Final answer:
Compressors in 2-rescuer adult BLS should switch every 2 minutes to maintain high-quality chest compressions and minimize responder fatigue, ensuring effective CPR.
Step-by-step explanation:
The question relates to two-rescuer adult Basic Life Support (BLS), specifically to the frequency and reasoning behind switching compressors during CPR. In two-rescuer CPR, it is recommended to switch compressors every 2 minutes or after about 5 cycles of 30 compressions and 2 breaths. This is due to the physical demands of providing high-quality chest compressions, which can be very tiring and may lead to a decrease in the effectiveness of the compressions over time. The switch aims to maintain the recommended depth of at least 5 cm and rate of 100 compressions per minute, crucial to ensure adequate circulation and to minimize the risk of irreversible brain damage due to a lack of blood flow.