What is the proper depth for chest compressions when providing high-quality CPR to an adult?

The proper depth for chest compressions during high-quality CPR for an adult is at least 2 inches (5 cm). This depth is significant because it ensures that sufficient pressure is applied to the thoracic cavity to create adequate blood flow and increase the chances of restoring a normal heart rhythm during cardiac arrest. Compressing to this depth allows for effective circulation, utilizing the heart’s natural ability to pump blood when sufficient force is applied to the chest.

Chest compressions that are too shallow may not provide adequate perfusion to vital organs, leading to reduced survival chances. A depth of 2 inches strikes a balance between being deep enough to generate necessary blood flow without causing potential injury to the ribcage or internal organs, which can increase with excessive force. This guideline is set to ensure that CPR is both effective and safe for adults experiencing cardiac arrest.