Final answer:
When switching roles during two-person CPR, the interruption in chest compressions should be less than 10 seconds to maintain a rate of at least 100 compressions per minute and ensure continuous blood flow to the brain.
Step-by-step explanation:
In two-person CPR, it is crucial to minimize interruptions in chest compressions to provide the best possible chance for recovery. When switching roles, chest compressions should be stopped for as brief a period as possible. The current guidelines recommend that the switch should take less than 10 seconds.
Maintaining a rhythm of at least 100 compressions per minute is essential, and the switch must be executed quickly and efficiently to not compromise the flow of blood to the brain, which is especially susceptible to damage due to lack of oxygen. Quick transition between compressors in CPR is essential because brain cells begin to die in as little as 4-6 minutes without oxygen.