Some interesting information about
Hyperbaric Oxygen Treatments for UC. It looks like it was very successful in treating UC patients.
Even though I'm very claustrophobic, I'd be willing to try this if I could get my insurance company to pay for it.
http://7thspace.com/headlines/408007/hyperbaric_oxygen_treatment_for_inflammatory_bowel_disease_a_systematic_review_and_analysis.html
http://calgaryhyperbariccentre.com/docs/HBOT_for_Severe_Ulcerative_Colitis.pdf