Answer :
Final answer:
In one man adult CPR, breathing of the victim should be checked for approximately 10 seconds. Immediate chest compressions should be performed, since brain cells can die after six minutes without oxygen.
Explanation:
When performing one man adult CPR, the rescuer should spend approximately no more than 10 seconds to check the breathing of the victim. This short duration time is crucial because any delay can make the situation worse, considering the fact that brain cells start to die after about six minutes without oxygen. It's important to perform high-quality chest compressions first and foremost, and check the victim's breathing periodically while waiting for professional medical help.
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