What is the appropriate compression depth for adult CPR?

The appropriate compression depth for adult CPR is 2 inches. In adult patients, the goal of chest compressions is to create sufficient pressure to circulate blood effectively. Studies and guidelines from organizations such as the American Heart Association emphasize that a compression depth of at least 2 inches (about 5 cm) but not more than 2.4 inches (about 6 cm) is ideal to ensure that the heart is adequately compressed to promote optimal blood flow.

Compressions that are too shallow, such as only 1 inch, will not provide the necessary force needed to circulate blood effectively, significantly reducing the chances of survival. Likewise, compressions deeper than 2.4 inches can increase the risk of injury to the ribs or internal organs, which can complicate the situation further. Thus, the 2-inch depth strikes the right balance between effective circulation and minimizing the risk of injury during CPR.