â¢ The critical path is defined as the longest path through the CPM network and consists of those activities. that determine the shortest time for project completion. Activities within this or list form a series (or. sequence) of logically connected activities that is called the critical path.
Time is very important when an unconscious person is not breathing. Permanent brain damage begins after only 4 minutes without oxygen, and death can occur as soon as 4 to 6 minutes later. Machines called automated external defibrillators (AEDs) can be found in many public places, and are available for home use.
There is very little research on just how long the body of a brain-dead person can be maintained. The discussion of brain death dates back to the 1950s in France with six patients who were kept alive for between two and 26 days without blood flow to the brain.