CPR Compression to Breath Ratio: Adult Guidelines
For adult CPR with a single rescuer, the recommended compression-to-ventilation ratio is 30:2.
- 30 chest compressions (depth ≥2 in / 5 cm, rate 100–120/min)
- 2 rescue breaths (each ~1 second, visible chest rise)
For two rescuers, ratio remains 30:2 but with role switching every 2 minutes to prevent fatigue. High-quality compressions with minimal pauses are the priority.
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