Re: post op resection diet
One usually loses weight after surgery, so there is nothing to be alarmed about on that count. Work with what your father can keep down. Is it some particular food or type of food that leads to vomitting? Take it slow! After surgery, I start mostly with vegetable soups working up to cooked vegetables with eggs and ricotta cheese for protein and worked from there.
What was the reason for the resection? And do you know approximately how much colon was removed? Frankly, something does sound funny about the recommendation that he will be on a low residue diet for the rest of his life BUT, BUT, BUT, I am an amateur and do not know his diagnosis and his health particulars. Usually one follows a low fiber diet after surgery but then starts to work in more fiber. (I'm most familiar with diverticulitis.)