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People in the experiment were deemed unconcious from 1.6 seconds to almost 10 seconds after the choke began. Others were not choked out after 20 seconds. If you held the person who was unconcious after 1.6 seconds for another 8 or 9 seconds, you could cause permanent brain damage or death.
A American Red Cross answered. 1  If a conscious choking adult becomes unconscious, carefully lower the person to the ground, open the mouth and look for an object. 2  If an object is seen, remove it with your finger.  Open the personâs airway by tilting the head and try to give 2 rescue breaths.