My father's first week of hemodialysis, got hypertension attack after 3rd session resulting to hemorrhagic stroke, Doctor said he's hopeless

Please, my father is still in the hospital but we're now only waiting for his heart to stop and I just can't stop questioning.

After he finished his 3rd and last session for his 1st week of hemodialysis (April 3, 11PM-2AM), he experienced hypertension spike right after he was brought up to his room to rest. It resulted to his nerve popping and brain bleeding (ruptured brain aneurysm) vomited acid repeatedly, can't speak and had difficulty moving his body immediately. Didn't respond for the following hours, and his heart stopped at 11AM that day, he's been incubated ever since and hasn't woken til now (April 6)

Is he really gone?