URI |
| 5 — Non-urgent | Stable | No resources needed | Prescription refill, cold symptoms |
Mass casualty triage (START system)
START (Simple Triage and Rapid Treatment) is used in mass casualty incidents (MCI) when resources are overwhelmed. Each patient is assessed in under 60 seconds.
The assessment sequence: Respiration → Perfusion → Mental status (RPM)
| Color | Priority | Criteria | Examples |
|---|---|---|---|
| Black (Expectant) | Do not treat | Not breathing after airway repositioning; or unsurvivable injuries given available resources | Open skull fracture with brain matter visible, full-thickness burns > 60% TBSA |
| Red (Immediate) | First priority | Breathing but unstable (RR > 30, no radial pulse, or altered mental status) | Airway obstruction corrected by repositioning, severe shock, uncontrolled hemorrhage |
| Yellow (Delayed) | Second priority | Stable; can wait for care | Closed fractures, wounds without major hemorrhage, moderate burns |
| Green (Minor) | Third priority | Walking wounded; minimal care needed | Minor lacerations, sprains, psychological distress |
NCLEX® key: In mass casualty, patients who are not breathing even after airway opening are tagged black (expectant) — not because care is unimportant, but because limited resources are directed to those with a realistic chance of survival. This is a difficult but necessary principle.
Reverse triage (in resource-sufficient settings)
In settings with adequate resources (ER with normal patient load), the sickest go first — reverse of MCI triage. The most unstable receive immediate care.
Rapid assessment — the primary survey
The primary survey is the first assessment performed in any emergency. It follows the ABCDE format:
| Step | Assessment | Action if abnormal |
|---|---|---|
| A — Airway | Open? Obstruction? | Head-tilt chin-lift (no spinal); jaw thrust (spinal precautions); suction |
| B — Breathing | Rate, depth, effort, SpO₂ | Oxygen; BVM; prepare for intubation |
| C — Circulation | HR, BP, hemorrhage | Control bleeding (direct pressure); IV access; fluids; vasopressors |
| D — Disability | Level of consciousness, pupils, GCS, glucose | Glucose if altered; protect spinal cord; notify provider |
| E — Exposure | Full-body assessment; temperature | Uncover completely to find hidden injuries; warm to prevent hypothermia |
Only after stabilizing each step do you proceed to the next — life threats are treated as identified.
The Glasgow Coma Scale (GCS) in emergency assessment
| Component | Max score | Response scored |
|---|---|---|
| Eye opening | 4 | 4=spontaneous; 3=to voice; 2=to pain; 1=none |
| Verbal | 5 | 5=oriented; 4=confused; 3=words; 2=sounds; 1=none |
| Motor | 6 | 6=commands; 5=localizes; 4=withdraws; 3=flexion; 2=extension; 1=none |
| Total | 15 | 14–15=mild; 9–13=moderate; ≤ 8=severe → intubation |
Emergency priorities by presentation
Anaphylaxis
Life-threatening systemic allergic reaction. Causes: foods (nuts, shellfish), medications (penicillin, ASA, contrast dye), insect stings, latex.
Signs: Urticaria, angioedema, stridor/wheezing, hypotension, tachycardia, flushing, GI symptoms.
Priority treatment (sequence):
- Epinephrine 1:1,000 IM into the lateral thigh (anterolateral) — first and most critical action
- Call for help; prepare for potential intubation
- Oxygen
- IV access; fluid resuscitation for hypotension
- Diphenhydramine IV (blocks H1 receptors; does not replace epinephrine)
- Corticosteroids (reduce biphasic reaction — occurs 4–12 hours later in some patients)
NCLEX® rule: Epinephrine is always first for anaphylaxis — before antihistamines, before steroids. Delay in epinephrine = preventable death.
Hemorrhagic shock
Classify by the volume of blood lost:
| Class | Blood loss | Signs | Action |
|---|---|---|---|
| Class I | < 15% (< 750 mL) | Minimal; slight HR increase | Crystalloid |
| Class II | 15–30% (750–1,500 mL) | Tachycardia, anxiety, decreased pulse pressure | IV fluids, monitor closely |
| Class III | 30–40% (1,500–2,000 mL) | Marked tachycardia, hypotension, altered LOC | Rapid fluid resuscitation, blood products likely |
| Class IV | > 40% (> 2,000 mL) | Life-threatening; severe hypotension, confusion | Immediate blood transfusion, surgical intervention |
Fluid resuscitation: Isotonic crystalloid (normal saline or LR) 1–2 L bolus. For ongoing hemorrhage: blood products (PRBCs, FFP, platelets in 1:1:1 ratio for massive transfusion).
