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Showing 1–24 of 87 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Bariatric Surgery Candidate Clear all
Completed No phase listed Observational

A Complex Contraception Registry

NCT02219269
View directory record Official record
Conditions
Diabetes, Cardiovascular Disease, Epilepsy, Migraine, Neurological Disorders, Cancer, Bariatric Surgery Candidate, Organ or Tissue Transplant; Complications, Lupus Erythematosus, Systemic, Other Hematologic Conditions, Other Venous Embolism and Thrombosis
Interventions
Not listed
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
97 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
5
States / cities
Los Angeles, California • Orange, California • Sacramento, California + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 13, 2018 · Synced Sep 7, 2026, 10:25 PM EDT
Terminated Early Phase 1 Interventional Accepts healthy volunteers

Surgical Weight Loss and Alcohol Perception

NCT04299373
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
Alcohol: Oral administration, Alcohol: Intravenous administration
Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
30 Years to 55 Years · Female only
Enrollment
3 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 1, 2024 · Synced Sep 7, 2026, 10:25 PM EDT
Completed No phase listed Observational

The Collateral Impact of Bariatric Surgery on Families

NCT02021630
View directory record Official record
Conditions
Obesity, Bariatric Surgery Candidate, Weight Loss
Interventions
Outcomes
Other
Lead sponsor
Geisinger Clinic
Other
Eligibility
18 Years and older
Enrollment
97 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 20, 2016 · Synced Sep 7, 2026, 10:25 PM EDT
Completed Phase 2Phase 3 Interventional

Efficacy of a Novel Multivitamin-Mineral Supplement in Preventing Vitamin Deficiency in Postoperative Bariatric Patients

NCT01475617
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
AquaVanta Chewable Tablet, Flinstones Complete, Nature Made Calcium Softgels, Twin Labs Iron Caps, Rexall Vitamin B12 Tablet
Dietary Supplement
Lead sponsor
Yasoo Health
Industry
Eligibility
18 Years to 65 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 21, 2015 · Synced Sep 7, 2026, 10:25 PM EDT
Not listed No phase listed Observational

ViSiGi LUX Bariatric Sizing and Calibration System

NCT06282094
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
Not listed
Lead sponsor
Boehringer Labs LLC
Industry
Eligibility
18 Years to 99 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
York, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 12, 2024 · Synced Sep 7, 2026, 10:25 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Contributing Factors in the Pathobiology of Airway Remodeling in Obesity

NCT03115632
View directory record Official record
Conditions
Asthma, Obesity, Obesity, Morbid, Bariatric Surgery Candidate
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
18 Years to 60 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2023
U.S. locations
2
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 21, 2023 · Synced Sep 7, 2026, 10:25 PM EDT
Not listed Phase 4 Interventional

ZYNRELEF® for Postoperative Analgesia After Laparoscopic Sleeve Gastrectomy

NCT05863221
View directory record Official record
Conditions
Post Operative Pain, Acute, Bariatric Surgery Candidate, Postoperative Pain
Interventions
ZYNRELEF 200Mg-6Mg Extended-Release Solution
Drug
Lead sponsor
Dr. Yannis Raftopoulos
Other
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Holyoke, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 17, 2023 · Synced Sep 7, 2026, 10:25 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Validity of Physical Activity Questionnaires in Persons Pursuing Bariatric Surgery

NCT03981978
View directory record Official record
Conditions
Bariatric Surgery Candidate, Obesity
Interventions
Physical Activity
Behavioral
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
2
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 28, 2023 · Synced Sep 7, 2026, 10:25 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Lifestyle Improvement for Teens With Bariatric Surgery

NCT05393570
View directory record Official record
Conditions
Obesity, Adolescent, Bariatric Surgery Candidate
Interventions
Healthy Lifestyle Behavioral Intervention (MBS -supported intervention)
Behavioral
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
12 Years to 18 Years
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 2, 2025 · Synced Sep 7, 2026, 10:25 PM EDT
Recruiting Not applicable Interventional

Autonomic Neural Blockade in Bariatric Surgery

NCT07104825
View directory record Official record
Conditions
Bariatric Surgery Candidate, Pain, Postoperative, Nausea and Vomiting, Postoperative, Opioid Use
Interventions
Intraoperative autonomic neural blockade (ANB), Laparoscopic Standard of Care Abdominal Wall Block
Procedure
Lead sponsor
Endeavor Health
Other
Eligibility
18 Years to 90 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Evanston, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 28, 2026 · Synced Sep 7, 2026, 10:25 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Protein Supplementation Post Bariatric Surgery

NCT02951663
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
Protein
Dietary Supplement
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 70 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 19, 2019 · Synced Sep 7, 2026, 10:25 PM EDT
Completed Phase 1 Interventional

