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

The appropriate depth for chest compressions on an adult is at least 2 inches (5 cm) deep. This depth is critical to ensure effective blood circulation during cardiopulmonary resuscitation (CPR). The goal of chest compressions is to create adequate pressure in the chest cavity to propel blood through the heart and into vital organs, which is crucial during cardiac arrest.

Research and guidelines from organizations like the American Heart Association have established that compressing to a depth of at least 2 inches not only provides sufficient volume of blood flow, but it also minimizes the risk of causing injury by over-compressing. This depth allows the heart to refill adequately between compressions, thus optimizing the chances of restoring normal heart rhythm and increasing survival rates.

In performing CPR, it is also important to allow full recoil of the chest between compressions, as this helps maintain blood flow and reduces the risk of complications.