How deep should chest compressions be in adult CPR?

In adult CPR, chest compressions should be administered with a depth of at least 2 inches (5 cm). This depth is critical as it allows for effective movement of blood from the heart to vital organs during cardiac arrest. Compressions that meet this standard help achieve adequate circulation and improve the chances of survival.

The guideline is based on research indicating that compressions must be deep enough to create sufficient pressure in the chest cavity, thus effectively pushing blood to the lungs and other organs. Compressions performed at the optimal depth also maximize the return of blood flow to the heart during the decompression phase, enhancing the overall efficiency of the CPR process.

While deeper compressions might seem beneficial, compressions that exceed 2.5 inches can potentially cause injuries to the ribs or internal organs, making the specified depth a balance between effectiveness and minimizing harm. The focus on 2 inches as the minimum ensures that rescuers apply enough pressure to facilitate blood flow while still adhering to safety guidelines for potential injury risks.