6.1 EMS Operations Overview

6.1 Incident Command and Mass-Casualty Triage

EMS Operations is roughly 8-12% of the NREMT Paramedic blueprint, and the highest-yield piece is how you function when one patient becomes many. A multiple-casualty incident (MCI) is any event whose patient count, severity, or resource demand temporarily exceeds the responding crew's capacity. The exam tests whether you can shift from "do everything for this one patient" to "do the greatest good for the greatest number" — a deliberate change in mindset, not a failure of compassion.

NIMS and the Incident Command System

The National Incident Management System (NIMS) is the FEMA framework that lets local, state, tribal, federal, and private agencies work together regardless of an incident's cause, size, or complexity. Its operational backbone is the Incident Command System (ICS) — a standardized, scalable management structure. Key exam concepts:

• Unified command: one Incident Commander (IC) (or a unified command of agency leads) owns overall objectives.
• Unity of command: every responder reports to exactly one supervisor — never two.
• Span of control: one supervisor manages 3-7 subordinates (5 is ideal); when it exceeds that, the structure expands.
• Common terminology replaces agency-specific codes so radio traffic is understood by all.

The five ICS functional areas are Command, Operations, Planning, Logistics, and Finance/Administration. EMS usually sits under Operations as an EMS Branch subdivided into Triage, Treatment, and Transport groups (plus a Staging area and, when hazardous, Rehab and Safety). On the exam, when a stem describes an expanding incident, the right answer is almost always to establish or integrate into command — not to keep treating in isolation.

START Triage: RPM-30-2-Can Do

START (Simple Triage And Rapid Treatment) is the dominant adult primary-triage tool in U.S. EMS. The goal is to categorize each patient in under 60 seconds using only respirations, perfusion, and mental status — the mnemonic RPM-30-2-Can Do.

1. First move: announce that everyone who can walk should get up and move to a designated area. Anyone who walks is tagged GREEN (Minor).
2. For non-walking patients, assess in order: Respirations, Perfusion, Mental status.

The only interventions allowed during START are the two that buy time without stopping the line: open/reposition the airway and control major hemorrhage (and lifting legs). If a non-breathing patient starts breathing after a head-tilt, they are RED, not BLACK.

Worked example

A blast victim has spontaneous respirations, capillary refill of 3 seconds, and follows commands. Refill over 2 seconds = perfusion failure, so this patient is RED (Immediate) — even though mental status is intact. A common exam trap is to call this Yellow because the patient is talking; the algorithm stops at the first abnormal RPM finding.

SALT Triage and the Paramedic's MCI Role

SALT (Sort, Assess, Lifesaving interventions, Treatment/transport) is the CDC/national-guideline model designed to be all-hazards and all-ages. It adds a global Sort step (voice command: those who walk are lower priority; those who can wave/purposefully move are next; the still and life-threatened are assessed first) and folds in quick lifesaving interventions during triage: control major hemorrhage, open the airway (and give 2 rescue breaths in children), perform needle decompression, and give auto-injector antidotes.

SALT adds an Expectant category distinct from Dead, recognizing patients who are unlikely to survive given available resources but may still receive comfort care.

Your role as the paramedic

At an MCI you are assigned to a group (Triage, Treatment, or Transport) and you work that role. As Triage, you tag fast and keep moving — resist the urge to stop and resuscitate one Red patient. In Treatment, you provide focused care in the casualty collection point. In Transport, you track destinations and balance loads so one ED is not overwhelmed. Documentation at an MCI is abbreviated (the triage tag is the record). Re-triage occurs as patients move between areas because conditions change.

The exam reliably rewards the answer that keeps you inside the command structure, preserves span of control, and serves the population — not the single sickest individual.

Disaster phases and the standard of care

Understand that an MCI temporarily changes how care is delivered. In day-to-day EMS, you give maximal care to each individual; in a declared disaster, the operative standard becomes doing the greatest good for the greatest number with available resources. This is why an apneic patient who does not breathe after a single airway-opening attempt is tagged Black at an MCI even though that same patient would receive full resuscitation on a routine call — committing a crew to one unsalvageable patient denies care to several salvageable ones.

The shift is deliberate, protocol-driven, and ends when resources catch up to demand and patients return to individual care.

Communications and accountability

Good MCI command depends on disciplined radio traffic and personnel accountability. Use plain language and clear unit identifiers, give periodic situation reports to command, and track which crews are operating in which area so no one is unaccounted for. The IC issues an incident action plan with objectives for each operational period, and resources move through Staging before assignment so command always knows what is available.

When the exam stem describes confusion over who is in charge or freelancing crews, the corrective answer is to formalize command, assign clear roles, and route resources through staging — restoring the ICS structure that keeps both patients and responders safe.