During CPR, how many cycles of chest compressions and rescue breaths should be administered?

The correct answer is based on established guidelines for performing cardiopulmonary resuscitation (CPR). During adult CPR, the standard sequence involves delivering thirty chest compressions followed by two rescue breaths. This 30:2 ratio is designed to ensure that adequate blood circulation is maintained through chest compressions while also providing oxygenation to the victim through rescue breaths.

This method maximizes the chances of restoring circulation and breathing in an unconscious patient who is not breathing or is not breathing normally. The cycle of thirty compressions followed by two breaths should be repeated until emergency medical services arrive or an automated external defibrillator (AED) becomes available.

Other options do not align with current CPR guidelines. For example, five cycles or ten cycles are not recommended because they do not specify the correct ratio of compressions to breaths. Additionally, the option with two compressions followed by thirty breaths is incorrect, as it significantly deviates from the established protocol of stabilization through compressions before providing oxygen. Thus, understanding this proper sequence is crucial for effective CPR administration.