Hyperbaric Oxygen Enabled a Transition to Oral Steroids in an Acute Severe Ulcerative Colitis Flare

Ulcerative colitis (UC) is characterized in part by a dysregulated response to tissue hypoxia. While intravenous (IV) steroids are the mainstay of treatment for acute severe UC (ASUC), up to one-third of patients are refractory to steroids alone and require rescue therapy.

A 71-year-old female with extensive UC on infliximab presented with abdominal pain and more than 10 bloody bowel movements per day. Her infliximab concentration was undetectable with a positive antibody level. Flexible sigmoidoscopy on hospital day (HD)1 showed Mayo 3 colitis; biopsies for CMV were negative. She was started on hydrocortisone IV with improvement in her CRP from 56 to 40 mg/L. She also received 1 dose of vedolizumab. Hyperbaric treatments were offered but declined. By HD5, she was clinically improved, with a CRP of 9 mg/L. She was transitioned from IV to oral steroids. After starting oral steroids her symptoms relapsed, her CRP increased from 9 to 48 mg/L, and IV steroids were reinitiated on HD6. Hyperbaric medicine was reconsulted and she completed 5 hyperbaric oxygen (HBO2) treatments (HD 7-11) with prompt reduction in CRP, stool frequency, and bleeding. After 3 HBO2 treatments, she transitioned successfully from IV to oral steroids on HD9.

This case demonstrates the potential of HBO2 therapy to help UC patients transition successfully from IV to oral steroids who were previously refractory to de-escalation. HBO2 therapy may be considered as an adjunctive treatment for patients with ASUC to potentiate the effects of standard therapies and avoid progression to colectomy.