What is the correct hand placement for chest compressions on an adult?

The correct hand placement for chest compressions on an adult is at the lower half of the sternum. This positioning ensures that the force of each compression is effectively transmitted to the heart, which is located just behind the sternum. Compressions performed here allow for optimal chest recoil and blood flow during cardiopulmonary resuscitation (CPR).

Placing the hands at the center of the abdomen, the upper chest area, or on the ribcage just below the collarbone would not provide the requisite force or direct pressure on the heart. Compressing the abdomen would not assist in circulating blood, while compressing the upper chest or ribcage might lead to ineffective compressions and could potentially cause injury. Therefore, correct placement at the lower half of the sternum is essential for maximizing the chances of restoring circulation in a cardiac emergency.