How often should rescuer change positions during CPR?

During CPR, it is crucial for rescuers to change positions every 2 minutes. This recommendation is based on the need to maintain high-quality chest compressions, which can become less effective due to fatigue. After about 2 minutes of continuous compressions, rescuers may experience decreased force and technique due to the physical exertion required for effective compressions.

Switching rescuers at the 2-minute mark allows for fresh personnel to take over, ensuring that compressions remain as strong and effective as possible. This practice also helps in maintaining the rhythm and consistency of compressions, which is essential for optimizing blood circulation during cardiac arrest.

If rescuer changes are too infrequent, such as every 5 minutes or longer, the quality of compressions can deteriorate significantly, increasing the risk of poor outcomes for the patient. The 2-minute interval strikes a balance between maintaining effectiveness and allowing rescuers to avoid exhaustion.