I haven't encountered anyone who was successfully able to keep their rectum. Usually more surgery is required. I would suggest you post this question at www.jpouch.org You will probably encounter folks who had similar surgery but eventually had to have the rectum removed. I am curious though, your signature line says you are having a jpouch in July yet you desire to keep the rectum? This is confusing to me as the jpouch replaces the rectum.
dx proctitis in 1987
dx UC in 1991, was stable until 1998
1998 started prednisone, asacol, pentasa, nortriptylene, ativan, 6MP, rowasa enemas and suppositories, hydrocortisone enemas, tried the SCD diet, being a vegetarian, omega 3s, flax, pranic healing, yoga, acupuncture, probiotics
2000 lost all my B-12 stores and became anemic
2001 opted for j-pouch surgery- now living life med-free