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ClinicalTrials.gov public records Last synced Oct 24, 2026, 5:32 PM EDT

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Showing 121–144 of 303 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Breath Testing Clear all
Terminated Not applicable Interventional Accepts healthy volunteers

13C-Spirulina Nitrogen Content GEBT Study

NCT04635306
View directory record Official record
Conditions
Gastroparesis
Interventions
Approved GEBT test meal
Diagnostic Test
Lead sponsor
Cairn Diagnostics
Industry
Eligibility
18 Years to 85 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Brentwood, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 3, 2021 · Synced Oct 24, 2026, 5:32 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Lung Macrophage Populations and Functions in Chronic Obstructive Pulmonary Disease (COPD)-Susceptible Smokers

NCT04722835
View directory record Official record
Conditions
Copd, Smoking, Tobacco Use
Interventions
Bronchoscopy with Bronchoalveolar Lavage (BAL)
Procedure
Lead sponsor
University of California, San Francisco
Other
Eligibility
40 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2030
U.S. locations
3
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Oct 24, 2026, 5:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

An Adherence Tool to Manage Narcotic -Addicted HIV Patients

NCT02194764
View directory record Official record
Conditions
Healthy Adults
Interventions
Naltrexone and 2-butanol, 2-butanol which is encapsulated (size 3 capsule) plus 50 mg of naltrexone (HCl form)
Drug
Lead sponsor
Xhale Assurance
Industry
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jul 18, 2014 · Synced Oct 24, 2026, 5:32 PM EDT
Completed No phase listed Observational

Clinical Validation of the LumiraDx SARS-CoV-2 & Flu A/B Combo Test

NCT05787444
View directory record Official record
Conditions
SARS-CoV-2, Influenza A, Influenza B, Asymptomatic COVID-19
Interventions
LumiraDx SARS-CoV-2 & Flu A/B
Diagnostic Test
Lead sponsor
LumiraDx UK Limited
Industry
Eligibility
2 Years and older
Enrollment
1,081 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Cullman, Alabama
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Oct 24, 2026, 5:32 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

The Impact and Detection of Driving Impairments Associated With Acute Cannabis Smoking

NCT02849587
View directory record Official record
Conditions
Cannabis Intoxication
Interventions
Cannabis
Drug
Lead sponsor
University of California, San Diego
Other
Eligibility
21 Years to 55 Years
Enrollment
199 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jan 4, 2022 · Synced Oct 24, 2026, 5:32 PM EDT
Completed No phase listed Observational

Tobacco Assessment and Intervention With Low-Income Persons Living With HIV-AIDS (PLWHA) in Community-Based AIDS Service Organizations

NCT01482923
View directory record Official record
Conditions
Tobacco Cessation, HIV, AIDS
Interventions
Treatment as usual, AIR (Aspirations, Inspiration, Respiration)
Behavioral
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2019
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 4, 2019 · Synced Oct 24, 2026, 5:32 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Helicobacter Pylori Screening and Treatment in the At-risk South Florida Community- AIM 1

NCT07224035
View directory record Official record
Conditions
H Pylori Infection, H Pylori Gastritis, Gastric Cancer
Interventions
PYTEST® 14C-Urea Breath Test, VOQUEZNA® Triple Pak®
Drug
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
430 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 24, 2026, 5:32 PM EDT
Not listed No phase listed Observational

Comparative Assessment of Radioisotope Glucose and Breath Test

NCT04499742
View directory record Official record
Conditions
Small Intestinal Bacterial Overgrowth
Interventions
Using Isotope (Tc99m-Sulfur Colloid) to label glucose and administer this directly into duodenum.
Radiation
Lead sponsor
Augusta University
Other
Eligibility
18 Years to 80 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 5, 2020 · Synced Oct 24, 2026, 5:32 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Development of a Breath Analyzer for Asthma Screening

NCT00386737
View directory record Official record
Conditions
Asthma
Interventions
Not listed
Lead sponsor
Ekips Technologies
Industry
Eligibility
4 Years to 65 Years
Enrollment
2,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2007
U.S. locations
1
States / cities
Norman, Oklahoma
Source: ClinicalTrials.gov public record
Updated Oct 12, 2006 · Synced Oct 24, 2026, 5:32 PM EDT
Completed Phase 3 Interventional

