What is the optimal depth of chest compressions for adults during CPR?

The optimal depth of chest compressions for adults during CPR is between 2 to 2.4 inches (5 to 6 cm). This depth is critical as it allows for adequate blood flow during the compressions while minimizing the risk of injury. Compressions that are too shallow may not effectively circulate blood, which can lead to a higher chance of negative outcomes for the patient.

By compressing to a depth in the range of 2 to 2.4 inches, resuscitators create enough pressure in the chest cavity to facilitate blood flow to vital organs while adhering to guidelines established by organizations such as the American Heart Association. This depth strikes a balance between being sufficiently deep to ensure effectiveness and avoiding excessive force that could cause injury.

A depth of 1-2 inches is insufficient to generate adequate blood flow, while depths exceeding 2.4 inches may increase the risk of injury to the thoracic organs and the ribcage.