How often should you switch rescuers during CPR?

The correct answer is that rescuers should switch during CPR every two minutes. This guideline is based on the understanding that high-quality CPR requires sustained effort and physical endurance. After typically about two minutes of continuous compressions, rescuers may begin to experience fatigue, which can lead to a decrease in the effectiveness of the compressions. By switching every two minutes, rescuers can maintain the quality of CPR, ensuring that compressions are delivered at the proper rate and depth.

Additionally, this interval allows for a brief moment for the rescuer to take a quick breath and reset without significantly interrupting the flow of CPR. This practice maximizes the chance of survival for the cardiac arrest victim, as effective and consistent compressions are crucial in maintaining blood circulation during the critical moments until advanced medical help arrives.