What is the primary reason for allowing full sternum recoil during CPR?

The primary reason for allowing full sternum recoil during CPR is to create negative pressure for venous return. When chest compressions are performed, the sternum is compressed, which helps pump the heart and circulate blood. However, it is just as important to allow the chest to fully recoil after each compression. This recoil creates a negative pressure inside the thoracic cavity, which enhances venous return to the heart. When the chest fully rebounds, it facilitates blood flow back to the heart, thereby improving the effectiveness of CPR.

Maintaining proper hand position, while important for effective compressions, is not the primary concern related to sternum recoil. Preventing chest injuries is certainly a consideration during CPR, particularly for minimizing trauma; however, it does not directly address the physiological impact of full chest recoil on venous return. Body temperature maintenance is an important aspect of patient care overall, but it is not relevant to the mechanics of CPR and the significance of sternum recoil during the procedure.