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Oxygen therapy may help hospitalized colitis patients avoid surgery

NCT ID NCT05987852

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests whether breathing pure oxygen in a pressurized chamber (hyperbaric oxygen therapy) can help people hospitalized with moderate to severe ulcerative colitis flares. The goal is to see if this treatment can stop symptoms like rectal bleeding and frequent stools, and reduce the need for stronger medications or surgery. About 126 adults aged 18 to 85 will take part, receiving either real or sham oxygen sessions. The approach aims to improve oxygen levels in the gut to reduce inflammation.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 126 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jan 2024

Expected to finish

Sep 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 85 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Participants with known or newly diagnosed UC who require hospitalization for an acute moderate to severe flare * Age 18-85 * Able to fully participate in all aspects of the trial * Consented and able to receive first HBOT session within first 48 hours of initiation of intravenous steroids * Agreement to not participate in another trial for the duration of the active intervention period Exclusion Criteria: * Received hyperbaric oxygen therapy either as part of standard of care or through a clinical trial prior to enrollment * Complication requiring urgent surgical intervention * Requirement for new start of a biologic or small molecule during the hospitalization prior to randomization and/or anticipated requirement for rescue medical or surgical therapy within 48 hours of randomization * Toxic megacolon * Inability to receive intravenous steroids * Historically failed or been exposed to 4 or more classes of advanced therapeutic options * Known or suspected diagnosis of Crohn's colitis, indeterminate colitis, ischemic colitis, radiation colitis, diverticular disease associated with colitis, microscopic colitis or infectious colitis * Received any investigational drug within 30 days * Clinically significant cardiac, renal, neurological, endocrine, respiratory or hepatic impairment that increases the risk for HBOT toxicity * Women who are pregnant or nursing * Unwillingness to complete course of HBOT

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    12 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Allegheny Health

    RECRUITING

    Pittsburgh, Pennsylvania, 15090, United States

  • Cornell University Medical Center

    ACTIVE_NOT_RECRUITING

    New York, New York, 10065, United States

  • Dartmouth Hitchcock Medical Center

    RECRUITING

    Lebanon, New Hampshire, 03756, United States

  • Massachusetts General Hospital

    RECRUITING

    Boston, Massachusetts, 02114, United States

  • Mayo Clinic

    RECRUITING

    Rochester, Minnesota, 55905, United States

  • Northwestern Medicine Lake Forest Hospital

    RECRUITING

    Lake Forest, Illinois, 60045, United States

  • Orlando Health

    RECRUITING

    Orlando, Florida, 32806, United States

  • State University of New York Upstate Medical University

    RECRUITING

    Syracuse, New York, 13210, United States

  • University of Alabama Medicine

    RECRUITING

    Birmingham, Alabama, 35233, United States

  • University of Los Angeles Health

    RECRUITING

    Los Angeles, California, 90024, United States

  • University of Louisville

    RECRUITING

    Louisville, Kentucky, 40202, United States

  • University of Miami Health

    RECRUITING

    Miami, Florida, 33136, United States

  • University of Pittsburgh Medical Center

    RECRUITING

    Pittsburgh, Pennsylvania, 15213, United States

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