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Showing 1–24 of 133 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Bariatric Surgery Patients Clear all
Completed No phase listed Observational Accepts healthy volunteers

The Effects of Bariatric Surgery Weight Loss on Knee Pain in Patients With Osteoarthritis of the Knee

NCT00752765
View directory record Official record
Conditions
Knee Pain, Knee Osteoarthritis
Interventions
Not listed
Lead sponsor
Penn State University
Other
Eligibility
18 Years to 70 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 2, 2015 · Synced Jun 25, 2026, 10:07 PM EDT
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 13, 2024 · Synced Jun 25, 2026, 10:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Efficacy of Vitamin D Supplementation in Bariatric Surgery Patients

NCT01385098
View directory record Official record
Conditions
Obesity, Vitamin D Deficiency
Interventions
Vitamin D3 and Calcium
Dietary Supplement
Lead sponsor
Vadim Sherman, MD
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2015
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 22, 2018 · Synced Jun 25, 2026, 10:07 PM EDT
Completed Phase 4 Interventional Results available

Bupivacaine Liposomal Injection (Exparel) for Postsurgical Analgesia in Patient Undergoing Laparoscopic Bariatric Surgery

NCT02969187
View directory record Official record
Conditions
Pain, Postoperative
Interventions
Exparel, Bupivacain, Saline
Drug
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 2, 2020 · Synced Jun 25, 2026, 10:07 PM 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 17, 2020 · Synced Jun 25, 2026, 10:07 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Reducing Sedentary Time in Obese Adults (Study 2)

NCT02160834
View directory record Official record
Conditions
Obesity
Interventions
B-MOBILE Smartphone-Based Intervention (3-min break), B-MOBILE Smartphone-Based Intervention (6-min break)
Behavioral
Lead sponsor
The Miriam Hospital
Other
Eligibility
21 Years to 70 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Mar 23, 2015 · Synced Jun 25, 2026, 10:07 PM EDT
Completed Phase 1 Interventional

Liposomal Bupivacaine for Post-operative Pain Control in Adolescent Bariatric Patients

NCT06077214
View directory record Official record
Conditions
Bariatric Surgery Candidate, Post-operative Pain
Interventions
Treatment with liposomal bupivacaine, Treatment with standard bupivacaine
Drug
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
13 Years to 18 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 6, 2025 · Synced Jun 25, 2026, 10:07 PM EDT
Terminated Not applicable Interventional

Total Joint Arthroplasty (TJA) Weight Loss Study

NCT05156762
View directory record Official record
Conditions
Osteoarthritis, Hip, Osteoarthritis, Knee, Obesity, Morbid
Interventions
Bariatric surgery, Medical weight loss, Patient research surveys, Total joint arthroplasty (TJA), Usual standard of care
Procedure · Behavioral · Other
Lead sponsor
Boston Medical Center
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 13, 2025 · Synced Jun 25, 2026, 10:07 PM EDT
Withdrawn Not applicable Interventional

Mindfulness Meditation and Bariatric Surgery

NCT04167852
View directory record Official record
Conditions
Opioid Use, Bariatric Surgery Candidate, Pain, Postoperative
Interventions
Daily text message, Mindfulness intervention
Behavioral
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 22, 2021 · Synced Jun 25, 2026, 10:07 PM EDT
Recruiting Phase 1 Interventional

Development of a MHBC Intervention for Weight Loss and Smoking Cessation for Pre-Bariatric Surgery Patients

NCT07224087
View directory record Official record
Conditions
Obesity, Smoking Cessation, Bariatric Surgery Patients
Interventions
Naltrexone Hydrochloride, Bupropion HCl Extended Release, Cognitive-Behavioral Therapy
Drug · Behavioral
Lead sponsor
Yale University
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Jun 25, 2026, 10:07 PM EDT
Completed Phase 2 Interventional Results available

Efficacy, Tolerability and Pharmacokinetics of Subcutaneous Exendin (9-39) in Patients With Post Bariatric Hypoglycemia

NCT02771574
View directory record Official record
Conditions
Post Bariatric Hypoglycemia
Interventions
Lyo avexitide, Liq avexitide
Drug
Lead sponsor
Tracey McLaughlin
Other
Eligibility
18 Years to 70 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Nov 12, 2020 · Synced Jun 25, 2026, 10:07 PM EDT
Completed Phase 1 Interventional

