What is the correct depth for chest compressions in adults during CPR?

The depth for chest compressions in adults during CPR is set at at least 2 inches (5 cm). This depth is recommended because it ensures that compressions are effective in creating sufficient blood flow during cardiac arrest. Compressions that are too shallow may not generate enough pressure to circulate blood to vital organs, especially the heart and brain, which require adequate oxygenation to sustain life.

Research and guidelines from organizations such as the American Heart Association emphasize the importance of achieving this depth to maximize the chances of survival and recovery. Depths less than 2 inches do not provide the necessary pressure, while excessively deep compressions (such as those at 3 inches or more) can potentially lead to injuries, including rib fractures or damage to internal organs. Thus, the standard of at least 2 inches effectively balances the need for adequate compressions with a reduced risk of harm to the patient.