What is the primary anatomical landmark for CPR in adults?

The primary anatomical landmark for performing CPR in adults is the sternum. This location is critical since the sternum serves as a reliable and standardized point for proper hand placement during chest compressions. When administering CPR, rescuers aim to compress the chest at the lower half of the sternum, ensuring effective blood circulation through the heart and vital organs. Proper positioning over the sternum also helps achieve the necessary depth and force required for compressions to be effective.

Using the sternum as the landmark helps maintain a consistent technique across different individuals, which can greatly improve the chances of successful resuscitation. Other anatomical landmarks, such as the lower abdomen, above the navel, or the clavicle, do not provide the stability and efficiency needed for effective chest compressions, which is essential for maintaining blood flow during cardiac arrest scenarios.