Comparing two surgical methods for treating type 2 diabetes

Comparisons of Metabolic Effect of Sleeve Gastrectomy With Duodenojejunal Bypass and Sleeve Gastrectomy (MEDUSA): A Multicenter Randomized Controlled Trial

PHASE3 · Seoul National University Bundang Hospital · NCT05211375

This study is testing whether a combined surgery for type 2 diabetes can help people with poor blood sugar control feel better than just one type of surgery alone.

Quick facts

PhasePHASE3
Study typeInterventional
Enrollment130 (estimated)
Ages18 Years and up
SexAll
SponsorSeoul National University Bundang Hospital (other)
Locations1 site (Seongnam-si)
Trial IDNCT05211375 on ClinicalTrials.gov

What this trial studies

This clinical trial compares the metabolic effects of sleeve gastrectomy with duodenojejunal bypass (SG with DJB) against sleeve gastrectomy (SG) alone in patients with type 2 diabetes mellitus (T2DM). It targets individuals with poor blood sugar control despite medical treatment, specifically those who have been using insulin or diabetic medications for less than 10 years. The study aims to determine if SG with DJB provides superior outcomes for T2DM management compared to SG alone, particularly in Asian patients who may have unique metabolic surgery needs. The trial will involve multiple centers and will assess the efficacy of these surgical interventions in improving diabetes control.

Who should consider this trial

Good fit: Ideal candidates are adults over 18 with a BMI of 27.5 kg/m2 or higher, diagnosed with T2DM for 10 years or less, and experiencing poor blood sugar control.

Not a fit: Patients with uncontrolled severe gastroesophageal reflux, previous metabolic surgeries, or significant psychiatric disorders may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved diabetes management and remission for patients with type 2 diabetes.

How similar studies have performed: While there is limited research on SG with DJB specifically for T2DM in Asian populations, similar metabolic surgery approaches have shown promise in other studies.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age over 18 years
* BMI equal to or greater than 27.5 kg/m2
* T2DM duration ≤ 10 years
* Using insulin, or HbA1c ≥ 7.0% while taking diabetes medication
* C-peptide level higher than 1.0 ng/mL
* Presence of type 2 diabetes fulfilling the following criteria
* Consent to not become pregnant for at least 1 year after surgery
* Willingness to provide voluntary informed consent

Exclusion Criteria:

* Presence of uncontrolled severe gastroesophageal reflux (LA classification C or more in esophagogastroduodenoscopy)
* History of previous metabolic surgery for T2DM
* History of gastrointestinal surgery, such as gastrectomy or anti-reflux surgery, which may affect the result of metabolic surgery
* Therapy regimen of more than 3 psychiatric drugs owing to poorly controlled psychiatric disorders
* Suicidal attempts within the last 12 months
* Treatment for alcohol and drug abuse within the last 12 months
* Vulnerability factors (lacking mental capacity, pregnancy or planning of pregnancy, lactation)
* Unsuitability as per the discretion of the researcher

Where this trial is running

Seongnam-si

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: Diabetes Mellitus, Type 2, Bariatric Surgery, Surgical Procedures, Operative, Asians, Metabolic Surgery, Diabetes Remission

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.