My oldest sister is giving her husband one of her kidneys (the left one, yes - I asked) on March 5th. The surgery is pretty intense, and then he will be on some pretty strong rejection drugs. She will probably be able to go home on Friday or Saturday, but he will most likely be in the hospital in ICU for at least a week, with a possible 3 week total stay. (He is like a brother to me, they got married when I was seven, and I don't ever remember him not being around.)
Please keep them and their family in your prayers. They are grandparents to two darling little ones who need their Nana and Peepaw to make it through OK.