What is the typical compression-to-ventilation ratio in adult CPR?

In adult CPR, the typical compression-to-ventilation ratio is 30:2. This means that for every 30 chest compressions performed, the rescuer should provide 2 rescue breaths. This ratio is designed to maximize the effectiveness of the chest compressions while ensuring that the victim receives adequate ventilation.

The rationale behind this ratio lies in the need to maintain blood circulation while also addressing the need for oxygenation. Chest compressions are the most critical component of CPR, as they help to pump blood to vital organs. The inclusion of ventilation, while important, is secondary in this context, which is reflected in the higher number of compressions relative to breaths.

In scenarios where there are more rescuers present, the chest compression to breath ratio can differ, especially in child and infant CPR or when using advanced airway techniques. However, for a single rescuer performing CPR on an adult, the 30:2 ratio is the standard guideline taught during CPR training. This protocol is consistent with American Heart Association guidelines and reflects training standards for emergency response situations.