How often should a person administering CPR switch roles to prevent fatigue?

The correct answer is that a person administering CPR should switch roles every 2 minutes to prevent fatigue. This interval allows for a more effective delivery of compressions, as fatigue can greatly reduce the quality and effectiveness of CPR.

When performing CPR, particularly chest compressions, it requires significant physical effort and stamina. After about 2 minutes of continuous compressions, a rescuer may begin to tire, which can lead to decreased force and depth of compressions. This reduction in quality compromises blood flow to vital organs and diminishes the chances of a successful resuscitation.

Switching roles every 2 minutes ensures that each rescuer is fresh and able to maintain high-quality compressions, providing the best possible care for the individual in need. Additionally, it allows for brief recovery periods where rescuers can check for signs of responsiveness, pulse, and prepare for the next steps in resuscitation if needed.

In contrast, intervals such as those suggested in other options—every 5 minutes, after every 30 compressions, or only when the emergency team arrives—do not sufficiently address the issue of fatigue and may negatively impact the efficacy of the CPR being given. Therefore, the 2-minute guideline is a critical component of effective CPR practice.