What is the recommended compression-to-ventilation ratio for adult CPR?

The recommended compression-to-ventilation ratio for adult CPR is 30:2. This means that for every 30 chest compressions administered, 2 rescue breaths should be given. The emphasis on this specific ratio is rooted in research suggesting that a higher number of compressions to ventilations may improve the chances of survival in cardiac arrest scenarios.

During CPR, the primary goal is to maintain blood circulation to vital organs, particularly the brain and heart, which is achieved through effective chest compressions. The 30:2 ratio is designed to maximize the number of compressions, which secondly helps to ensure adequate oxygenation when ventilations are provided. This approach facilitates a balance between maintaining circulation and providing oxygen, minimizing interruptions in compressions to prioritize the most critical aspect of resuscitation: maintaining blood flow.

In contrast, other ratios mentioned are outdated or not recommended for adult victims. The compression-to-ventilation ratio of 15:2 is outdated as it was previously used in a two-rescuer adult CPR setting but is not preferred in current guidelines. A ratio of 20:2 also does not align with the updated recommendations and thus can lead to less effective CPR. The 10:1 ratio would not provide sufficient compressions to ensure