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ClinicalTrials.gov public records Last synced Sep 30, 2026, 5:53 PM EDT

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Showing 73–96 of 213 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Gastric Bypass Clear all
Completed No phase listed Observational Accepts healthy volunteers

Gut Microbiota Post Roux-en-Y Gastric Bypass Surgery

NCT02654496
View directory record Official record
Conditions
Obesity
Interventions
Meal challenge
Other
Lead sponsor
North Dakota State University
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Aug 23, 2018 · Synced Sep 30, 2026, 5:53 PM EDT
Completed Phase 1Phase 2 Interventional

Use of MCT Oil for Enhancement of Weight Loss and Glycemic Control in Obese Diabetic Patients

NCT00207233
View directory record Official record
Conditions
Obesity, Type 2 Diabetes Mellitus
Interventions
MCT oil hypocaloric liquid diet, LCT hypocaloric liquid diet, Subcutaneous abdominal adipose tissue biopsy
Behavioral · Procedure
Lead sponsor
Boston Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2009
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 25, 2011 · Synced Sep 30, 2026, 5:53 PM EDT
Completed No phase listed Observational

Reversal of Obesity Cardiomyopathy

NCT01372397
View directory record Official record
Conditions
Cardiomyopathy
Interventions
Not listed
Lead sponsor
Washington University School of Medicine
Other
Eligibility
35 Years to 65 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 14, 2024 · Synced Sep 30, 2026, 5:53 PM EDT
Completed Early Phase 1 Interventional

The Contribution of Incretin Hormones to the Amelioration of Glucose Metabolism After Roux-en-Y Gastric Bypass

NCT01843855
View directory record Official record
Conditions
Type 2 Diabetes Mellitus
Interventions
Exendin 9,39, Placebo
Drug
Lead sponsor
Adrian Vella
Other
Eligibility
20 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 4, 2013 · Synced Sep 30, 2026, 5:53 PM EDT
Completed No phase listed Observational

Retrospective Comparison of Lap and Robotic-Assisted RYGB and SG

NCT04329780
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
Not listed
Lead sponsor
Intuitive Surgical
Industry
Eligibility
18 Years and older
Enrollment
1,872 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Apr 13, 2025 · Synced Sep 30, 2026, 5:53 PM EDT
Terminated No phase listed Observational

A Study to Examine Changes in GIP Plasma Levels Following Gastric Bypass Surgery in Obese Patients

NCT00207389
View directory record Official record
Conditions
Obesity, Type 2 Diabetes Mellitus, Insulin Resistance
Interventions
Not listed
Lead sponsor
Boston Medical Center
Other
Eligibility
21 Years to 64 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 26, 2017 · Synced Sep 30, 2026, 5:53 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 Sep 30, 2026, 5:53 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 Sep 30, 2026, 5:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Endoscopic Suturing System for Tissue Apposition

NCT00495222
View directory record Official record
Conditions
Obesity
Interventions
Tissue plication, Endoscopic Suturing System, Tissue Plication
Procedure · Device
Lead sponsor
Ethicon Endo-Surgery
Industry
Eligibility
21 Years to 65 Years
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 10, 2009 · Synced Sep 30, 2026, 5:53 PM EDT
Completed Phase 2 Interventional

Medically Reproducing Bariatric Surgery

NCT03225209
View directory record Official record
Conditions
Type 2 Diabetes Mellitus
Interventions
OPTIFAST
Other
Lead sponsor
Moahad S Dar
Other
Eligibility
25 Years to 70 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
Greenville, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 31, 2020 · Synced Sep 30, 2026, 5:53 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Mechanisms of Post-Bariatric Hypoglycemia

NCT04428866
View directory record Official record
Conditions
Hypoglycemia
Interventions
Continuous Glucose Monitoring, activity monitor, Mixed meal tolerance test, Glucagon Sensitivity Testing, Hypoglycemic Hyperinsulinemic Clamp, analysis of fecal microbiome
Diagnostic Test
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
18 Years to 70 Years
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 5, 2024 · Synced Sep 30, 2026, 5:53 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Use of Oral Probiotics to Reduce Urinary Oxalate Excretion

NCT00587041
View directory record Official record
Conditions
Nephrolithiasis, Hyperoxaluria, Crohn's Disease
Interventions
Oxadrop, Agri-King Synbiotic (AKSB), Placebo
Dietary Supplement · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 31, 2012 · Synced Sep 30, 2026, 5:53 PM EDT
Active, not recruiting No phase listed Observational

Transoral Fundoplication Prior to Sleeve Gastrectomy Versus RNY Gastric Bypass on GERD Symptoms in Bariatric Patients

NCT05365087
View directory record Official record
Conditions
Gastroesophageal Reflux Disease
Interventions
Transoral Fundoplication and Sleeve Gastrectomy, Gastric Bypass
Procedure
Lead sponsor
Lexington Health Incorporated
Other
Eligibility
18 Years and older
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2032
U.S. locations
1
States / cities
West Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated May 8, 2025 · Synced Sep 30, 2026, 5:53 PM EDT
Active, not recruiting Not applicable Interventional

