Gastric Bypass Clinical Trials
Clinical trials related to Gastric Bypass Procedure
Last Updated: 04/28/2026
The Bialystok Bariatric Surgery Study
Summary: The Bialystok Bariatric Surgery Study (BBSS) is a prospective observational cohort study of patients undergoing bariatric surgery at the First Clinical Department of General and Endocrine Surgery at the Medical University of Bialystok. The BBSS consists of a battery of baseline tests established one month prior to the surgery and repeated at one, three, six, twelve and twenty four-month follow-up ...
Prospective Multicentric, Open Label, Randomized Clinical Trial of Superiority, With Two Arms, Comparing Bariatric Surgery to the Recommended Medical Treatment for NASH
Summary: The aim of the study is to demonstrate the superiority of bariatric surgery on the disappearance of NASH without worsening of fibrosis in comparison to medical standard treatment in obese patients (35 kg/m² \> BMI ≥ 30 kg/m²) with NASH complicated of advanced fibrosis (F3 and F4 fibrosis grade according to Brunt score).
Prospective, Randomized Clinical Study Evaluating Transoral Outlet Reduction (TORe) and Lifestyle Modification for Patients With Weight Regain Following Roux-en-Y Gastric Bypass
Summary: The goal of this clinical trial is to evaluate weight loss with TORe and intensive lifestyle modification versus intensive lifestyle modification alone in subjects who have regained weight following a Roux-en-Y gastric bypass. Participants will randomized 2:1. Those randomized to the TORe arm will receive a TORe procedure and intensive lifestyle modification which consists of a well-balanced calor...
Randomised Controlled Trial Evaluating the Impact of a Pro-diversity Gut Microbiota Diet on Gut Microbiota, Eating Behaviour and Sensory Function in Patients Who Have Undergone Bariatric Surgery
Summary: Bariatric surgery is the most effective treatment for long-term weight loss and reducing obesity-related health risks. It alters the gastrointestinal tract as well as metabolic and hormonal functions, influencing eating behaviour. However, weight loss outcomes and long-term maintenance vary between patients, likely due to changes in the gut microbiota. Dietary recommendations aimed at improving mi...
Efficacy and Safety of Bariatric Surgery, Semaglutide Once Weekly, and Tirzepatide Once Weekly in Patients With Obesity
Summary: The recent introduction of the new generation of anti-obesity medications (AOMs) will change the future of obesity treatment. These highly effective medications, such as high-dose semaglutide and tirzepatide, are hormone analogues that augment the incretin function and exert multiple physiological effects by activating glucagon-like peptide-1 (GLP-1) and/or glucose-dependent insulinotropic polypep...
The Impact of Stapler Reinforcement Patches Compared to Standard Staplers on Postoperative Complications in Gastrojejunostomy: A Multicenter Randomized Controlled Trial
Summary: This is a multi-center, prospective, randomized controlled study aimed at compareing the impact of stapler reinforcement patches versus standard staplers on postoperative complications in gastrojejunostomy.
Effect of Limb Length Ratio on Roux-en-Y Gastric Bypass Outcomes (CLIMB II Study)
Summary: The investigators propose a randomized controlled trial comparing BP and roux limb lengths measuring 30 and 15% respectively of patient's total small bowel length versus current standard practice using fixed lengths. The findings would provide further insight into feasibility of standardizing RYGB limb lengths and optimizing resultant weight loss and metabolic effects. The investigators hypothesiz...
OPEN Versus InTact Capsule Proton Pump Inhibitors for the Treatment of Marginal Ulcers After Bariatric Surgery
Summary: The goal of this clinical trial is to identify the most effective way to take acid-blocking medications to treat stomach ulcers in patients who have undergone gastric bypass surgery. The main questions it aims to answer are: * is taking an acid-blocking medication by opening the capsule and only taking the contents of the capsule (open-capsule) more or less effective than taking the capsule as a w...
Adherence to an Exercise Program and Pre-Post Changes in Muscle Quality, Body Composition, and Functional Capacity After Bariatric Surgery: A Quasi-Experimental Study
Summary: This study will examine within-subject (pre-post) changes in muscle quality, body composition, and functional response following a concurrent exercise program (aerobic + resistance training) in individuals after bariatric surgery. This is a single-center, prospective, longitudinal, quasi-experimental study with a one-group pre-post design. Men and women aged 18 to 60 years who have undergone sleev...
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
Summary: Obesity with its consequences such as type 2 diabetes, high blood pressure, dyslipidemia, fatty liver disease, sleep apnea and cancers, remains a major healthcare problem worldwide. Bariatric surgery, combined with nutritional education and close monitoring, has been shown to be the most effective treatment for patients with morbid obesity resulting in significant and lasting weight loss and impro...
A Prospective Randomized Study Evaluating the Efficacy and Safety of the iCan i3 Continuous Glucose Monitoring System in Post-Bariatric Patients With Late Dumping Syndrome
Summary: Late dumping syndrome is a common complication following Roux-en-Y gastric bypass, characterized by postprandial hypoglycemia with significant impact on patient safety and quality of life. Traditional capillary glucose monitoring has limited ability to detect rapid glycemic fluctuations. This prospective randomized study aims to evaluate the efficacy and safety of the iCan i3 continuous glucose mo...
Bariatric Surgery for the Reduction of cArdioVascular Events Randomized Controlled Trial
Summary: The primary objective of this study is to evaluate if, in patients with severe obesity (body mass index (BMI) ≥30 kg/m2) and high-risk cardiovascular disease (CVD), bariatric surgery compared to medical weight management (MWM) safely reduces the risk of major cardiovascular events. The cost-effectiveness of bariatric surgery will also be examined. Separate sub-studies will be performed to examine ...
Last Updated: 04/28/2026