What is the proper compression depth for adult CPR?

The proper compression depth for adult CPR is at least 2 inches (5 cm). This depth is essential to effectively compress the chest and create sufficient pressure to circulate blood to vital organs. Compressions that are too shallow may not be effective in generating the necessary blood flow, which can significantly impact the outcomes of cardiac arrest situations.

In addition, compressions should be performed at a rate of 100 to 120 compressions per minute, and allowing full chest recoil between compressions is crucial to allow the heart to fill with blood before the next compression. Achieving the correct depth not only ensures effective circulation but also aligns with the current guidelines from organizations such as the American Heart Association.

The other options present depths that are either not deep enough or exceed the recommended guidelines, emphasizing the importance of adhering to this specific depth for effective adult CPR.