What physiological benefit is created by performing chest compressions at the appropriate depth?

Performing chest compressions at the appropriate depth significantly enhances blood flow to the body, which is critical during cardiac arrest situations. The primary purpose of chest compressions is to create artificial circulation, which helps maintain vital organ perfusion when the heart is not pumping effectively. By compressing the chest to the recommended depth—approximately 2 to 2.4 inches in adults—compressions effectively increase intrathoracic pressure, which aids in pushing blood from the heart to vital organs and tissues.

This blood flow is essential for delivering oxygen and nutrients to the brain and other critical areas, thus increasing the chances of survival and reducing the risk of permanent damage from lack of perfusion. While improved oxygen delivery is a consequence of effective compressions and blood flow, the direct physiological benefit associated with the correct compression depth fundamentally supports the circulation of blood throughout the body.