Which position is commonly used to administer CPR?

The supine position is the most commonly used position for administering CPR. In this position, the patient lies flat on their back, allowing the rescuer to perform chest compressions effectively. This alignment ensures that the chest can fully recoil after compressions, enabling optimal blood flow and oxygen delivery during the lifesaving procedure. Additionally, the rescuer can easily access the center of the chest without obstruction, which is crucial for maintaining the correct hand placement and depth of compressions.

When considering the other positions: the prone position, where the patient lies on their stomach, is not appropriate for CPR because it obstructs access to the chest for compressions and airway management. The sitting position would not allow for effective compressions, as the chest would not be exposed adequately to apply the necessary force. Similarly, the left lateral position is typically used for patients who are recovering or in a stable condition to maintain an open airway but does not support the mechanics required for CPR, which relies on direct access to the chest for effective compressions.