Stroke (review from neurology post)
Time is brain. NCLEX® may present a stroke in an emergency context:
- FAST recognition (Face drooping, Arm weakness, Speech difficulty, Time)
- Immediate CT scan (no contrast) — differentiates ischemic from hemorrhagic
- If ischemic and within window: tPA eligibility assessment
- Stabilize BP per type (ischemic vs. hemorrhagic have different targets)
Overdose/poisoning
| Toxin | Antidote |
|---|---|
| Opioids | Naloxone (Narcan) — IM, IV, intranasal |
| Benzodiazepines | Flumazenil — short-acting; watch for re-sedation |
| Acetaminophen (Tylenol) | N-acetylcysteine (NAC) — oral or IV |
| Organophosphates (pesticides) | Atropine + pralidoxime |
| Beta-blocker overdose | Glucagon IV |
| Digoxin toxicity | Digoxin immune Fab (Digibind) |
| Warfarin | Vitamin K (slow); 4-factor PCC or FFP (rapid) |
| Heparin | Protamine sulfate |
| Methanol/ethylene glycol | Fomepizole (or ethanol); hemodialysis |
| Iron overdose | Deferoxamine |
| Lead poisoning | EDTA or DMSA (succimer) |
Emergency documentation and communication
Handoff in emergency settings
Use SBAR:
- Situation: Chief complaint and current status
- Background: History, medications, known conditions
- Assessment: What you think is happening (primary working diagnosis)
- Recommendation: What you need next
Rapid response teams (RRT)
RRTs exist to identify and respond to deteriorating patients before they reach cardiopulmonary arrest.
Criteria for RRT activation (SBAR/MEWS triggers):
- Acute change in HR, RR, SpO₂, BP
- Altered mental status from baseline
- Decrease in urine output
- Any staff member "worried" about the patient — gut instinct counts
Nurses are encouraged to call RRT proactively — earlier is always better.
NCLEX® clinical judgment focus
Triage questions test which patient to see FIRST:
Approach: Apply ABCs. The patient with an active airway or breathing problem is seen first. Among equally critical patients, the most immediately life-threatening and reversible comes first.
Common NCLEX® triage scenarios:
| Scenario | Priority |
|---|---|
| Patient A: Chest pain, diaphoresis, HR 120 | HIGH — possible MI |
| Patient B: Laceration, bleeding controlled with pressure | Moderate |
| Patient C: SOB, SpO₂ 88%, accessory muscle use | HIGHEST — active respiratory compromise |
| Patient D: Fractured arm, pain 7/10, stable VS | Moderate |
Answer: Patient C first — airway/breathing always before circulation.
FAQ
What is the difference between ESI Level 1 and Level 2 in the Emergency Department?
Level 1 = immediate life threat; patient is or will be in cardiac/respiratory arrest without immediate intervention (e.g., active CPR needed). Level 2 = high-risk situation that should be seen immediately but is not yet in arrest (e.g., severe chest pain, altered consciousness, high-risk presentation). Both are high priority but Level 1 has zero wait.
When do you tag a patient as "black" in mass casualty triage?
When the patient is not breathing even after airway repositioning (head-tilt or jaw thrust), or when injuries are incompatible with survival given current resource constraints. This is the hardest clinical decision in triage — allocating resources to survivable patients to save the maximum number of lives.
What is the first medication given for anaphylaxis?
Epinephrine 1:1,000 IM into the anterolateral thigh — always first. Antihistamines (diphenhydramine) and corticosteroids are given after epinephrine but cannot substitute for it. Delayed epinephrine is the most common cause of preventable anaphylactic death.
How is naloxone different from flumazenil?
Naloxone (Narcan) reverses opioid overdose; flumazenil reverses benzodiazepine overdose. Both are shorter-acting than the drugs they reverse, so re-sedation can occur after the antidote wears off — patients must be monitored. Flumazenil can precipitate seizures in patients with benzodiazepine dependence and should be used cautiously.
When should a rapid response team be called?
Any time a patient is showing signs of deterioration — even if the nurse cannot specify exactly what is wrong. Triggers include: RR > 25 or < 10, SpO₂ < 90% on oxygen, HR > 130 or < 45, SBP < 90 or sudden drop > 30 mmHg, acute LOC change, staff concern regardless of measured parameters. Calling RRT early saves lives.
Key takeaways
- Triage: ESI 1–5 in-hospital. START (black/red/yellow/green) for mass casualty. RPM: respiration, perfusion, mental status.
- Primary survey: ABCDE. Treat life threats in order. GCS ≤ 8 → protect airway.
- Anaphylaxis: Epinephrine IM first — always. Then O₂, fluids, diphenhydramine, steroids.
- Overdose antidotes: Opioids = naloxone. Benzos = flumazenil. Tylenol = NAC. Heparin = protamine. Warfarin = Vit K (slow) or PCC (fast).
- RRT: Call early. Gut instinct is a valid trigger.
Sources: NCSBN NCLEX-RN® 2023 Test Plan; FEMA Incident Command System Resources; CDC Emergency Preparedness and Response.
See also:
- NCLEX-RN® Disaster Nursing: MCI & CBRN Events
- NCLEX-RN® Prioritization Questions
- NCLEX-RN® Cardiac Disorders
- Take Action on NCLEX-RN®
- NCLEX-RN® Leadership Questions
NCLEX-RN® Hub: Clinical Judgment Guide
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