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ClinicalTrials.gov public records Last synced Oct 10, 2026, 1:31 PM EDT

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Showing 25–48 of 261 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Roux-en-Y Gastric Bypass Clear all
Completed No phase listed Observational

The Long Term Impact of Bariatric Surgery on Quality of Life

NCT01722279
View directory record Official record
Conditions
Obesity
Interventions
Bariatric surgery
Procedure
Lead sponsor
Ascension St. Vincent Carmel Hospital
Other
Eligibility
18 Years and older
Enrollment
414 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Carmel, Indiana
Source: ClinicalTrials.gov public record
Updated Nov 6, 2012 · Synced Oct 10, 2026, 1:31 PM EDT
Completed Phase 3 Interventional

Impact of Gastric Bypass Surgery on Risk of CVD in Type 2 Diabetes Mellitus

NCT00444392
View directory record Official record
Conditions
Obese Patients, Type 2 Diabetes Mellitus
Interventions
Calorie controlled diabetic diet for the control patients
Behavioral
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 60 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Nov 21, 2016 · Synced Oct 10, 2026, 1:31 PM EDT
Completed No phase listed Observational

Internal Hernias After Laparoscopic Gastric Bypass

NCT01040364
View directory record Official record
Conditions
Internal Hernia, Mesocolic Hernia, Petersen´s Hernia, Jejunojejunostomy Hernia, Bowel Obstruction, Ischemic Bowel
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Enrollment
220 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Sep 24, 2013 · Synced Oct 10, 2026, 1:31 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

A Prospective Study Evaluating The Utility of Transnasal Endoscopy With Roux en Y Gastric Bypass

NCT01526772
View directory record Official record
Conditions
Obesity
Interventions
Endoscopy
Procedure
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 85 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 7, 2017 · Synced Oct 10, 2026, 1:31 PM EDT
Completed Not applicable Interventional

Post-Gastric Bypass Hypoglycemia

NCT01933490
View directory record Official record
Conditions
Hyperinsulinemic Hypoglycemia
Interventions
high carbohydrate test meal, high carbohydrate test meal after pre-treatment with rapid acting aspart insulin, high fructose , low glucose test meal with carbohydrate and caloric content similar to the control meal
Other
Lead sponsor
University of Minnesota
Other
Eligibility
21 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 1, 2019 · Synced Oct 10, 2026, 1:31 PM EDT
Terminated No phase listed Observational

Studies of Biological Changes Related to Weight Loss After Gastric Bypass Surgery

NCT00120562
View directory record Official record
Conditions
Obesity, Morbid Obesity, Weight Loss
Interventions
Gastric Bypass Surgery
Procedure
Lead sponsor
Rockefeller University
Other
Eligibility
18 Years to 65 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2007
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 28, 2009 · Synced Oct 10, 2026, 1:31 PM EDT
Terminated Not applicable Interventional

Roux-en-Y Gastric Bypass Versus Loop Gastrojejunostomy for Malignant Gastric Outlet Obstruction

NCT05986890
View directory record Official record
Conditions
Malignant Gastric Outlet Obstruction
Interventions
Roux-en-Y Bypass, gastrojejunostomy
Procedure
Lead sponsor
Corewell Health West
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Grand Rapids, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Oct 10, 2026, 1:31 PM EDT
Completed Not applicable Interventional

Mechanisms of Diabetes Relapse After Bariatric Surgery

NCT01516320
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Roux-en-Y Gastric Bypass, Laparoscopic adjustable gastric banding, Vertical Sleeve Gastrectomy
Procedure
Lead sponsor
Blandine Laferrere
Other
Eligibility
18 Years to 65 Years
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 1, 2017 · Synced Oct 10, 2026, 1:31 PM EDT
Completed Not applicable Interventional

Endoscopic Stomach and Pouch Reduction in Patients With Weight Regain Following Roux-En-Y Bypass Surgery

NCT00411489
View directory record Official record
Conditions
Obesity
Interventions
endolumenal surgery
Procedure
Lead sponsor
USGI Medical
Industry
Eligibility
18 Years to 64 Years
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
4
States / cities
Burlington, Massachusetts • New York, New York • Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Mar 18, 2008 · Synced Oct 10, 2026, 1:31 PM EDT
Completed Not applicable Interventional Results available

Treatment of Diabetes After Gastric Bypass With Sitagliptin

NCT01512797
View directory record Official record
Conditions
Type 2 Diabetes Mellitus
Interventions
Sitagliptin phosphate, Placebo
Drug · Other
Lead sponsor
Blandine Laferrere
Other
Eligibility
18 Years to 70 Years
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 22, 2019 · Synced Oct 10, 2026, 1:31 PM EDT
Active, not recruiting Not applicable Interventional

Napoleon Measurement of Gastrojejunal Anastomosis

NCT04832282
View directory record Official record
Conditions
Gastric Bypass, Weight Regain
Interventions
Napoleon, Visual estimation
Device · Other
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 90 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
2
States / cities
Boston, Massachusetts • New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 23, 2025 · Synced Oct 10, 2026, 1:31 PM EDT
Completed Phase 1 Interventional

To Define the Role of GLP-1 for Improving Glucose Homeostasis in Humans Following Gastric Bypass Surgery

NCT02204813
View directory record Official record
Conditions
Bypass, Gastric, Roux-en-Y Gastric Bypass, Vertical Sleeve Gastrectomy, Gastric Banding, Bariatric Surgery
Interventions
Placebo, Lo-Xenin, Hi-Xenin, Extra Hi-Xenin
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 65 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 27, 2018 · Synced Oct 10, 2026, 1:31 PM EDT
Completed Phase 3 Interventional

