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ClinicalTrials.gov public records Last synced Oct 1, 2026, 4:41 PM EDT

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Showing 25–48 of 55 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Laparoscopic Gastric Bypass Clear all
Completed No phase listed Observational Accepts healthy volunteers Results available

Minimally Invasive Surgery (MIS) Database for the Purpose of Research

NCT00535990
View directory record Official record
Conditions
Morbid Obesity, Hernia, Colorectal Cancer, Laparoscopy
Interventions
Not listed
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Dec 6, 2021 · Synced Oct 1, 2026, 4:41 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 Oct 1, 2026, 4:41 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 1, 2026, 4:41 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 Oct 1, 2026, 4:41 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Fat Taste Sensory Study

NCT03540693
View directory record Official record
Conditions
Bariatric Surgery Candidate, Bariatric Surgical Procedure
Interventions
RYGB, SG, LAGB
Procedure
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
18 Years to 64 Years
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2023
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 28, 2021 · Synced Oct 1, 2026, 4:41 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nutritional Effect of an Amino Acid Mixture on Lean Body Mass (LBM) in Post-bariatric Surgery Patients

NCT00473356
View directory record Official record
Conditions
Obesity, Post-gastric Bypass
Interventions
receive amino acid supplement
Dietary Supplement
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Nov 19, 2013 · Synced Oct 1, 2026, 4:41 PM EDT
Terminated Not applicable Interventional

Effects of a Novel Dietary Intervention on Body Composition After Laparoscopic Gastric Bypass Surgery

NCT01041261
View directory record Official record
Conditions
Obesity, Morbid Obesity
Interventions
BariatrX Essentials 360 Treatment
Dietary Supplement
Lead sponsor
MetaProteomics LLC
Industry
Eligibility
25 Years and older · Female only
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 13, 2012 · Synced Oct 1, 2026, 4:41 PM EDT
Completed Phase 4 Interventional Results available

Efficacy of Exparel (TM) on Post-operative Pain After Laparoscopic Gastric Bypass Using Circular EEA Stapler

NCT03187379
View directory record Official record
Conditions
Post-operative Pain Management
Interventions
Exparel, Bupivacaine
Drug
Lead sponsor
Matthew Kroh
Other
Eligibility
18 Years and older
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 21, 2022 · Synced Oct 1, 2026, 4:41 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 Oct 1, 2026, 4:41 PM 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 Oct 1, 2026, 4:41 PM EDT
Completed Not applicable Interventional Results available

The Effect of Pre-Operative Transversus Abdominis Plane (TAP) Block in the Post Operative Opioid Consumption in Morbid Obese Patients Undergoing Laparoscopic Gastric Bypass Surgery: A Prospective,Randomized, Blinded Study

NCT01075087
View directory record Official record
Conditions
Pain, Obesity, Surgery
Interventions
Placebo, (study group) will receive a bilateral TAP block using 20 cc of 0.5% ropivacaine on each side.
Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 65 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 26, 2014 · Synced Oct 1, 2026, 4:41 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Transoral Endoscopic Liver Biopsy During Laparoscopic Gastric Bypass

NCT00512512
View directory record Official record
Conditions
Steatohepatitis, Morbid Obesity
Interventions
Transoral Endoscopic Liver Biopsy
Procedure
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2010 · Synced Oct 1, 2026, 4:41 PM EDT
Not listed Not applicable Interventional

Efficacy of IV Acetaminophen in Acute Post-Operative Pain Control in Laparoscopic Roux-en-Y Gastric Bypass Surgery (LRYGBP) Patients

NCT01460667
View directory record Official record
Conditions
Morbid Obesity
Interventions
IV acetaminophen, IV normal saline
Drug
Lead sponsor
McLaren Regional Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2011
U.S. locations
1
States / cities
Flint, Michigan
Source: ClinicalTrials.gov public record
Updated Oct 27, 2011 · Synced Oct 1, 2026, 4:41 PM EDT
Completed Not applicable Interventional Results available

Laparoscopic Gastric Bypass vs LAP-BAND for Treatment of Morbid Obesity

NCT00247377
View directory record Official record
Conditions
Morbid Obesity
Interventions
Gastric bypass surgery, Lap-Band
Procedure
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years to 60 Years
Enrollment
197 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2009
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated Apr 24, 2023 · Synced Oct 1, 2026, 4:41 PM 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 4, 2023 · Synced Oct 1, 2026, 4:41 PM EDT
Completed Phase 1 Interventional

Glucose Metabolism in the Immediate and Short Term Follow up After Bariatric Surgery

NCT00488423
View directory record Official record
Conditions
Diabetes, Gastric Bypass
Interventions
Mixed Meal Tolerance test, Hyperglycemic clamp
Procedure
Lead sponsor
The Cleveland Clinic
Other
Eligibility
19 Years to 65 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 22, 2011 · Synced Oct 1, 2026, 4:41 PM 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 Oct 1, 2026, 4:41 PM 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 Oct 1, 2026, 4:41 PM EDT
Terminated Not applicable Interventional

Diagnostic Endoscopic Exploration for Pancreatic Head Mass

NCT00816179
View directory record Official record
Conditions
Pancreatic Head Mass
Interventions
Transgastric diagnostic endoscopic peritoneoscopy
Procedure
Lead sponsor
Jeffrey Hazey
Other
Eligibility
18 Years to 80 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 3, 2014 · Synced Oct 1, 2026, 4:41 PM EDT
Completed No phase listed Observational

Bone Loss After Laparoscopic Roux-en-Y Gastric Bypass

NCT00975013
View directory record Official record
Conditions
Bone Loss, Bone Density, Gastric Bypass, Bariatric Surgery
Interventions
Not listed
Lead sponsor
Gundersen Lutheran Medical Foundation
Other
Eligibility
30 Years to 65 Years · Female only
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
La Crosse, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 7, 2015 · Synced Oct 1, 2026, 4:41 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 Oct 1, 2026, 4:41 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 1, 2026, 4:41 PM EDT
Completed No phase listed Observational

Gastric Bypass After Previous Anti-reflux Surgery

NCT01041105
View directory record Official record
Conditions
Clinically Severe Obesity, Gastroesophageal Reflux Disease
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 60 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Jan 1, 2010 · Synced Oct 1, 2026, 4:41 PM EDT
Completed Not applicable Interventional Results available

Evaluation of the Rapid Airway Management Positioner

NCT00581230
View directory record Official record
Conditions
Endotracheal Intubation, Rapid Airway Management Positioner
Interventions
Laryngoscopy with RAMP, Laryngoscopy without RAMP
Device
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 80 Years
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 20, 2016 · Synced Oct 1, 2026, 4:41 PM EDT