It’s 9:17 p.m., and a 27-year-old man in a sun-faded concert tee keeps saying, “I’m fine,” while sweat beads on his upper lip and his phone screen flashes dead in his hand. Around him, the triage tent is a blur of dust, shouting, and ambulance lights; one teenager is clutching an ankle, another is staring blankly into the middle distance, and a woman nearby is vomiting into a trash bin. The crowd is larger than the street outside the hospital has ever been. The question isn’t what the diagnosis is. It’s who gets moved first, and who can safely wait.
— What’s your move? Read on.
Before you read
- What do you do first when the scene itself may be the hazard?
- Which patients are truly unstable versus just loud, anxious, or injured?
When to Think of It
Think mass gathering medicine when you see a sudden surge: concert, marathon, parade, protest, disaster shelter, sports event, pilgrimage, or school event with clustered illness/injury. Triggers include heat illness, intoxication, crowd crush, panic, trauma, communicable disease, and delayed access to care.
Sick or Not Sick
The one call that matters most: Is there an immediate life threat that requires bypassing routine triage and moving to resuscitation or scene-level extraction now? If yes, that patient becomes a priority one transport or ED resuscitation. If no, the patient enters the triage stream and gets reassessed repeatedly because status changes fast.
The First Fifteen Minutes
- Scene safety / incident command activation → establish zones, stop traffic flow, request additional EMS and ED resources, because a chaotic scene kills rescuers and delays the sick.
- Directing bystanders / basic first aid → simple wound pressure, sitting/lying overheated patients down, oral fluids if safe, because low-acuity care should not consume critical resources.
- Rapid triage with a system such as START or JumpSTART → immediate walk-by assessment, because objective sorting prevents emotion-driven decisions.
- Hypoglycemia or altered mental status with glucose low/unknown in a symptomatic patient → dextrose 25 g IV (e.g., D50W 50 mL IV) in adults, because reversibility is fast and high-yield; if no IV, glucagon 1 mg IM/IN while access is obtained.
- Agitated patient threatening self/others and nonpharmacologic control fails → haloperidol 5–10 mg IM or droperidol 5–10 mg IM (or per local protocol), because chemical sedation can make triage and transport possible; monitor QT and airway. Dose variability exists—check institutional protocol if uncertain.
- Severe heat illness / hyperthermia with altered mentation → aggressive external cooling (ice-water immersion if feasible; otherwise evaporative + ice packs), because temperature reduction is the definitive life-saving move.
- Shock physiology on the scene → large-bore IV/IO access and balanced isotonic fluids while arranging priority transport, because perfusion support buys time, not cure.
- Suspected anaphylaxis → epinephrine 0.3–0.5 mg IM (1 mg/mL solution) immediately, because it reverses airway edema and distributive shock.
- Oxygen only if hypoxemic or in respiratory distress → titrate to need, because indiscriminate oxygen is not the intervention; ventilation and transport are.
Definitive Care & Disposition
Definitive care is system coordination: hospital destination decisions, mutual aid, surge staffing, communications, and repeated triage as the event evolves. Admit or transfer patients based on physiology, not complaint severity. Low-acuity patients may be treated and released, but anyone with persistent abnormal vitals, altered mentation, exertional syncope, heat stroke, crush injury, or significant trauma needs ED evaluation and often observation or admission. Communicable disease concerns require isolation pathways and public health notification.
How This One Kills
The fatal error is treating triage as one-and-done. A patient who looks “okay” during the first pass can deteriorate seconds later from heat stroke, occult bleeding, intoxication, or crush physiology while staff focus on the loudest complaint.
The Differential — What Else Looks Like This
- Panic attack — tachypnea and fear without objective hypoxia, hypotension, or altered perfusion; confusing it with shock delays lifesaving transport.
- Intoxication — slurred speech and ataxia can hide head injury or heat illness; missing the real injury leads to deterioration in the crowd or after discharge.
- Exertional heat exhaustion — normal mentation and stable core physiology vs heat stroke; confusing the two risks missing a cooling emergency.
- Simple musculoskeletal injury — isolated pain/swelling with stable vitals; overtriage wastes scarce transport and ED capacity.
The Second-Day Story
In older adults, children, or partially treated patients, the scene may be deceptive: they may not look dramatic, but they decompensate quickly. Heat illness may present as confusion, weakness, or collapse rather than obvious hyperthermia; trauma may be hidden by intoxication, adrenaline, or crowd noise. The clue is mismatch between appearance and physiology—tachycardia, hypotension, altered mentation, abnormal temperature, or inability to ambulate should override “looks okay.”
Back to Our Patient
Back to our patient: the 27-year-old in the concert tee is not “just sweaty” — he’s in a mass gathering surge with potential heat illness, intoxication, or occult trauma. On rapid triage, his mental status, ambulation, skin temperature, and vital signs decide the fork: if he’s altered, hypotensive, or unable to cool down, he moves immediately to resuscitation and active cooling/transport; if he’s alert, normotensive, and simply exhausted, he stays in the triage stream with reassessment and hydration. The key is repeated objective checks, not reassurance by appearance. He ends up either a high-priority transport if unstable or a lower-acuity discharge/observe pathway if physiology remains normal.
Patient Presentation to Attending
How you’d present this patient on the floor — tight, pertinent positives and negatives, no rambling
“27-year-old man at a crowded concert with dizziness and feeling overheated. He’s been in line for several hours, has not been drinking much, and now looks flushed and sweaty; he denies chest pain, focal weakness, trauma, or loss of consciousness. On exam he’s awake, speaking in full sentences, tachycardic, and able to ambulate, with no focal neuro deficits and no obvious injuries. Vitals show mild tachycardia but no hypotension or hypoxia, and his point-of-care glucose is normal. My concern is heat illness versus intoxication versus occult trauma in a mass-casualty-style surge, but he currently has no red flags for immediate resuscitation. I’m going to move him through formal triage, get him cooled and orally rehydrated if he stays stable, and reassess vitals and mental status repeatedly; if he worsens, he goes straight to higher-acuity evaluation.”
Study Directive
- Draw a 3-zone mass gathering layout from memory: hot/warm/cold zones, then place triage and transport flow on it.
- Practice START and JumpSTART on five mock patients and time yourself to sort them in under 60 seconds each.
- Write a one-page checklist for concert/marathon triage: heat illness, intoxication, trauma, hypoglycemia, anaphylaxis, communicable disease.
- Rehearse a 30-second radio report for surge conditions: patient count, acuity, resource needs, and transport destinations.
- Review your local EMS special events plan and identify who activates incident command, who tracks patients, and who coordinates destination distribution.