Antibiotics, Gastric Bypass, and the Microbiome

NCT05367479
View directory record Official record
Conditions
Obesity, Morbid, Hypertension, Bariatric Surgery Candidate
Interventions
Antibiotic
Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years to 70 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 9, 2022 · Synced Sep 7, 2026, 10:25 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Symbiotic Use in Post-Bariatric Surgery Patients

NCT06252558
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
Symbiotic, Placebo
Dietary Supplement
Lead sponsor
University of North Florida
Other
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 8, 2024 · Synced Sep 7, 2026, 10:25 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Assisted Robotic vs Laparoscopic Sleeve Gastrectomy

NCT06425016
View directory record Official record
Conditions
Post Operative Pain, Laparoscopic Sleeve Gastrectomy, Robotic Sleeve Gastrectomy, Obesity, Bariatric Surgery Candidate, Quality of Life
Interventions
Laparoscopic Sleeve Gastrectomy (LSG), Robotic Sleeve Gastrectomy (RSG)
Procedure
Lead sponsor
Ricard Corcelles
Other
Eligibility
18 Years to 70 Years
Enrollment
91 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 9, 2025 · Synced Sep 7, 2026, 10:25 PM EDT
Active, not recruiting Phase 4 Interventional

Surgical or Medical Treatment

NCT04128995
View directory record Official record
Conditions
Diabetes Mellitus, Type 2, Pediatric Obesity, Bariatric Surgery Candidate
Interventions
Advanced Medical Therapy and Bariatric Surgery, Advanced Medical Therapy, Bariatric Surgery
Procedure · Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
13 Years to 19 Years
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
3
States / cities
Aurora, Colorado • Chicago, Illinois • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 23, 2026 · Synced Sep 7, 2026, 10:25 PM EDT
Not yet recruiting Not applicable Interventional

Xpan Non-Inferiority Study

NCT07385690
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
Xpan Trocar System, Standard of Care (Non-expanding Trocar)
Device
Lead sponsor
West Virginia University
Other
Eligibility
18 Years to 89 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Feb 3, 2026 · Synced Sep 7, 2026, 10:25 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 Sep 7, 2026, 10:25 PM EDT
Enrolling by invitation No phase listed Observational

Physiologic and Functional Adaptations of Insulin Sensitive Tissues

NCT03407833
View directory record Official record
Conditions
Diabetes, Insulin Resistance, Obesity, Bariatric Surgery Candidate, Roux-en-y Gastric Bypass, Liver Diseases
Interventions
Endoscopy biopsy, Surgical biopsy, Mixed-meal tolerance test, Excised Liver Tissue Sampling
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2028
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 17, 2025 · Synced Sep 7, 2026, 10:25 PM EDT
Completed No phase listed Observational

Comparative Analysis of da Vinci-Assisted and Laparoscopic Duodenal Switch Bariatric Surgical Procedures

NCT05575947
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
da Vinci Surgical System, laparoscopic bariatric surgery
Device · Procedure
Lead sponsor
Intuitive Surgical
Industry
Eligibility
18 Years and older
Enrollment
1,878 participants
Timeline
2022
U.S. locations
1
States / cities
Sunnyvale, California
Source: ClinicalTrials.gov public record
Updated Sep 28, 2023 · Synced Sep 7, 2026, 10:25 PM EDT
Terminated No phase listed Observational

The Effect of Bariatric Surgery on Spermatogenesis

NCT03725696
View directory record Official record
Conditions
Bariatric Surgery Candidate, Sexual Function and Fertility Disorders
Interventions
Semen Analysis, Hormonal panel, RYGB Gastric Bypass, IIEF Survey
Diagnostic Test · Procedure
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 55 Years · Male only
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 8, 2021 · Synced Sep 7, 2026, 10:25 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Adipose Tissue Inflammation in Individuals Undergoing Bariatric Surgery

NCT03419273
View directory record Official record
Conditions
Obesity, Morbid, Bariatric Surgery Candidate
Interventions
bariatric surgery
Procedure
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
21 Years to 65 Years
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 2, 2019 · Synced Sep 7, 2026, 10:25 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Blood Collection Biorepository for Liver Disease Research

NCT03025074
View directory record Official record
Conditions
Non-Alcoholic Steatohepatitis(NASH), Hepatitis C, Hepatitis B, Fibrosis, Cirrhosis, Fatty Liver, Obesity, Childhood, Bariatric Surgery Candidate
Interventions
Not listed
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
7 Years and older
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2099
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Aug 26, 2025 · Synced Sep 7, 2026, 10:25 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 12, 2025 · Synced Sep 7, 2026, 10:25 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 Sep 7, 2026, 10:25 PM EDT