High-performance CPR for paramedics: the choreography that protects compression time

#Watch the hands, not the people

Next time you review a resuscitation, real or simulated, try an exercise every paramedic who cares about high-performance CPR should do at least once. Ignore what everyone is saying and watch only the patient's chest. Count every moment nobody's hands are on it.

The pauses are almost never where crews expect. The rhythm check that ran long because nobody had the pads ready. The seconds lost while the team moved the patient off a bed. The airway attempt that "only needed a moment." Each one feels reasonable at the time. Together they quietly drain blood flow from the brain and heart.

High-performance CPR for paramedic crews isn't really about compressing harder. It's about choreography: who does what, where they stand, and how the team moves through each two-minute cycle without stopping the one thing that keeps the patient perfused.

#What high-performance CPR means for paramedic crews

The core compression standards are familiar and widely published. Guidelines commonly describe a rate of 100 to 120 per minute, adequate depth, full chest recoil between compressions, avoiding excessive ventilation and keeping interruptions as short and rare as possible. The AHA's 2013 consensus statement on CPR quality, led by Meaney, sets these out alongside chest compression fraction, the proportion of arrest time spent compressing.

Individually, most paramedics can hit those numbers on a manikin. The difficulty is keeping them up across a 30-minute resuscitation in a cramped hallway with a monitor, a bag, an airway, drugs, a family and a stretcher competing for attention. That's a team problem, and it needs a team solution. Always follow your service's medical directives and the current provincial ALS/BLS standards for the specifics.

#The pit-crew model

The pit-crew idea borrows from motorsport: everyone knows their job before the car stops. In a cardiac arrest that means roles are assigned before you reach the patient, or within seconds of arrival, and each person has a position around the body.

A typical layout, adapted to how many responders you usually have:

• Compressors. One or two people rotating on compressions, kneeling on either side of the chest so the swap is instant.
• Airway. At the head, managing ventilation and later any advanced airway, without stopping compressions to do it.
• Monitor and defibrillation. Pads on early, managing rhythm checks and shocks, often also keeping the two-minute clock.
• Team lead. Ideally hands-off, watching quality, thinking ahead, managing drugs and time, and talking to the family when needed.

With a two-person crew, roles stack and the lead is usually also doing something. First responders and fire crews change the maths again. The principle holds either way: decide roles early and explicitly, not by drift.

#Where the time actually goes

When crews review their arrests, the same patterns tend to come up:

1. Pre-shock pauses. Stopping compressions, then waiting for the monitor to charge. Charging during compressions and resuming immediately after the shock shortens this pause.
2. Rhythm checks that turn into discussions. The check should be brief. Talk about the plan before the pause, not during it.
3. Procedures on a still chest. Airway placement, IV or IO access and moving the patient can often be done while compressions continue.
4. Late compressor swaps. Fatigue degrades depth and recoil before the compressor feels it. Guidelines commonly suggest swapping around every two minutes, at the rhythm check, so the change costs no extra time.
5. Packaging and extrication. Moving a patient in arrest is one of the biggest sources of interruption. Planning the move, and deciding when to move, deserves as much thought as any drug.
6. Unclear leadership. When nobody owns the clock, cycles drift and pauses lengthen.

None of these are knowledge problems. Every medic knows compressions matter. They're coordination problems, and coordination improves with rehearsal.

#Pausing on purpose

A useful habit is to treat every pause as a mini-briefing. Shortly before the two-minute mark, the lead or monitor person announces what happens next: "Coming up on a rhythm check. Charging during compressions. Next compressor ready on the left." Everyone knows their move before hands come off the chest.

Closed-loop communication helps here. A clear instruction, a short acknowledgement and confirmation when it's done stop two people from doing the same job, and nobody's left waiting for something that isn't coming.

It also helps to name the decision points in advance. When will the team consider an advanced airway? When does the conversation about moving the patient happen? Who calls online medical control if termination of resuscitation is being considered under your directives? Crews that settle those questions early spend less time debating them over a still chest, and the lead can keep attention on quality rather than logistics.

#For training leads

If you want better arrest performance, train the crew, not just the individual:

• Run full-team scenarios with the people who actually respond together, including fire or first responders where possible.
• Practise in realistic spaces. A bathroom floor or stairwell exposes problems a classroom never will.
• Use feedback devices or monitor data, where your service has them, to show crews their real compression fraction and pause lengths. Seeing the numbers changes behaviour faster than lectures.
• Debrief the choreography. Ask where the pauses were and why, not just whether the right drugs were given.
• Repeat short drills. A five-minute "first two cycles" drill run often does more than an occasional long megacode.

Decision practice between drills matters too. Scenario tools like Imedica let medics rehearse the lead's job, such as anticipating the next cycle, choosing when to move and recognizing when a pause is about to run long, so the thinking is automatic when the hands are busy.

#The takeaway

The best compressor in the world can't help a patient during a pause. High-performance CPR comes from crews that assign roles early, keep compressions going through everything else, plan each pause before it starts and swap compressors on time. Rehearse it together until it feels boring, because boring is what good choreography looks like at 3 a.m.

Drafted for Imedica Field Notes. Physician review of this article is pending.