Basic Life Support (BLS) Practice Exam

When switching roles during CPR with a second provider, how long should interruptions in chest compressions be minimized to?

1. 10 seconds

2. 5 seconds

3. 15 seconds

4. Any amount of time is acceptable as long as compressions are resumed.

The correct answer is: 10 seconds

Minimizing interruptions in chest compressions during CPR is crucial for maintaining blood circulation to vital organs. When switching roles with a second provider, it is recommended that interruptions in chest compressions be kept to no more than 10 seconds. This timeframe is essential because prolonged interruptions can lead to a decrease in blood flow and the effectiveness of CPR. The focus on a 10-second limit stems from evidence that shows that after 10 seconds without compressions, the likelihood of a successful return of spontaneous circulation decreases significantly. By adhering to this guideline, rescuers can ensure that they are providing continuous and effective support to a person in cardiac arrest, thereby improving the chances of survival and recovery. While shorter interruptions are always preferred, the standard suggests that limiting breaks to 10 seconds is a practical expectation in the high-stress environment of a resuscitation effort.