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A Eickhoff, R Jakobs, D Schilling...
https://pubmed.ncbi.nlm.nih.gov/17611919/Actively Recruiting
Led by Christopher C. Thompson, MD, MSc · Updated on 2026-06-25
100
Participants Needed
1
Research Sites
26 weeks
Total Duration
Researchers are investigating the use of Low Thermal Plasma LTP treatment for marginal ulcers that develop at the site of Roux-en-Y gastric bypass surgery. These ulcers are internal wounds that can be slow to heal and cause complications like pain, bleeding, and the need for surgery. The study aims to compare this new minimally invasive plasma treatment with the current standard care using proton pump inhibitors PPIs, hoping to improve healing and reduce the risks associated with more invasive surgical options. Participants will be randomly assigned to receive either the LTP treatment plus standard PPI therapy or standard PPI therapy alone. The LTP treatment involves applying low power argon plasma during an endoscopic procedure to the ulcerated areas to promote healing. If ulcers in the standard care group do not heal after 8 weeks, patients may crossover to receive the LTP treatment. Treatments and evaluations will occur at baseline, 4 weeks, and 8 weeks. Throughout the study, participants will undergo endoscopic examinations to measure ulcer healing, tissue oxygenation, gastrointestinal symptoms, and quality of life. Researchers will monitor for any procedure-related adverse events up to 8 weeks. The main outcome is the ulcer healing success rate measured by endoscopy. Participants will attend follow-up visits to assess healing progress and other clinical improvements during the approximately 8-week study period.
CONDITIONS
Marginal Ulcer Healing With Low-Thermal Argon Plasma Endoscopic Treatment
M
Michele B Ryan, MS
S
Samantha Geltz
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Christopher C. Thompson, MD, MSc
Lead Sponsor
Erbe USA Incorporated
Collaborating Sponsor
This table compares participation in this trial with other options available for this condition. The information is drawn from published research and the trial’s study details and is provided for educational purposes only.
| Factors | Low Thermal Plasma (LTP) Endoscopic Treatment | Standard of Care (PPI) Ulcer Treatment |
|---|---|---|
| What it is | A minimally invasive endoscopic treatment using low thermal (low-power) filtered argon plasma to coagulate and promote healing of marginal ulcers at the anastomosis site after Roux-en-Y gastric bypass. | Medical treatment for marginal ulcers after gastric bypass, consisting of oral proton pump inhibitor (PPI) therapy as the established first-line standard of care. |
| Role in this trial | Tested as an add-on or alternative for patients whose marginal ulcers do not heal adequately with standard PPI therapy after Roux-en-Y gastric bypass. | Used as the initial comparator and routine ulcer care for all eligible trial participants. Patients not healing with PPI may cross over to LTP. |
| Primary use in care | Investigational option to accelerate healing in persistent or refractory marginal ulcers after surgery. | Initial mainstay therapy for post-gastric bypass marginal ulcers, aiming to reduce gastric acid and support ulcer healing. |
| How it is given or performed | Delivered during a scheduled esophagogastroduodenoscopy as pulsed, low-power argon plasma (1 W) applied to the ulcer surface using a flexible probe. | Oral intake of a prescribed proton pump inhibitor once or twice daily, as per standard medical management for marginal ulcers. |
| Evidence status | Effectiveness of LTP for marginal ulcer healing is under clinical investigation and results are not yet established in this patient population. | PPI therapy is supported by clinical experience and guideline-based consensus but healing failures or recurrences still occur with medication alone. |
| Important risks | Potential risks include pain or bleeding at the ulcer site, mucosal injury, or adverse events associated with upper endoscopy and energy application. | Possible adverse effects from prolonged PPI use such as gastrointestinal upset, infection risk, or changes in mineral absorption, but serious events are infrequent. |
| Important limitations | Requires endoscopic procedure, operator skill, and specialized equipment. Real-world effectiveness, especially for complex or large ulcers, remains unproven. | Not all marginal ulcers respond to PPI therapy alone; failures and recurrences may require additional procedures or alternative treatments. |
Disclaimer: This comparison is created with the help of artificial intelligence(AI) and may contain errors or missing information. It is not medical advice and does not mean one option is better or safer than another. Clinical trials are still being studied, and joining a trial is your choice. Please consult your healthcare professional before making any decisions.
You may qualify if you...
You will not qualify if you...
Duration - 2 to 4 weeks
Participants are evaluated to confirm eligibility, including medical history review and initial endoscopy to detect marginal ulcers.
1 visit for initial endoscopy and assessment
Duration - 8 weeks
Participants receive either Low Thermal Plasma treatment plus standard proton pump inhibitor therapy or standard proton pump inhibitor therapy alone. Those not healed after 8 weeks on standard care may crossover to plasma treatment.
Visits at baseline, 4 weeks, and 8 weeks for treatment and assessments
Duration - Up to 8 weeks
Researchers monitor ulcer healing, tissue oxygenation, gastrointestinal symptoms, quality of life, and any adverse events through the 8-week period.
Assessments during treatment visits at 4 and 8 weeks
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
RANDOMIZED
Model
CROSSOVER
Primary Purpose
TREATMENT
Number of Arms
2
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https://pubmed.ncbi.nlm.nih.gov/20204117/Christopher C. Thompson, MD, MSc
Lead Sponsor
Erbe USA Incorporated
Collaborating Sponsor