According To The Start Triage System

According to the START Triage System

The START (Simple Triage and Rapid Treatment) triage system is a widely adopted method for quickly sorting victims during mass‑casualty incidents, enabling first responders to identify who needs immediate life‑saving care, who can wait, and who is beyond help. By using observable physiological criteria—respiration, perfusion, and mental status—START provides a repeatable, objective framework that can be taught to EMTs, firefighters, police officers, and even lay volunteers in a matter of hours. Understanding how START works, why it was developed, and how to apply it correctly is essential for anyone involved in emergency management or disaster response.

Core Principles of START Triage

START was created in the early 1980s by Hoag Hospital and the Newport Beach Fire Department in California to address the chaotic scene of large‑scale emergencies such as earthquakes, terrorist attacks, or transportation disasters. Its design rests on three fundamental ideas:

1. Speed over perfection – Triage must be completed in under 60 seconds per patient to keep the overall process moving.
2. Objective physiologic markers – Rather than relying on subjective judgments, responders assess breathing, radial pulse (or capillary refill), and ability to follow simple commands.
3. Clear color‑coded categories – Each victim receives a tag (red, yellow, green, or black) that instantly communicates priority to all personnel on scene.

These principles allow START to function effectively even when resources are stretched thin and communication is limited.

The Four Triage Categories

Note: In some jurisdictions, the “expectant” category is used only when definitive care is impossible; otherwise, black‑tagged patients receive palliative care.

Step‑by‑Step Application of START

1. Scene Safety and Initial Survey

   • Ensure the area is safe for responders (hazards, structural instability, ongoing threats).
   • Identify the number of casualties and call for additional resources if needed.

2. Global Sorting (Walking Wounded)

   • Loudly announce: “Anyone who can walk, come to me.”
   • Those who move to the designated area are immediately tagged green (minor).
   • This step removes the majority of low‑priority patients, reducing the workload for detailed assessment.

3. Individual Assessment (Non‑ambulatory Victims)
   For each remaining victim, perform the following rapid checks in order:

   a. Respiration

   • Look for chest rise, listen for air movement.
   • If the patient is not breathing, open the airway (head‑tilt/chin‑lift or jaw‑thrust).
   • If breathing does not resume after two rescue breaths, tag black (expectant).
   • If breathing is present, count breaths for 15 seconds and multiply by four to get breaths per minute.
   • >30 or <10 breaths/min → tag red (immediate).

   b. Perfusion - Check for a radial pulse (or capillary refill in infants/children).

   • No radial pulse or capillary refill >2 seconds → tag red.
   • If pulse present and refill normal, proceed to mental status.

   c. Mental Status / Ability to Obey Commands

   • Give a simple command: “Squeeze my hand” or “Open your eyes.”
   • Unable to obey → tag red.
   • Able to obey → tag yellow (delayed).

4. Tagging and Documentation

   • Apply the appropriate colored triage tag to the victim’s wrist or clothing.
   • Record the time of triage, observed vitals, and any immediate interventions performed (e.g., airway opening, hemorrhage control).
   • Move the patient to the corresponding treatment area (red, yellow, green) or morgue/expectant zone.

5. Re‑triage as Needed

   • Patients’ conditions can change; repeat the START assessment every 5‑15 minutes or after any significant intervention.
   • Up‑triage (e.g., from yellow to red) or down‑triage (red to yellow) is common and should be documented.

Scientific Rationale Behind the START Criteria

The three physiologic parameters chosen for START are rooted in trauma physiology and have been validated in multiple studies:

• Respiratory Rate

  • Hyperventilation (>30/min) often signals pain, anxiety, or early shock from hemorrhage or tension pneumothorax.
  • Hypoventilation (<10/min) suggests central nervous system depression, drug overdose, or impending respiratory failure.
  • Both extremes correlate with increased mortality and thus warrant immediate attention.

• Perfusion (Radial Pulse/Capillary Refill)

• Absence of a radial pulse or delayed capillary refill indicates poor peripheral perfusion, often due to hypovolemia, shock, or cardiac dysfunction. These patients have a high risk of deterioration and require rapid intervention.

• Mental Status (Obey Commands)

  • The ability to follow simple commands reflects intact cerebral perfusion and oxygenation. Loss of this function suggests severe brain injury, hypoxia, or profound shock, necessitating urgent care.

These parameters are quick to assess, require minimal equipment, and have been shown to correlate with survival outcomes in mass casualty settings. The START system’s simplicity allows non-medically trained responders to participate effectively, increasing surge capacity during disasters.

Conclusion

The START triage system is a cornerstone of emergency mass casualty management, providing a structured, evidence-based approach to prioritizing care when resources are overwhelmed. By focusing on respiratory status, perfusion, and mental status, responders can rapidly identify those in most urgent need of intervention. While START is not without limitations—such as its reduced accuracy in pediatric patients or those with chronic conditions—it remains the most widely taught and implemented system globally. Mastery of START, combined with regular drills and inter-agency coordination, ensures that communities are better prepared to respond to large-scale emergencies, ultimately saving more lives when every second counts.

Implementation and Training Considerations

Effective deployment of START requires structured training and clear protocols. responders must master rapid assessment techniques while maintaining situational awareness. Key training elements include:

• Simulation Drills: Regular mass casualty exercises to reinforce decision-making under pressure.
• Role Clarity: Defining responsibilities (e.g., taggers, transporters, reassessors) to prevent bottlenecks.
• Communication Protocols: Standardized radio reports and handoff procedures to avoid errors.
• Pediatric Adaptations: Modified criteria (e.g., using respiratory rate thresholds adjusted for age) are essential but often require specialized training.

Integration with Other Triage Systems

While START excels in initial sorting, it often interfaces with more nuanced systems like SALT (Sort, Assess, Lifesaving Interventions, Treatment/Transport) for prolonged incidents. START’s rapid categorization stabilizes the scene, allowing SALT’s detailed assessments to follow. This layered approach ensures resources align with evolving patient needs.

Challenges and Limitations

Despite its efficacy, START has constraints:

• Resource Dependency: Accuracy hinges on adequate personnel and supplies; shortages compromise triage integrity.
• Chronic Conditions: Patients with comorbidities (e.g., diabetes, heart failure) may present atypically, risking misclassification.
• Psychological Impact: Tagging patients into "expectant" categories can cause moral distress among responders, necessitating psychological support.
• Environmental Factors: Extreme weather or hazardous materials may alter assessment protocols.

Technological Advancements

Modern adaptations enhance START’s capabilities:

• Electronic Triage Tags: RFID-enabled tags track patient movement and vital signs in real time.
• Mobile Applications: Apps like Triage SaaS digitize assessments, reducing documentation errors.
• AI-Assisted Tools: Algorithms analyzing crowd-sourced data or thermal imagery can supplement visual surveys.

Conclusion

The START triage system remains an indispensable tool in mass casualty incidents, transforming chaos into a structured response. Its simplicity, rooted in validated physiological parameters, empowers both medical and non-medical personnel to prioritize life-saving interventions effectively. While challenges persist—particularly in pediatric care and resource-limited settings—ongoing training, technological integration, and inter-agency collaboration mitigate these risks. Ultimately, START’s enduring relevance lies in its ability to maximize survival during critical moments when time and resources are finite. By mastering this system, communities build resilience, ensuring that when disaster strikes, the most vulnerable receive the care they need to survive.