Comparing two surgical methods for treating severe obesity

Randomized Clinical Trial Comparing Two Surgical Techniques for the Treatment of Type III Obesity (BMI 40-50 kg/m2): Single Anastomosis Duodeno-ileal Bypass With Sleeve Gastrectomy (SADI-S) and Roux-en-Y Gastric Bypass (RY-GBP)

NA · Hospital Clinic of Barcelona · NCT06789965

This study is testing two different weight loss surgeries for people with severe obesity to see which one helps them lose weight better and causes fewer problems afterward.

Quick facts

PhaseNA
Study typeInterventional
Enrollment450 (estimated)
Ages18 Years to 60 Years
SexAll
SponsorHospital Clinic of Barcelona (other)
Locations1 site (Barcelona, Barcelona)
Trial IDNCT06789965 on ClinicalTrials.gov

What this trial studies

This study compares two surgical techniques for treating Type III obesity, specifically Single Anastomosis Duodenoileal Bypass with Sleeve Gastrectomy (SADI-S) and Roux-en-Y Gastric Bypass (RY-GBP). Both methods aim to reduce stomach size and limit calorie absorption, but their effectiveness in postoperative weight control and complications will be analyzed. The study is crucial as obesity is a growing epidemic, and understanding the best surgical approach could significantly impact patient outcomes. Participants will be monitored for weight loss and any gastroesophageal issues following the procedures.

Who should consider this trial

Good fit: Ideal candidates for this study are adults aged 18 to 60 with a BMI between 40 and 50 kg/m2 who are suitable for mixed bariatric surgery.

Not a fit: Patients outside the age range of 18 to 60 or with a BMI below 40 kg/m2 or above 50 kg/m2 will not benefit from this study.

Why it matters

Potential benefit: If successful, this study could identify the more effective surgical technique for weight loss and improved health outcomes in patients with severe obesity.

How similar studies have performed: While both surgical techniques have been used in practice, there is limited comparative data on their effectiveness, making this study a novel approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* BMI 40 - 50 Kg/m2
* Candidates to mixed bariatric surgery

Exclusion Criteria:

* \< 18 years.
* \> 60 years.
* BMI \< 40 Kg/m2
* BMI \> 50 Kg/m2.
* Non-candidates to mixed bariatric surgery.

Where this trial is running

Barcelona, Barcelona

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Obesity, obesity, sadi-s, ry-gbp, weight loss, metabolic complications, sadis, gbp

Last reviewed 2026-05-15 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.