For an adult, how deep should chest compressions be during CPR?

Chest compressions during CPR for adults should be performed at a depth of at least 2 inches (5 cm) deep. This depth is recommended based on research that shows effective circulation and blood flow during cardiac arrest is achieved with compressions at this depth. When compressions are too shallow, there is a risk that adequate blood flow to the heart and brain will not be maintained, which is critical for survival and recovery.

The emphasis on a depth of at least 2 inches ensures that enough pressure is applied to the chest to facilitate the appropriate compression of the heart, allowing it to pump blood effectively during the emergency situation. The American Heart Association's guidelines reflect this understanding, reinforcing the importance of the correct depth to enhance the outcomes of resuscitation efforts.

Chest compressions should also be performed at a rate of 100 to 120 compressions per minute, and it's essential to allow full chest recoil between compressions to optimize blood return to the heart.