What is the recommended ratio of compressions to rescue breaths in adult CPR?

In adult CPR, the recommended ratio of compressions to rescue breaths is 30:2. This means that for every 30 chest compressions performed, two rescue breaths should be provided. This ratio is designed to ensure adequate blood flow and oxygenation during a cardiac arrest situation, focusing initial efforts on compressions, which are critical for maintaining circulation until professional medical help arrives or until the person begins to show signs of recovery.

The 30:2 ratio is established based on guidelines that emphasize the importance of high-quality chest compressions at an adequate rate and depth. By performing 30 compressions before giving rescue breaths, rescuers can maintain blood circulation more effectively, as continuous compressions are vital for keeping oxygen moving to vital organs. The two rescue breaths then provide necessary oxygenation to the lungs.

This approach has been corroborated by evidence and teaching from organizations such as the American Heart Association, which provides updated guidelines for CPR practices. The simplified ratio allows for better retention of skills during training and practical application in emergencies.