I had a colonostomy year's ago. But they said I was not clear enough to see anything. After drinking the entire jug and 3 enemas. Same with just the semsoid colon test. All my ct scans show I have a swollen colon and stool all through. I don't know how to get clean enough for a colonostomy. I am on a feeding tube into my small intestines. Why and how can I get a colonoscomy done? I have been so swollen and in pain. Any ideas? My gastroenterologist doesn't seem to have any. He just said I should not have them done?