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

In adult CPR, the established ratio of compressions to breaths is 30:2. This means that for every 30 chest compressions delivered, 2 rescue breaths should be administered. This ratio was designed to maximize both the circulation of blood to vital organs through compressions and the oxygenation of the blood via breaths. The focus on compressions is particularly important as they are critical for maintaining blood flow to the heart and brain during cardiac arrest.

This ratio reflects best practices endorsed by organizations like the American Heart Association and the Red Cross, which emphasize the importance of high-quality compressions in achieving effective CPR. Breaths are given as a way to provide oxygen to the lungs, but the priority in adult CPR is to ensure consistent compressions. The other options listed represent incorrect ratios for adult CPR, often seen in different contexts, such as pediatric CPR, but not in adults.