How deep should compressions be during adult CPR?

During adult CPR, compressions should be at least 2 inches (5 cm) deep. This depth is necessary to ensure that sufficient pressure is applied to the chest to effectively compress the heart and facilitate blood circulation. The depth of compressions plays a critical role in creating the necessary pressure to move blood through the body when the heart is not functioning properly.

When compressions are delivered at the correct depth, it maximizes the chance of maintaining vital blood flow to the brain and other organs during cardiac arrest. The American Heart Association (AHA) guidelines emphasize this specific depth to optimize resuscitation outcomes. Compressions that are too shallow may not provide effective circulation, which can significantly hinder a patient's chances of survival.