Well, I read through the whole thread, hoping there was an update. There WAS and it sounded like he's on the upswing.
Honestly, stints must be in vogue, or something, these days. I must have 15 people I know who've either had them themselves, or have a family member who had gotten them. Out of all of those, everyone seems to be doing great!! He'll probably feel better than ever before, because he now has all five covered. (or open, to be more on point). We'll just hope and pray that he will be just like the others I know about.
Now you stop worrying. Your dad sounds like the ultimate survivor, so he'll probably be doing something daring in no time.