My thoughts and prayers to Charlie and his family. My dad was in an induced coma for 8 weeks for the same thing. He waited too long and the small intestine ruptured. They had to cut him open, take everything out, wash it and put everything back, after removing a 10" section.
He was in the induced coma so that the Mesentery would regenerate.
That was in the mid 1980's and he is completely recovered - just has to watch what he eats.