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ClinicalTrials.gov public records Last synced Jun 10, 2026, 11:37 AM EDT

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Showing 1–24 of 201 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Roux en Y Gastric Bypass Clear all
Withdrawn Phase 1 Interventional

Bariatric Surgery Telemedicine Study

NCT01378897
View directory record Official record
Conditions
Obesity
Interventions
MedSignals®pillbox,Omron pedometer,VitalSignals®weight scale
Device
Lead sponsor
Baystate Medical Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011
U.S. locations
1
States / cities
Springfield, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 10, 2016 · Synced Jun 10, 2026, 11:37 AM EDT
Completed Not applicable Interventional

The Effect of Physical Activity in Individuals With Post-bariatric Hypoglycemia

NCT05560789
View directory record Official record
Conditions
Hypoglycemia, Roux-en-Y Gastric Bypass, Post-bariatric Hypoglycemia, Physical Activity
Interventions
Physical activity (cycling on a stationary bicycle ergometer or walking on a treadmill)
Behavioral
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
18 Years to 60 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 7, 2024 · Synced Jun 10, 2026, 11:37 AM EDT
Completed Not applicable Interventional

Effect of Meal Number, Frequency, and Form on Satiety and Metabolism After Weight Loss Surgery

NCT01938469
View directory record Official record
Conditions
Gastric Bypass Surgery, Obesity
Interventions
Liquid Meal, Solid Meal
Other
Lead sponsor
St. Luke's-Roosevelt Hospital Center
Other
Eligibility
21 Years to 60 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 28, 2016 · Synced Jun 10, 2026, 11:37 AM EDT
Completed No phase listed Observational

Microenvironment of Adipose Tissue in Endocannabinoid System

NCT00978289
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
Vanderbilt University
Other
Eligibility
20 Years to 60 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 18, 2013 · Synced Jun 10, 2026, 11:37 AM 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 12, 2025 · Synced Jun 10, 2026, 11:37 AM EDT
Completed No phase listed Observational

Adolescent Gastric By-pass and Diabetic Precursors

NCT00360373
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
15 Years to 45 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2012
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 5, 2014 · Synced Jun 10, 2026, 11:37 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Prospective Study of Hormone Levels After Bariatric Surgery

NCT00627315
View directory record Official record
Conditions
Obesity
Interventions
Gastric bypass, Gastric banding
Procedure
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
236 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 18, 2019 · Synced Jun 10, 2026, 11:37 AM 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 25, 2017 · Synced Jun 10, 2026, 11:37 AM EDT
Completed Not applicable Interventional

DSS: Diabetes Surgery Study - Intensive Medical Management of Type 2 Diabetes, With and Without Gastric Bypass Surgery

NCT00641251
View directory record Official record
Conditions
Type 2 Diabetes, Cardiovascular Disease
Interventions
intensive medical management, RYGB & IMM
Other
Lead sponsor
Medtronic - MITG
Industry
Eligibility
30 Years to 67 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2016
U.S. locations
3
States / cities
Minneapolis, Minnesota • Rochester, Minnesota • New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 28, 2017 · Synced Jun 10, 2026, 11:37 AM EDT
Recruiting Not applicable Interventional

Truncal Vagotomy in Patients Undergoing Revisional Sleeve Gastrectomy to Gastric Bypass

NCT04901429
View directory record Official record
Conditions
GERD
Interventions
Truncal vagotomy
Procedure
Lead sponsor
Baylor Research Institute
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2028
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated May 24, 2025 · Synced Jun 10, 2026, 11:37 AM EDT
Completed Not applicable Interventional Results available

Transcranial Magnetic Stimulation Effects on Pain Perception

NCT01861574
View directory record Official record
Conditions
Gastric Bypass Surgery Pain Management
Interventions
Real TMS 45 min, Sham TMS 45 min, Real TMS 4 Hours, Sham TMS 4 Hours
Device
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 60 Years
Enrollment
108 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2011
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Sep 26, 2018 · Synced Jun 10, 2026, 11:37 AM 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 15, 2020 · Synced Jun 10, 2026, 11:37 AM EDT
Recruiting No phase listed Observational

Quantitative Neuromuscular Monitoring and Gastric Bypass Surgery

NCT05886218
View directory record Official record
Conditions
Sugammadex
Interventions
Quantitative Neuromuscular Function Monitoring
Device
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
215 participants
Timeline
2023 – 2025
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 14, 2025 · Synced Jun 10, 2026, 11:37 AM 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 30, 2020 · Synced Jun 10, 2026, 11:37 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Postprandial Nutrient Homeostasis Before and After Weight Loss Induced by Low-calorie Diet or RYGB

NCT03091725
View directory record Official record
Conditions
Obesity
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
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2026
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Jun 10, 2026, 11:37 AM 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 25, 2017 · Synced Jun 10, 2026, 11:37 AM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

Endostapler Gastric Bypass Study

NCT04712526
View directory record Official record
Conditions
Obesity
Interventions
AEON Endostapler
Device
Lead sponsor
Lexington Medical Inc.
Industry
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Holyoke, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 3, 2023 · Synced Jun 10, 2026, 11:37 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Preliminary Comparison of the Blood Levels of Medications in Obese Subjects Compared to Post-Gastric Bypass Subjects

NCT01015976
View directory record Official record
Conditions
Obesity
Interventions
bariatric surgery, control
Procedure · Other
Lead sponsor
Neuropsychiatric Research Institute, Fargo, North Dakota
Other
Eligibility
18 Years to 60 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Mar 30, 2014 · Synced Jun 10, 2026, 11:37 AM 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 28, 2009 · Synced Jun 10, 2026, 11:37 AM 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 27, 2016 · Synced Jun 10, 2026, 11:37 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Exendin-9,39 and Satiety After Bariatric Surgery

NCT02779075
View directory record Official record
Conditions
Obesity
Interventions
Saline, Exendin-9,39
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
20 Years to 70 Years
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 30, 2020 · Synced Jun 10, 2026, 11:37 AM EDT
Completed Not applicable Interventional Results available

Evaluation of Endostapled Anastomoses for Laparoscopic Gastric Bypass (EEA-LGB)

NCT00254072
View directory record Official record
Conditions
Morbid Obesity
Interventions
3.5 mm vs 4.8 mm Stapler During Laparoscopic Gastric Bypass
Procedure
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years to 60 Years
Enrollment
355 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
6
States / cities
Orange, California • Tampa, Florida • Boston, Massachusetts + 3 more
Source: ClinicalTrials.gov public record
Updated Feb 17, 2010 · Synced Jun 10, 2026, 11:37 AM EDT
Completed No phase listed Observational

Energy Expenditure and Gastric Bypass Surgery Study

NCT00671957
View directory record Official record
Conditions
Morbid Obesity
Interventions
Not listed
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 80 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2019
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jun 20, 2019 · Synced Jun 10, 2026, 11:37 AM EDT
Completed No phase listed Observational

Effect of Gastric Bypass on Patients With Type 2 Diabetes and/or Dyslipidemia

NCT00879125
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Not listed
Lead sponsor
Vanderbilt University
Other
Eligibility
17 Years to 66 Years
Enrollment
219 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2007
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 13, 2009 · Synced Jun 10, 2026, 11:37 AM EDT