Snoring, Gasping, Gray: The Dispatcher's Call
At 19:42 a 58-year-old man collapses mid-stride on a treadmill at a fitness center. Bystanders move him to the floor. The 911 caller, a personal trainer with no first-aid certification, reports: "He's breathing, but it's snoring and gasping, maybe every 5 seconds. I don't want to hurt him." A second bystander is running to an AED mounted about 90 seconds away by the front desk. At 19:44 the gasping has slowed and the lips look gray. The nearest ALS unit is 7 minutes out; a fire engine carrying an AED is 4 minutes out. The dispatcher has the scripted CPR protocol open on her screen and can hear the ambient noise of the gym.
1. How should the dispatcher classify what the caller is hearing, and what should she say in the next 30 seconds?
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The description (slow, snoring, irregular gasps every few seconds, no normal breaths between them) is agonal breathing, which is treated as not breathing. Roughly 40% of adults in early cardiac arrest show agonal gasps, and it is one of the most common reasons CPR is delayed.
She should:
- Say plainly: "He is not breathing normally. He is in cardiac arrest. I need you to start chest compressions right now while I stay on the line."
- Not accept "he's breathing" as a reason to withhold CPR, and not ask the untrained caller to hunt for a pulse.
- Give scripted, single-step instructions: phone on speaker, heel of hand in the center of the chest, second hand on top, push hard and fast, let the chest come all the way up.
- Confirm someone is getting the AED and that the front door is unlocked/propped for EMS.
The gasping slowing at 19:44 is deterioration, not improvement, and does not change the plan.
2. The trainer asks whether he can skip the mouth-to-mouth. What is the defensible answer, and what details would change it?
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Compression-only CPR is appropriate here and should be started immediately. For an untrained (or unwilling) lay rescuer responding to a witnessed sudden adult collapse, the presumed cause is a shockable primary cardiac arrhythmia, and the oxygen already in the blood is enough for the first several minutes. Compressions buy time; interrupting them to attempt unfamiliar ventilations usually costs more than it gains.
Quality targets to coach: rate 100–120/min, depth at least 5 cm (2 in), full recoil, minimal interruptions, and continue until the AED or EMS takes over.
What would change the answer toward 30:2:
- Asphyxial arrest - drowning, choking, opioid overdose, smoke inhalation, or a child/infant: the blood is already deoxygenated, so ventilations matter early.
- The rescuer is trained and willing.
- An AED arrives: apply pads with the shortest possible pause and follow prompts, resuming compressions immediately after any shock.
3. At 19:47 the patient takes a loud spontaneous gasp and the trainer wants to stop compressions and wait for EMS. How should the dispatcher respond?
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Continue compressions. An isolated gasp is not a sign of return of spontaneous circulation (ROSC); it is a brainstem reflex that commonly appears during effective CPR and often increases as perfusion improves.
Reasons to stop compressions are narrow:
- The patient becomes clearly responsive - purposeful movement, eye opening, speaking, or sustained normal breathing.
- EMS or another trained provider physically takes over.
- The rescuer is physically unable to continue (then swap rescuers, don't stop).
Lay rescuers should not interrupt to re-check a pulse; the AED's 2-minute analysis cycle is the interruption.
If he does become responsive and breathing normally, stop compressions, place him in a recovery position if no suspected spinal injury, leave the pads attached, keep monitoring breathing continuously, and be ready to resume if he deteriorates. The AED should stay on and powered until EMS arrives.