In a two-rescuer scenario for adult CPR, how many hands should be used during compressions?

In a two-rescuer scenario for adult CPR, using two hands during compressions is essential for several reasons. First, two hands provide greater strength and stability, which is critical for delivering effective chest compressions. This method allows the rescuers to apply sufficient force to compress the chest to the recommended depth of at least 2 inches while also ensuring that the compressions are both effective and efficient.

Moreover, in this scenario, one rescuer is typically in charge of providing breaths, while the other focuses on compressions. Two hands allow for a steady rhythm and consistent depth, which is vital for maintaining blood circulation until emergency medical services arrive. The use of both hands also reduces the risk of tiring quickly, thus enabling the rescuer to maintain a high quality of chest compressions throughout the entire process.

Using one hand or an insufficient number of hands would not provide the necessary force and could lead to ineffective compressions, which can drastically reduce the chances of survival in a cardiac arrest situation.