The TRIABETES - ARMMS-T2D Study: A Randomized Trial to Compare Surgical and Medical Treatments for Type 2 Diabetes

NCT01047735
View directory record Official record
Conditions
Type 2 Diabetes Mellitus, Obesity
Interventions
Roux-en-Y Gastric Bypass Surgery, Laparoscopic Adjustable Gastric Banding, Lifestyle Weight Loss Intervention
Procedure · Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
25 Years to 55 Years
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2028
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Sep 30, 2026, 5:53 PM EDT
Not listed Phase 3 Interventional

Randomized Controlled Trial of Laparoscopic Gastric Bypass Plus Omentectomy Versus Laparoscopic Gastric Bypass Alone in Improving Diabetic Indices

NCT00552942
View directory record Official record
Conditions
Diabetes, Interleukins, Cytokines
Interventions
laparoscopic gastric bypass plus omentectomy
Procedure
Lead sponsor
Legacy Health System
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Nov 2, 2007 · Synced Sep 30, 2026, 5:53 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Perioperative Ketamine for Pain With Gastric Bypass

NCT03448068
View directory record Official record
Conditions
Laparoscopic Gastric Bypass Surgery, Ketamine
Interventions
Ketamine, Standard therapy
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 69 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Apr 29, 2021 · Synced Sep 30, 2026, 5:53 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Study on the Use of Low Dose Ketamine After Gastric Bypass and Gastrectomy

NCT02452060
View directory record Official record
Conditions
Pain, Postoperative Depression
Interventions
Ketamine, Placebo Comparator
Drug · Other
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 65 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 16, 2020 · Synced Sep 30, 2026, 5:53 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

A Retrospective Multicenter Comparison of Laparoscopic and Robotic-Assisted Roux-en-Y Gastrectomy

NCT05224791
View directory record Official record
Conditions
Laparoscopic Sleeve Gastrectomy, Sleeve Gastrectomy
Interventions
Roux-en-Y Gastric Bypass, Sleeve Gastrectomy
Procedure
Lead sponsor
Methodist Health System
Other
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Mar 28, 2024 · Synced Sep 30, 2026, 5:53 PM EDT
Completed Not applicable Interventional Results available

Hepatic Effects of Gastric Bypass Surgery

NCT00701376
View directory record Official record
Conditions
Liver Diseases
Interventions
liver biopsy
Other
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
106 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 19, 2020 · Synced Sep 30, 2026, 5:53 PM EDT
Completed No phase listed Observational

Simplified Technique for Performing Laparoscopic Gastric Bypass

NCT06782256
View directory record Official record
Conditions
Gastric Bypass, Morbid Obesity
Interventions
Not listed
Lead sponsor
Madigan Army Medical Center
Federal
Eligibility
18 Years and older
Enrollment
140 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Jan 17, 2025 · Synced Sep 30, 2026, 5:53 PM EDT
Recruiting Not applicable Interventional

Enteral Anastomosis for the Treatment of Gastric Outlet Obstruction: A Randomized Controlled Study Comparing Endoscopic Versus Surgical Gastrojejunostomy

NCT05561907
View directory record Official record
Conditions
Gastric Outlet Obstruction
Interventions
Surgical gastrojejunostomy (SGJ), Endoscopic gastrojejunostomy (EGJ)
Procedure
Lead sponsor
Northwell Health
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
4
States / cities
New Brunswick, New Jersey • Manhasset, New York • New Hyde Park, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Sep 30, 2026, 5:53 PM EDT
Completed No phase listed Observational

Laparoscopic Revision Gastric Bypass for Inadequate Initial Weight Loss

NCT01040377
View directory record Official record
Conditions
Inadequate Initial Weight Loss, Persistent Clinically Severe Obesity
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Dec 29, 2009 · Synced Sep 30, 2026, 5:53 PM EDT
Completed Phase 4 Interventional Results available

Preoperative Pain Control in Gastric Bypass Surgery Patients

NCT01801189
View directory record Official record
Conditions
Post-operative Pain
Interventions
Pregabalin, Placebo (for Pregabalin)
Drug
Lead sponsor
Legacy Health System
Other
Eligibility
18 Years to 70 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jul 14, 2022 · Synced Sep 30, 2026, 5:53 PM EDT
Not yet recruiting Phase 4 Interventional Accepts healthy volunteers

Metabolic Surgery for Atrial Fibrillation Elimination

NCT07027969
View directory record Official record
Conditions
Atrial Fibrillation, Obesity and Obesity-related Medical Conditions
Interventions
Roux-en-Y Gastric Bypass or Sleeve Gastrectomy, Anti-Obesity Medication (AOM) treatment
Procedure · Drug
Lead sponsor
Ali Aminian
Other
Eligibility
18 Years to 80 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2030
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 17, 2026 · Synced Sep 30, 2026, 5:53 PM EDT