How deep should compressions be when performing CPR on an adult?

When performing CPR on an adult, the depth of chest compressions is critical to ensuring effective circulation during cardiac arrest. The recommendation is to compress the chest to a depth of 2 inches (5 cm). This depth is sufficient to create positive pressure within the thoracic cavity, which helps to prop up blood flow to vital organs, particularly the heart and brain, during a cardiac emergency.

Compressions that are too shallow may not generate adequate pressure to circulate blood effectively, thereby diminishing the chances of survival and recovery. Conversely, compressions that are too deep can potentially cause trauma to the chest wall, ribs, or internal organs, which is why adhering to the recommended depth is essential for both efficacy and safety. The 2-inch depth strikes a balance between achieving adequate cardiac output and minimizing the risk of injury.

This standard of depth has been established through research and practical studies to provide the best possible outcomes in resuscitation efforts for adults.