Triage Is Not Classification — It's the First Resource Allocation Decision

The Moment a Color Becomes a Commitment

Everyone in disaster medicine knows the four triage colors:

🔴 RED — Immediate: treat first
🟡 YELLOW — Urgent: needs priority treatment
🟢 GREEN — Minor: treatment can wait
⚫ BLACK — Expectant: death is anticipated

Most people treat this as "classification" — sorting patients into four piles. In practice, the moment you apply the color label, you've already made a chain of resource-allocation decisions:

RED → into the critical zone → an operating bed assigned immediately → medications dispensed first
YELLOW → into the moderate zone → placed in the monitoring queue → reassessed on a schedule
GREEN → into the minor zone → the waiting area → treatment can wait
BLACK → no treatment resources allocated — the hardest decision in medicine

Triage is not classification. It is the first input to resource allocation.

From Battlefield to Registration: Automatic Mapping

xGrid receives MEDEVAC requests from the battlefield. MEDEVAC has its own priority system, separate from the in-hospital triage system.

The system automatically completes a dual mapping:

MEDEVAC Priority	Triage Color	Registration Priority
Urgent Surgical	RED	Highest
Urgent	RED	Highest
Priority	YELLOW	Medium
Routine	GREEN	Normal
Convenience	GREEN	Normal

When a MEDEVAC request arrives, the system does five things at once: creates the patient record, creates the registration, records vital signs, creates the clinical handoff record, and writes an event-log entry.

What the nurse sees is a new patient already sitting in her queue — already colored, already carrying vitals, already carrying a handoff. No need to ask, again, "what happened to you?"

Nursing Triage: A Fifteen-Second Structured Assessment

The battlefield's automatic mapping is rough. Once the patient reaches the medical station, the nurse performs formal triage. xGrid's triage interface is built for speed under pressure:

Large buttons — four color buttons, sized so precision movements aren't needed. Hands shake under stress; large touch targets cut down on mis-taps.

Real-time GCS calculation — sliders for the three Glasgow Coma Scale components (Eye 1–4, Verbal 1–5, Motor 1–6), with the total displayed live. The nurse never has to add it up herself.

A full set of vitals — blood pressure, heart rate, respiratory rate, SpO2, temperature, pupil size and reactivity, pain score. All optional — during a mass casualty event a nurse can submit just the color and come back for vitals later.

Fifteen seconds, start to finish. What comes out of it is a structured triage assessment that, from that point on, can be searched, analyzed, and audited.

Why Not Let an Algorithm Assign the Color?

START (Simple Triage and Rapid Treatment) is a familiar triage decision tree: Can the patient walk? Are they breathing? What's the respiratory rate? Is there a radial pulse? The color gets assigned automatically from the answers.

We chose not to build automatic classification in. Three reasons:

START is built for non-clinicians. It exists so firefighters and volunteers can do a rough sort in seconds. A nurse's clinical judgment beats a decision tree.
Algorithms manufacture false certainty. An algorithm-assigned GREEN tells everyone downstream "this patient is fine." But the nurse may have noticed something the algorithm can't see — skin color, anxiety level, the severity implied by the mechanism of injury.
An override step is friction you don't need. If the algorithm says GREEN but the nurse thinks YELLOW, she needs an extra step to "override" it. Under pressure, one more step is one more reason to give up on it.

xGrid's approach: give the nurse a complete set of assessment tools, let her record objective data quickly, and let her decide the color. The system trusts human judgment — while making sure the basis for that judgment is fully on record.

Unlimited Re-Triage

A patient's condition changes. A GREEN patient can suddenly deteriorate in the waiting area.

xGrid allows unlimited re-assessment — change the color, and it records who changed it and when. The system automatically tracks the trajectory of change:

Time	Color	Reason
08:30	GREEN	Auto-mapped from the battlefield
09:15	YELLOW	Nurse: BP dropping to 90/60
10:02	RED	Nurse: consciousness change, GCS dropped to 12

There's no special "escalate" or "downgrade" workflow. Changing the color is just changing the color.

Zone Capacity

The triage color determines which zone a patient enters. Zones have capacity limits:

Zone	Capacity	Purpose
Triage Area	20	Initial assessment
Critical Zone	10	RED — immediate treatment
Moderate Zone	30	YELLOW — priority treatment
Minor Zone	50	GREEN — delayed treatment
Observation	20	Symptom monitoring and isolation

When a patient is moved to a zone, the system checks capacity. Is the critical zone full (10/10)? You can't add another patient — a stabilized RED has to move to observation first, to free up a bed.

That's why triage is "resource allocation," not "classification." Applying a RED label doesn't just mean "this person is severe." It means "I need to occupy a bed in the critical zone." When the beds are full, you're not facing a classification problem — you're facing a resource problem.

Mass Casualty Mode

When a surge of casualties arrives, the system offers two mechanisms to keep pace:

Batch triage — up to 100 patients at once. Built for the initial rapid sort: apply colors first, do the detailed assessment patient by patient afterward.

Throughput cap — no more than 50 intakes per minute. This isn't a system bottleneck — it's a quality safeguard. However fast things move, data quality can't be allowed to break down.

Triage Distribution as a Resource Signal

The real-time triage distribution is the most direct resource-planning indicator a commander has:

A high proportion of RED → more operating rooms and ICU beds needed
A high proportion of YELLOW → more monitoring equipment and nursing staff needed
A high proportion of GREEN → a bigger waiting area needed
Any BLACK appears → a psychological support team is needed

Every one of these macro-level decisions traces back to the single color button a nurse presses on her phone. That button is not just a label. It is the first domino in a resource-allocation cascade.