Effect of a Monthly High Dose of Vitamin D3 on Bariatric Surgery Patients

NCT02477956
View directory record Official record
Conditions
Morbid Obesity, Vitamin D Deficiency
Interventions
vitamin D3 (Replesta), vitamin D
Dietary Supplement
Lead sponsor
Texas Tech University
Other
Eligibility
18 Years to 60 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Jun 22, 2015 · Synced Jun 25, 2026, 10:07 PM EDT
Enrolling by invitation Not applicable Interventional

Preoperative Use of a Magnetically Controlled Capsule Endoscopy in Patients Undergoing Bariatric Surgery

NCT07587437
View directory record Official record
Conditions
Obesity, Bariatric Surgery Candidate, Hypertension, Diabetes
Interventions
Magnetically Controlled Capsule Endoscopy (MCCE)
Device
Lead sponsor
Jerry Dang
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Jun 25, 2026, 10:07 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 27, 2009 · Synced Jun 25, 2026, 10:07 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 13, 2022 · Synced Jun 25, 2026, 10:07 PM EDT
Completed No phase listed Observational

Small Bowel Length and Bariatric Surgery Outcomes

NCT02872493
View directory record Official record
Conditions
Malnutrition, Obesity, Weight Loss, Micronutrient Deficiency
Interventions
Small bowel length measurement
Procedure
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
470 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2025
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 7, 2025 · Synced Jun 25, 2026, 10:07 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Outcomes After Weight Loss Surgery in Low-Risk Patients

NCT05699083
View directory record Official record
Conditions
Weight Loss, Bariatric Surgery
Interventions
Body Image/Self-Esteem Questionnaires
Other
Lead sponsor
Dr. Feiz & Associates
Other
Eligibility
Not listed
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Beverly Hills, California
Source: ClinicalTrials.gov public record
Updated Jan 25, 2023 · Synced Jun 25, 2026, 10:07 PM EDT
Completed No phase listed Observational

Assessment of Insulin Resistance, NAFLD, Predictors of CV Morbidity, and Subcutaneous Adipose and Visceral Adipose Gene Expression in Patients Undergoing Gastric Bypass Surgery

NCT01007955
View directory record Official record
Conditions
Morbid Obesity, Insulin Resistance, Non-Alcoholic Fatty Liver Disease
Interventions
Not listed
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years to 65 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2012
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 23, 2012 · Synced Jun 25, 2026, 10:07 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 10, 2026 · Synced Jun 25, 2026, 10:07 PM EDT
Terminated Not applicable Interventional

Sleeve Gastrectomy Versus Medical Management for Remission of Diabetes in Mild to Moderately Obese Patients

NCT00965302
View directory record Official record
Conditions
Diabetes Mellitus, Type 2, Obesity
Interventions
Laparoscopic sleeve gastrectomy, Intensive medical management
Procedure · Behavioral
Lead sponsor
59th Medical Wing
Federal
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Apr 24, 2023 · Synced Jun 25, 2026, 10:07 PM EDT
Completed Not applicable Interventional

Evaluation of Apnea Tolerance in Bariatric Patients Following Rapid-sequence Induction of Anesthesia

NCT03056807
View directory record Official record
Conditions
General Surgery
Interventions
25° head-up position, 55° head-up position
Other
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Feb 16, 2017 · Synced Jun 25, 2026, 10:07 PM EDT
Recruiting Phase 3 Interventional

Trial of IV vs Oral Iron Treatment of Iron Deficiency Anemia in the Post-Operative Bariatric Surgical Patient

NCT04268849
View directory record Official record
Conditions
Iron Deficiency Anemia
Interventions
Ferumoxytol, Saline, Ferrous sulfate tablets, Vitamin C
Drug
Lead sponsor
Auerbach Hematology Oncology Associates P C
Other
Eligibility
18 Years and older
Enrollment
104 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 2, 2025 · Synced Jun 25, 2026, 10:07 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 18, 2013 · Synced Jun 25, 2026, 10:07 PM EDT
Completed Phase 4 Interventional Results available

Optimizing Post-operative Recovery in Bariatric Patients With Obstructive Sleep Apnea Undergoing Outpatient Surgery: A Comparison of Sugammadex and Neostigmine

NCT04570150
View directory record Official record
Conditions
Anesthesia
Interventions
Sugammadex, Neostigmine
Drug
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 80 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Apr 14, 2024 · Synced Jun 25, 2026, 10:07 PM EDT