What is the correct depth for chest compressions on an adult?

The recommended depth for chest compressions on an adult is at least 2 inches. This depth is crucial because effective chest compressions help create sufficient blood flow during cardiopulmonary resuscitation (CPR). The goal is to compress the chest deeply enough to allow the heart to pump blood during the compression phase while ensuring that blood can refill the heart during the relaxation phase.

Research and guidelines from the American Heart Association emphasize that compressions should be performed at a depth of 2 to 2.4 inches, which strikes a balance between adequate mechanical function of the heart and safety, minimizing the risk of injuring the ribs or sternum while still being effective in resuscitation efforts. Compressions that are less than 2 inches may not generate enough pressure to adequately circulate blood, significantly reducing the chances of survival for someone experiencing cardiac arrest.