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ClinicalTrials.gov public records Last synced Sep 30, 2026, 2:02 AM EDT

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Showing 25–48 of 151 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Roux-en-Y Bypass Clear all
Completed No phase listed Observational

Prophylactic Enoxaparin Dosing in Roux-en-Y Gastric Bypass Surgery Patients at St. Vincent Carmel

NCT01230658
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
Ascension St. Vincent Carmel Hospital
Other
Eligibility
18 Years and older
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Carmel, Indiana
Source: ClinicalTrials.gov public record
Updated Aug 14, 2024 · Synced Sep 30, 2026, 2:02 AM EDT
Completed Phase 1 Interventional

RYGB and the Gastric Adipose Axis

NCT01474785
View directory record Official record
Conditions
Obesity
Interventions
human ghrelin, very low calorie diet, Hyperinsulinemic/Euglycemic Clamp
Drug · Other · Procedure
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 65 Years
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated May 21, 2018 · Synced Sep 30, 2026, 2:02 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Ghrelin and Insulin Resistance

NCT00884494
View directory record Official record
Conditions
Obesity, Insulin Resistance, Normal Weight,Healthy Controls
Interventions
Ghrelin infusion to assess effects on insulin sensitivity
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 20, 2017 · Synced Sep 30, 2026, 2:02 AM EDT
Recruiting Not applicable Interventional

Gut Microbiome and Sex as Risk Factors for Kidney Stones After Bariatric Surgery

NCT04590690
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
Special diet
Other
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 130 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Sep 30, 2026, 2:02 AM EDT
Terminated No phase listed Observational

Study Evaluating Metabolic Syndrome in Subjects Undergoing Gastric Bypass Bariatric Syndrome

NCT00283374
View directory record Official record
Conditions
Morbid Obesity, Metabolic Disease
Interventions
Laparoscopic Roux-en-Y Gastric Bypass
Procedure
Lead sponsor
Wyeth is now a wholly owned subsidiary of Pfizer
Industry
Eligibility
18 Years to 55 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2005
U.S. locations
10
States / cities
Irvine, California • Orange, California • Atlanta, Georgia + 6 more
Source: ClinicalTrials.gov public record
Updated May 18, 2006 · Synced Sep 30, 2026, 2:02 AM EDT
Terminated Not applicable Interventional Results available

StomaphyX Versus Sham for Revisional Surgery in Post-Roux-en-Y Patients to Reduce Regained Weight

NCT00939055
View directory record Official record
Conditions
Obesity
Interventions
StomaphyX, Sham procedure
Device · Procedure
Lead sponsor
EndoGastric Solutions
Industry
Eligibility
18 Years to 64 Years
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
2
States / cities
Columbus, Ohio • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 23, 2020 · Synced Sep 30, 2026, 2:02 AM EDT
Terminated No phase listed Observational

Modeling the Neurological Basis and Characterizing the Neurological Phenotype of Obesity Using Human Neural Stem Cells

NCT03263390
View directory record Official record
Conditions
Obesity, Morbid
Interventions
Bariatric Surgery, Anti Obesity Drugs
Procedure · Drug
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 90 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Dec 16, 2020 · Synced Sep 30, 2026, 2:02 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Skeletal Health in Bariatric Surgery Patients

NCT03331536
View directory record Official record
Conditions
Bariatric Surgery, Osteoporosis, Fractures, Bone, Roux En-Y Gastric Bypass, Sleeve Gastrectomy, Menopause, Premenopause
Interventions
Roux en Y Gastric Bypass Pre-menopausal, Roux en Y Gastric Bypass Post-menopausal, Sleeve Gastrectomy Pre-menopausal, Sleeve Gastrectomy Post-menopausal
Procedure
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years and older · Female only
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 18, 2020 · Synced Sep 30, 2026, 2:02 AM 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 Sep 30, 2026, 2:02 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Investigating the Link Between Type 2 Immunity and NAFLD in Human Obesity

NCT04232566
View directory record Official record
Conditions
Obesity, Morbid, NASH - Nonalcoholic Steatohepatitis, Chronic Inflammation
Interventions
Bariatric surgery
Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
30 Years to 70 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Jan 28, 2026 · Synced Sep 30, 2026, 2:02 AM EDT
Terminated Not applicable Interventional

