Clinical trial Recruiting at 1 site Interventional Ages 18 to 65

Comparing two types of gastric bypass surgery for obesity treatment

Official title: Randomized Controlled Non-inferiority Trial Evaluating the Safety and Efficacy of the Omega Gastric Bypass With 150 cm Biliopancreatic Loop Length Compared to the Roux-en-Y Gastric Bypass

Run by Assistance Publique - Hôpitaux de Paris · NCT06057597 · Data updated 2026-11-12

This study is testing whether a new type of gastric bypass surgery works better than the traditional method for helping people with severe obesity and related health issues.

More Obesity trials

Quick facts

Study typeInterventional
Ages18 Years to 65 Years
SexAll
Enrollment368 (estimated)
SponsorAssistance Publique - Hôpitaux de Paris
Academic / other
Locations1 site (Paris)
StatusRecruiting
StartedNovember 13, 2023
Main results expectedOctober 1, 2028
Study endsDecember 1, 2028
Registry record updatedFebruary 27, 2026
Trial IDNCT06057597 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 to 65 with morbid obesity (BMI ≥ 40 kg/m²) or severe obesity (BMI 35-40 kg/m²) with related health conditions.

Probably not a fit

Patients with a history of previous bariatric surgery or chronic inflammatory bowel disease may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial compares the effectiveness of Omega Gastric Bypass (OAGB) to the traditional Roux-en-Y Gastric Bypass (RYGB) in treating morbid obesity and its associated health conditions. The study aims to evaluate weight loss outcomes and improvements in obesity-related co-morbidities such as type 2 diabetes and high blood pressure. Participants will undergo laparoscopic surgery and receive nutritional education and monitoring post-operation. The trial is conducted in France, where bariatric surgery is a common intervention for obesity.

Why it matters

Potential benefit: If successful, this study could provide patients with a more effective surgical option for significant weight loss and improvement in obesity-related health issues.

How similar studies have gone: Other studies have shown promising results with various bariatric surgery techniques, indicating that this approach may lead to significant advancements in obesity treatment.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patient aged from 18 to 65 years old
* Type III obesity (BMI ≥ 40 kg/m²), or Type II obesity BMI 35-40 kg/m2 associated with at least one co-morbidity which will be improved by surgery (high blood pressure, type 2 diabetes mellitus, obstructive sleep apnea, dyslipidemia, arthrosis)
* Patient who had benefited from an Upper GI Endoscopy with biopsies to look for Helicobacter pylori within 12 months before surgery
* Patient who has benefited from a multidisciplinary evaluation at least 6 months, with a favorable opinion for a gastric bypass
* Patient who understood and accepted the need for a long-term follow-up
* Patient who agreed to be included in the study and who signed the informed consent form
* Patient affiliated to a social security scheme
* For child-bearing aged women, efficient contraception

Exclusion Criteria:

* History of previous bariatric surgery
* History of chronic inflammatory bowel disease
* Presence of chronic diarrhea
* Presence of a severe and evolutive life threatening pathology
* Presence of dysplastic modifications of the gastric mucosa, chronic atrophic gastritis or history of gastric cancer
* Presence of an unhealed gastro-duodenal ulcer
* Presence of Helicobacter pylori resistant to medical treatment
* Presence of esophagitis
* Pregnancy or desire to be pregnant during the study
* Mentally unbalanced patients, under supervision or guardianship
* Patients who don't understand French and not able to give consent
* Patient included and followed in another interventional trial
* Unable to consent, under tutelage or curatorship, or judiciary safeguard
* Presence of type 1 diabetes

Where it's running

  • Hôpital Bichat Claude-Bernard
    Paris, France
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.