During CPR for an adult, how many rescue breaths should be given after every 30 chest compressions?

In the context of performing CPR on an adult, the recommended ratio of chest compressions to rescue breaths is 30 compressions followed by 2 rescue breaths. This approach is designed to ensure adequate ventilation and circulation during the time when the heart and lungs are not functioning effectively.

The two rescue breaths following the 30 compressions serve to inflate the lungs and provide oxygen to the body, which is vital for survival during a cardiac arrest situation. It's crucial to deliver these breaths effectively; they should be given slowly enough to allow the chest to rise visibly, ensuring adequate air is delivered without causing a rush that could lead to complications such as gastric inflation.

This specific sequence of 30:2 is established by current CPR guidelines to optimize the chances of survival until advanced medical help arrives.