Effective triage can be completed in under 2 minutes and is the single most important step in emergency veterinary medicine. The goal is not to diagnose but to categorize patients by the urgency of their need for medical intervention. A structured triage system ensures that the sickest patients are seen first, regardless of arrival order. The Triage/Emergency Specialist can assist with rapid decision-making during high-volume emergency situations.
The primary survey is a rapid, systematic assessment performed within the first 60 seconds of patient contact. It identifies immediately life-threatening conditions that require intervention before any further evaluation.
A – Airway: Is the airway patent? Look for obstruction (foreign body, swelling, blood, vomitus), stridor, or stertor. If obstructed, clear immediately with suction, digital sweep, or emergency intubation. Brachycephalic breeds are at highest risk.
B – Breathing: Is the patient ventilating? Assess respiratory rate, effort, and pattern. Look for paradoxical breathing (chest collapses on inspiration), open-mouth breathing in cats (always abnormal), absent breath sounds on auscultation (pneumothorax, pleural effusion), or severe dyspnea. Provide supplemental oxygen immediately for any patient in respiratory distress.
C – Circulation: Assess perfusion. Check mucous membrane color (pink = normal; white = shock/hemorrhage; blue = cyanosis; brick red = vasodilation/SIRS), capillary refill time (normal 1-2 seconds; >2 seconds = poor perfusion), pulse quality (weak/thready = hypotension), and heart rate. Establish IV access for any patient with circulatory compromise.
D – Disability (Neurological): Rapid neurological assessment. Evaluate mentation (alert, depressed, obtunded, stuporous, comatose), pupil size and symmetry, and ability to ambulate. Seizure activity requires immediate intervention.
E – Exposure/Environment: Perform a rapid whole-body scan for external hemorrhage, open fractures, penetrating wounds, burns, or hypothermia/hyperthermia. Control any active hemorrhage with direct pressure.
Based on the primary survey, patients are assigned to one of three triage categories. This categorization determines the order and immediacy of treatment.
| Category | Definition | Response Time | Examples |
|---|---|---|---|
| Emergent (Red) | Immediate life-threat; death likely without rapid intervention | Immediate (0 min) | Cardiac arrest, respiratory failure, GDV, active hemorrhage, anaphylaxis, seizures, urethral obstruction (cat) |
| Urgent (Yellow) | Serious condition requiring prompt attention; stable for brief period | 15-30 minutes | Open fractures, moderate dyspnea, snake envenomation, dystocia, moderate dehydration, toxin ingestion (<2 hrs) |
| Non-Urgent (Green) | Stable; requires evaluation but no immediate life-threat | 30-120 minutes | Chronic vomiting/diarrhea, skin lacerations, lameness, ear infections, minor allergic reactions |
Once the primary survey is complete and any life-threats are addressed, the secondary survey provides a more thorough assessment. This includes: complete vital signs (temperature, pulse, respiration, blood pressure, SpO2), a focused history from the owner (AMPLE: Allergies, Medications, Past medical history, Last meal, Events leading to presentation), a nose-to-tail physical examination, point-of-care diagnostics (PCV/TS, blood glucose, lactate, blood gas, urinalysis), and focused ultrasound (AFAST/TFAST) if indicated.
The secondary survey should be completed within 15-30 minutes for emergent patients (concurrent with stabilization) and within 60 minutes for urgent patients.
Effective communication during triage is critical. The SBAR framework ensures clear, concise handoff to the attending veterinarian:
S – Situation: "I have a 7-year-old intact male Golden Retriever presenting for non-productive retching and abdominal distension for 2 hours."
B – Background: "No previous medical history, last ate 4 hours ago, no access to toxins."
A – Assessment: "Primary survey: airway patent, tachypneic, tachycardic (180 BPM), pale mucous membranes, CRT 3 seconds, abdomen tympanic on percussion. Triaged as emergent. Suspect GDV."
R – Recommendation: "Requesting immediate evaluation, IV access established bilaterally, radiographs ordered, and surgical team on standby."
Certain vital sign findings during triage should immediately escalate a patient to emergent status regardless of the presenting complaint:
- Heart rate >200 BPM (dog) or >260 BPM (cat) or <40 BPM (either)
- Respiratory rate >60 (dog) or >80 (cat) with increased effort
- Temperature >41°C (106°F) or <36°C (97°F)
- SpO2 <90% on room air
- Blood glucose <60 mg/dL or >500 mg/dL
- Lactate >4 mmol/L
- Absent or severely weak pulses
Warning: Triage is dynamic. A patient categorized as non-urgent at presentation can deteriorate rapidly. Reassess any waiting patient at least every 15-30 minutes, and instruct owners to alert staff immediately if their pet's condition changes. A blocked cat that is urinating small amounts at triage may become completely obstructed within an hour.
Use the Vital Signs Reference to quickly confirm normal ranges during triage, and the CPR Emergency Drug Calculator for weight-based emergency drug dosing in cardiac arrest situations.
- Complete ABCDE in under 60 seconds — identify life-threats before any other assessment.
- Categorize as emergent, urgent, or non-urgent — this determines treatment priority, not arrival order.
- Use SBAR for handoff communication — structured communication prevents critical information loss.
- Triage is dynamic and ongoing — reassess waiting patients every 15-30 minutes for deterioration.
- Point-of-care diagnostics support triage — PCV/TS, glucose, lactate, and AFAST/TFAST provide rapid decision data.