I read through too. I wish I had this site when my Father was dieing.
Davy seems to be going thru excatly what my dad did, he even got loose and tried to remove his tube. It is a reflex they told us, because you want to fight the machines.
Stay positive, Davy sounds like a fighter and has a lot to live for.
They will work on him until they know for sure he had no brain function. So that part of your worry can be on the very back burner.
Right now the vent is giving him much need rest, it is amazing how it works the body and gives it time to heal.
We also had my father on life support several time, and he fought his way back.
I believe Davy is going to do the same. Please get some rest, you are going to get sick and you don't want to do that. Davy needs you strong and so do your kids.
Post and vent all you need to, it also helps us knowing what is going on, it does help Davy, because the more people that are thinking of him, the more likely they are praying for him!
Take care,
Brenda