Early Intervention for Morbidly Obese Patients After Roux-en-Y Gastric Bypass (RYGB) Surgery

NCT01329692
View directory record Official record
Conditions
Weight Loss, Obesity
Interventions
Lifestyle counseling
Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 8, 2012 · Synced Sep 30, 2026, 2:02 AM EDT
Completed No phase listed Observational

Roux-en-Y Gastric Bypass and Weight Regain

NCT02302898
View directory record Official record
Conditions
Obesity
Interventions
Eating Behavior Evaluation, Measurement of Functional gastric volume, Measurement of gastric pouch and GJ size
Behavioral · Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
21 Years to 60 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 9, 2018 · Synced Sep 30, 2026, 2:02 AM 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 Sep 30, 2026, 2:02 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

GI Neuromuscular Pathology Prospective Registry

NCT02165059
View directory record Official record
Conditions
Gastroparesis
Interventions
Surgical Full Thickness Biopsy
Procedure
Lead sponsor
Indiana University
Other
Eligibility
6 Months to 90 Years
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2026
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Sep 30, 2026, 2:02 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Changes in Body Composition Following Bariatric Surgery

NCT02148068
View directory record Official record
Conditions
Obesity
Interventions
Bariatric Surgery
Procedure
Lead sponsor
Peter Nau
Other
Eligibility
18 Years to 65 Years
Enrollment
136 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Nov 20, 2018 · Synced Sep 30, 2026, 2:02 AM EDT
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 Sep 30, 2026, 2:02 AM 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 Sep 30, 2026, 2:02 AM 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 Sep 30, 2026, 2:02 AM EDT
Completed Not applicable Interventional

Randomized Trial Comparing Laparoscopic Roux-en-y Gastric Bypass to Micro-laparoscopic Roux-en-y Gastric Bypass

NCT01183273
View directory record Official record
Conditions
Obesity
Interventions
Microlaparoscopic gastric bypass, Laparoscopic Surgery
Procedure
Lead sponsor
Suzanne J. Rose
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Danbury, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 22, 2014 · Synced Sep 30, 2026, 2:02 AM EDT
Completed No phase listed Observational

Bariatric Surgery and Skeletal Health

NCT01098942
View directory record Official record
Conditions
Morbid Obesity
Interventions
Not listed
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2018
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 21, 2018 · Synced Sep 30, 2026, 2:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of Weight Loss on Myocardial Metabolism and Cardiac Relaxation in Obese Adults

NCT00572624
View directory record Official record
Conditions
Obesity
Interventions
Diet, Gastric bypass surgery
Behavioral · Procedure
Lead sponsor
Washington University School of Medicine
Other
Eligibility
21 Years to 50 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2014
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 15, 2017 · Synced Sep 30, 2026, 2:02 AM EDT
Withdrawn No phase listed Observational

Omega-3 Fatty Acid Status in Morbid Obesity Before and After Surgical Treatment

NCT00558532
View directory record Official record
Conditions
Morbid Obesity, Cardiovascular Disease, Fatty Acid Levels
Interventions
Bariatric Surgery
Procedure
Lead sponsor
University of Cincinnati
Other
Eligibility
Not listed
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 13, 2016 · Synced Sep 30, 2026, 2:02 AM EDT
Completed No phase listed Observational

Laparoscopic Revision From Biliopancreatic Diversion to Gastric Bypass

NCT01041456
View directory record Official record
Conditions
Metabolic and Nutritional Complications, Protein Malnutrition, Intestinal Malabsorptive Syndrome, Metabolic Bone Disease
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Jan 1, 2010 · Synced Sep 30, 2026, 2:02 AM EDT
Completed No phase listed Observational

Metabolomics of Roux-en-Y Gastric Bypass (RYGB) With Gastrostomy

NCT00887302
View directory record Official record
Conditions
Type II Diabetes Mellitus, Obesity
Interventions
Gastric Band, Gastric Sleeve, Gastrostomy Tube
Procedure
Lead sponsor
East Carolina University
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Greenville, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 6, 2023 · Synced Sep 30, 2026, 2:02 AM EDT