How deep should chest compressions be during CPR?

Chest compressions during CPR should be performed at a depth of at least 2 inches for adults, which is why this choice is the correct response. This depth helps to create adequate pressure within the thoracic cavity, facilitating the return of blood to the heart and ensuring effective circulation during cardiac arrest. The American Heart Association (AHA) guidelines emphasize that compressions not only need to be deep enough but also delivered at a rate of 100 to 120 compressions per minute for optimal effectiveness.

While shallower compressions may not provide the necessary circulation, excessively deep compressions can lead to injury, such as fracturing ribs. Therefore, the recommended depth of at least 2 inches strikes a balance between effectiveness and safety, ensuring that compressions can adequately circulate blood throughout the body while minimizing the risk of harm.