When should you switch roles with another rescuer during CPR?

Switching roles with another rescuer during CPR is crucial to maintaining effective compressions and minimizing fatigue. The recommended practice is to change roles every 5 cycles of CPR, which corresponds to about 2 minutes of continuous effort. This timeframe helps prevent exhaustion in the rescuer, ensuring that high-quality chest compressions are consistently delivered, which is vital for maintaining blood flow and improving the chances of a successful outcome.

If a rescuer becomes fatigued before the 5 cycles are completed, it is important to switch roles immediately. Fatigue can lead to decreased compression rate and depth, compromising the effectiveness of CPR. Therefore, rigorously adhering to this guideline enhances the quality of care provided to the patient.

While the other options suggest intervals or conditions for switching that are not aligned with best practices, they don't provide the optimal balance between effective CPR and the sustainability of rescuers’ efforts.