When should you switch rescuers during CPR?

Switching rescuers during CPR is important to maintain effective chest compressions and avoid fatigue. The correct answer is to switch every 2 minutes or if the current rescuer feels fatigued. This guideline is based on the recognition that high-quality chest compressions are critical for maintaining blood flow during cardiac arrest.

After approximately 2 minutes of continuous CPR, a rescuer may begin to tire, which can impact the depth and rate of compressions. Fatigue can lead to a decrease in compression quality, thereby reducing the chances of successfully sustaining circulation and perfusion until advanced medical help arrives.

Furthermore, changing rescuers every 2 minutes helps ensure that each person can maintain focus and physical performance, ultimately contributing to the overall effectiveness of the resuscitation effort. Regularly scheduled exchanges also allow for brief checks on the victim's condition and for bending down to check other important aspects, like ventilation if applicable.

Switching rescuers as soon as the heart starts beating or waiting for longer durations, such as 3 or 5 minutes, may lead to gaps in chest compressions, which is detrimental in a cardiac arrest situation. Consistency in the quality and timing of compressions is key to successful resuscitation efforts.