Patient is a 35-year old healthy male who went into sudden cardiac arrest during an operation on his lungs. He has been in a medically-induced coma for three weeks. He was weaned off the medications causing his unconsciousness and taken off his ventilator today. If the scans look good and the brain surgeon seems positive about his recovery, how long do you estimate until he is fully awake?
Its it is good to know that he is recovering, and the progress you have mentioned surely indicate s that the chances of him coming back to normal like is fair to good.  Now we can never say by what time he would come to normal, however if post cardiac arrest the pt was removed in a short time and the doctors are sure that no hypoxic damage to the bank has occurred, he should be back soon.  Electroencephalogram is the test to check the brain activity which can be done to assess how active is the brain. Hoping I could help, any further ref I am available Http