Have the doctors checked his serum ammonia level?
That is not routinely checked with the other kidney blood panels.
My husband developed a lot of confusion until we discovered that the problem was his elevated serum ammonia. There is medication to help. The best oral med is Rifaximin (generic for Xifaxin).
We order it from Mapleleaf meds for $1.00 a pill rather than $10 a pill for Xifaxin.
You do have a tall order to physically handle all of this. I hope you also have some help.