Surgery Or Lifestyle Intervention for Type 2 Diabetes (SOLID)

NCT01040468
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Roux-en-Y Gastric Bypass surgery, Laparoscopic Adjustable Gastric Banding surgery, Intensive Lifestyle Modification
Procedure · Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 65 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2015
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 19, 2016 · Synced Oct 10, 2026, 1:31 PM EDT
Recruiting Not applicable Interventional

Randomized Study on Transoral Outlet Reduction and Lifestyle Changes for Weight Regain After Gastric Bypass

NCT07015424
View directory record Official record
Conditions
Weight Regain, Weight Loss
Interventions
TORe with OverStitch, Intensive lifestyle modification
Device · Behavioral
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
18 Years and older
Enrollment
108 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
12
States / cities
Irvine, California • Stanford, California • Jacksonville, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Sep 16, 2026 · Synced Oct 10, 2026, 1:31 PM EDT
Completed No phase listed Observational

Endotoxin and Intestinal Flora Before and After Gastric Bypass or Banding in Diabetics

NCT00960765
View directory record Official record
Conditions
Obesity, Morbid, Diabetes Mellitus, Type 2, Gastric Bypass
Interventions
Not listed
Lead sponsor
CPL Associates
Other
Eligibility
18 Years to 95 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2015
U.S. locations
2
States / cities
Buffalo, New York • Williamsville, New York
Source: ClinicalTrials.gov public record
Updated Jan 28, 2016 · Synced Oct 10, 2026, 1:31 PM EDT
Completed Not applicable Interventional

Weight Loss-Independent Metabolic Effects of Roux-En-Y Gastric Bypass in Diabetes

NCT02207777
View directory record Official record
Conditions
Obesity, Type 2 Diabetes
Interventions
Roux-en-Y gastric bypass surgery, Low-calorie diet
Procedure · Behavioral
Lead sponsor
Washington University School of Medicine
Other
Eligibility
25 Years to 65 Years
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 20, 2025 · Synced Oct 10, 2026, 1:31 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Use of Radiofrequency Ablation for RGB Salvage

NCT01910688
View directory record Official record
Conditions
Obesity
Interventions
RFA treatment
Device
Lead sponsor
Medtronic - MITG
Industry
Eligibility
18 Years to 70 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
2
States / cities
Lebanon, New Hampshire • New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 24, 2016 · Synced Oct 10, 2026, 1:31 PM EDT
Completed Not applicable Interventional Results available

Surgery or Lifestyle With Intensive Medical Management in the Treatment of Type 2 Diabetes

NCT01073020
View directory record Official record
Conditions
Type 2 Diabetes Mellitus, Obesity
Interventions
Allergan Adjustable Gastric Band Surgery, Intensive Medical Diabetes & Weight Management (Why WAIT) - Band Group, Roux-en-Y Gastric Bypass (RYGB) Surgery, Intensive Medical Diabetes & Weight Management (Why WAIT) - Bypass Group
Device · Other · Procedure
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
21 Years to 65 Years
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 28, 2021 · Synced Oct 10, 2026, 1:31 PM EDT
Completed Not applicable Interventional Results available

Pancreatic Enzymes to Restore Digestive Function in Malnourished Gastric Bypass Patients

NCT00510744
View directory record Official record
Conditions
Obesity
Interventions
pancreatic enzyme supplement
Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 65 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2015
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 2, 2016 · Synced Oct 10, 2026, 1:31 PM EDT
Terminated No phase listed Observational Results available

Metabolic Factors of Outcomes From Gastric Bypass Surgery

NCT01347840
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
Ethicon Endo-Surgery
Industry
Eligibility
18 Years to 65 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated May 21, 2012 · Synced Oct 10, 2026, 1:31 PM EDT
Enrolling by invitation No phase listed Observational

Physiologic and Functional Adaptations of Insulin Sensitive Tissues

NCT03407833
View directory record Official record
Conditions
Diabetes, Insulin Resistance, Obesity, Bariatric Surgery Candidate, Roux-en-y Gastric Bypass, Liver Diseases
Interventions
Endoscopy biopsy, Surgical biopsy, Mixed-meal tolerance test, Excised Liver Tissue Sampling
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2028
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 18, 2025 · Synced Oct 10, 2026, 1:31 PM EDT
Completed No phase listed Observational

Effect of Gastric Bypass-induced Weight Loss on Myocardial Structure, Function and Metabolism

NCT00841009
View directory record Official record
Conditions
Obesity, Gastric Bypass
Interventions
Not listed
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 55 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2014
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 4, 2016 · Synced Oct 10, 2026, 1:31 PM EDT
Completed No phase listed Observational

Mechanisms of Glycemic Improvement After Gastrointestinal Surgery

NCT01025999
View directory record Official record
Conditions
Diabetes Mellitus, Type II
Interventions
No intervention
Other
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Mar 31, 2016 · Synced Oct 10, 2026, 1:31 PM EDT
Completed Not applicable Interventional

Changes in Gut Hormones, Body Composition and Energy Expenditure After Roux-en-Y

NCT02048501
View directory record Official record
Conditions
Obesity, Weight Loss
Interventions
Resting Metabolic Rate (RMR), Duel-energy x-ray absorptiometry (DEXA), Visual Analog Scale (VAS), Meal Stimulation Test
Other
Lead sponsor
Duke University
Other
Eligibility
18 Years to 65 Years
Enrollment
57 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 26, 2017 · Synced Oct 10, 2026, 1:31 PM EDT