The Efficacy of Hyperbaric Oxygen-assisted Treatment for ASUC and Refractory IBD

November 20, 2025 updated by: Jie Liang, Xijing Hospital of Digestive Diseases

Analysis of the Efficacy of Hyperbaric Oxygen-assisted Treatment for Acute Severe Ulcerative Colitis and Refractory Inflammatory Bowel Disease: A Randomized Controlled Study

The Department of Gastroenterology plans to conduct a randomized controlled study on the efficacy analysis of hyperbaric oxygen-assisted treatment for acute severe ulcerative colitis and refractory inflammatory bowel disease. The research design is a randomized, controlled study. The objective is to compare the clinical remission rate, clinical response rate, endoscopic remission rate, and endoscopic response rate between patients with acute severe ulcerative colitis (ASUC) and refractory inflammatory bowel disease (IBD) treated with hyperbaric oxygen therapy (HBOT) as an adjuvant and those treated with standard treatment regimens. This study aims to provide clear evidence for the use of HBOT as an adjuvant treatment for ASUC and refractory IBD.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Enrolling by invitation

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
44

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • China
    • Shaanxi
      • Xi'an, Shaanxi, China, 710032
        • Xijing Hospital of Digestive Diseases

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • According to the diagnostic criteria for ulcerative colitis in the 2018 national consensus opinion on the diagnosis and treatment of inflammatory bowel disease, it was confirmed as ulcerative colitis;
  • According to the Truelove-witts standard, it was diagnosed as acute severe ulcerative colitis: the frequency of bloody stools per day is 6 times or more, and at the same time, one of the following systemic toxic manifestations is present: heart rate of 90 bpm, body temperature greater than 37.8℃, hemoglobin less than 105g/L, and erythrocyte sedimentation rate greater than 30mm/h;
  • Age ≥ 18 years old;
  • Patients who can and are willing to comply with the research protocol can provide a signed and dated written informed consent form.

Exclusion Criteria:

  • Patients who may require immediate surgical treatment;
  • Pregnant or lactating mothers;
  • Patients with a score of ≥6 years old (TMM30/40/50) and <6 points in the measurement of the Eustachian tube;
  • Patients with a lung bulla larger than 2 cm at the lung apex or near the pleura in the chest plain scan;
  • Patients with severe liver or kidney dysfunction, heart failure or other serious systemic diseases;
  • Any situation that hinders the completion of the study or interferes with the analysis of the research results, including a history of drug or alcohol abuse, a smoker who has not quit, patients with mental illness or poor compliance, those with clear immune system (including HIV infection), blood system or tumor-related diseases;
  • Patients who have withdrawn their informed consent;
  • Patients who have participated in other clinical trials within 3 months before screening.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: Heperbaric oxygen-assisted Treatment

During the 7-day continuous intravenous administration of methylprednisolone sodium succinate at a dose of 40mg per day, hyperbaric oxygen therapy was also provided. The procedure was as follows:

  1. Pressurization: It took 25 minutes to increase the pressure from 1ATA to 2.5ATA (without oxygen inhalation)
  2. Stabilization: A total of 80 minutes (30 minutes of oxygen inhalation, 5 minutes of rest, 30 minutes of oxygen inhalation, 5 minutes of rest, 10 minutes of oxygen inhalation)
  3. Decompression: 25 minutes (the first 18 minutes continued oxygen inhalation, and then 7 minutes of oxygen inhalation was stopped)
Drug: Administration of methylprednisolone sodium succinate
7-day continuous intravenous administration of methylprednisolone sodium succinate at a dose of 40mg per day
Procedure: Hyperbaric Oxygen Therapy
  1. Pressurization: It took 25 minutes to increase the pressure from 1ATA to 2.5ATA (without oxygen inhalation)
  2. Stabilization: A total of 80 minutes (30 minutes of oxygen inhalation, 5 minutes of rest, 30 minutes of oxygen inhalation, 5 minutes of rest, 10 minutes of oxygen inhalation)
  3. Decompression: 25 minutes (the first 18 minutes continued oxygen inhalation, and then 7 minutes of oxygen inhalation was stopped)
Other: Control Treatment
the 7-day continuous intravenous administration of methylprednisolone sodium succinate at a dose of 40mg per day
Drug: Administration of methylprednisolone sodium succinate
7-day continuous intravenous administration of methylprednisolone sodium succinate at a dose of 40mg per day

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Clinical response
Time Frame: 7 days after treatment starts
The Mayo score (or partial Mayo score) decreased by at least 3 points or more compared to the baseline (before treatment), or decreased by at least 30% from the baseline level. The single-item bleeding score decreased by at least 1 point and the absolute score was ≤ 1.
7 days after treatment starts

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Clinical remission
Time Frame: 7 days after treatment starts
Mayo score total score ≤ 2 and individual score ≤ 1
7 days after treatment starts
Endoscopic response
Time Frame: 7 days after treatment starts
The UCEIS score decreased by ≥ 2
7 days after treatment starts
Endoscopic remission
Time Frame: 7 days after treatment starts
The UCEIS score was 0
7 days after treatment starts

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Xijing Hospital of Digestive Diseases

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
September 30, 2024

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 31, 2025

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 31, 2025

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
November 20, 2025

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 20, 2025

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 2, 2025

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
December 2, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 20, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
November 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • XJS20242001-C-1

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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