How Long Long Can A Person Be Unresponsive Tue Ct

How long long can a person be unresponsive tue ct scan showed no signs of stroke, no blood clots, no bleeding to the brain but is breathing 60% by hisself and 30% on a ventiliator. He is moving his legs, feets, arms, raising his self up, eyes opening. And closing, pupils just starting dilating but no commands demanding do you think he probably had a bad seizure