In each cycle of CPR, how many chest compressions should be performed?

In each cycle of CPR, performing 30 chest compressions is the standard protocol recommended by guidelines. This number is based on evidence suggesting that delivering compressions at this ratio allows for optimal blood circulation to vital organs during cardiac arrest. Chest compressions are crucial for maintaining blood flow to the brain and heart, and the 30 compressions are typically followed by 2 rescue breaths in a complete cycle.

This 30:2 compression-to-breath ratio has been determined to provide an effective rhythm and depth for compressions, maximizing the benefits during resuscitation efforts. It's important for responders to follow these guidelines to enhance the chances of survival and minimize potential brain damage due to prolonged lack of oxygen.

Other choices reflect incorrect ratios that do not align with current resuscitation practices, which aim to standardize CPR techniques for consistency and effectiveness across different responders and situations.