Fun update!
Daddy's been under sedation since this saga began; they were worried about bringing him out (they had to restrain him previously) and getting the ventilator tube out. Well, no more worries...
They brought him out gradually while still ventilated; in the process, he quickly reached up and ripped out the ventilator tube. He's baaack! My sister actually had a conversation with him for the first time this afternoon, but the hospital has him restrained. She had to make him promise he wouldn't rip anything else out so she could have them release his arm to hold his hand. The oxygen is the next potential victim.