When doing CPR why should you not place hands on the xiphoid process?

You should never perform chest compressions on the xiphoid process because it can damage internal organs and cause serious injury to the patient. The xiphoid process is a small, sword-shaped cartilage at the bottom of the sternum, and it is simply not strong enough to withstand the pressure of chest compressions.

Compression should only be applied to the center of the chest between the nipples, on the sternum. This will maximize blood flow to the heart and brain.