What combination of chest compressions and breaths should be provided during CPR?

The recommended combination of chest compressions to breaths during CPR for adults and children who require resuscitation is 30 compressions followed by 2 breaths. This ratio is established by various resuscitation guidelines, including the American Heart Association, which emphasize the importance of uninterrupted high-quality chest compressions to maintain circulation.

The 30:2 ratio is designed to optimize the effectiveness of CPR by ensuring that rescuer attention alternates efficiently between compressions and breaths. Chest compressions help to circulate blood to vital organs, while the breaths provide oxygen to the lungs, enhancing the chances of survival and minimizing potential brain damage due to lack of oxygen.

The other options present different ratios that do not align with current CPR guidelines, which may lead to less effective resuscitation efforts. Thus, the 30 compressions followed by 2 breaths is the correct and established standard to follow during CPR.