How long should you continue CPR before reassessing with the AED in a two-rescuer scenario?

How long should you continue CPR before reassessing with the AED in a two-rescuer scenario?

• A. 30 seconds
• B. About 2 minutes (5 cycles)
• C. 4 minutes
• D. 10 minutes

Answer: (B)

In two-rescuer CPR, the priority is maintaining high-quality chest compressions to maximize blood flow, while still checking the rhythm with the AED at appropriate intervals. Reassessing with the AED about every two minutes allows you to determine if a shock is needed without unduly interrupting chest compressions. This 2-minute window roughly equals five cycles of CPR (about five rounds of compressions with ventilations at the typical 30:2 ratio). After each two-minute period, you pause briefly for the AED to analyze and, if indicated, deliver a shock, then immediately resume CPR. Shorter intervals like 30 seconds would cause excessive interruptions, while much longer intervals delay potential shocks and reduce perfusion.

In two-rescuer CPR, the priority is maintaining high-quality chest compressions to maximize blood flow, while still checking the rhythm with the AED at appropriate intervals. Reassessing with the AED about every two minutes allows you to determine if a shock is needed without unduly interrupting chest compressions. This 2-minute window roughly equals five cycles of CPR (about five rounds of compressions with ventilations at the typical 30:2 ratio). After each two-minute period, you pause briefly for the AED to analyze and, if indicated, deliver a shock, then immediately resume CPR. Shorter intervals like 30 seconds would cause excessive interruptions, while much longer intervals delay potential shocks and reduce perfusion.