Bag Mode BreathID Hp Validation Versus Endoscopy in Detection of Helicobacter Pylori

NCT02010112
View directory record Official record
Conditions
Helicobacter Pylori Infection
Interventions
Breath Test Collection bags
Other
Lead sponsor
Meridian Bioscience, Inc.
Industry
Eligibility
18 Years and older
Enrollment
193 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
9
States / cities
Baltimore, Maryland • Chevy Chase, Maryland • Detroit, Michigan + 6 more
Source: ClinicalTrials.gov public record
Updated Dec 20, 2022 · Synced Oct 24, 2026, 5:32 PM EDT
Completed No phase listed Observational

Systems Biology of Diffusion Impairment in Human Immunodeficiency Virus (HIV)

NCT03572335
View directory record Official record
Conditions
HIV Infections, Pulmonary Disease
Interventions
PFT's (pulmonary function testing)
Diagnostic Test
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 80 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 7, 2025 · Synced Oct 24, 2026, 5:32 PM EDT
Completed No phase listed Observational

Retrospective Analysis of Treatment Outcomes in Patients With Bacterial Overgrowth Syndrome Diagnosed by D-Xylose Breath Testing

NCT01324895
View directory record Official record
Conditions
Small Intestinal Bacterial Overgrowth Syndrome (SIBO), Small Bowel Bacterial Overgrowth Syndrome (SBBOS)
Interventions
Not listed
Lead sponsor
University of Florida
Other
Eligibility
Not listed
Enrollment
944 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Mar 26, 2012 · Synced Oct 24, 2026, 5:32 PM EDT
Not yet recruiting Phase 2 Interventional

Herbal Supplement (Biocidin REMOVE) for Bacterial Overgrowth in Irritable Bowel Syndrome

NCT07768267
View directory record Official record
Conditions
Irritable Bowel Syndrome (IBS), Small Intestinal Bacterial Overgrowth Syndrome (SIBO)
Interventions
Biocidin REMOVE, Placebo
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 8, 2026 · Synced Oct 24, 2026, 5:32 PM EDT
Terminated Not applicable Interventional

Yoga in Improving Quality of Life in Patients With Non-small Cell Lung Cancer Undergoing Treatment

NCT02895503
View directory record Official record
Conditions
Non-small Cell Lung Cancer, Recurrent Non-Small Cell Lung Carcinoma
Interventions
Yoga, Support Group Therapy, FACT-L, Pulmonary function test
Behavioral · Other
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
Not listed
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Sep 9, 2016 · Synced Oct 24, 2026, 5:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Establishing a Pediatric Reference Range for the 13C-Spirulina Gastric Emptying Breath Test (GEBT)

NCT06004596
View directory record Official record
Conditions
Gastroparesis
Interventions
13C-Spirulina Gastric Emptying Breath Test (GEBT), 13C-Spirulina Gastric Emptying Breath Test (GEBT) - repeat
Diagnostic Test
Lead sponsor
Cairn Diagnostics
Industry
Eligibility
7 Years to 18 Years
Enrollment
182 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
3
States / cities
Brentwood, Tennessee • Houston, Texas • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 3, 2024 · Synced Oct 24, 2026, 5:32 PM EDT
Completed Not applicable Interventional

Testing the Effectiveness of Child and Parent-Targeted Health Promotion Interventions in Pediatric Stem Cell Transplantation

NCT00760227
View directory record Official record
Conditions
Bone Marrow, Stem Cell Transplant
Interventions
Massage Therapy, Humor Therapy, Relaxation Therapy
Other
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
6 Years to 18 Years
Enrollment
189 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2003
U.S. locations
3
States / cities
Columbus, Ohio • Philadelphia, Pennsylvania • Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 29, 2011 · Synced Oct 24, 2026, 5:32 PM EDT
Withdrawn Early Phase 1 Interventional Accepts healthy volunteers

Health Literacy and Smoking Cessation in Low-SES Diverse Smokers - Project HALT II

NCT02942212
View directory record Official record
Conditions
Smoking Cessation
Interventions
Questionnaire, In-Depth Interviews, Breath Test, Nicotine Patches, Advice plus Phone Counseling, Advice plus Counseling Sessions, Self Assessment Questionnaires
Behavioral · Other · Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
25 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 1, 2019 · Synced Oct 24, 2026, 5:32 PM EDT
Completed No phase listed Observational

SIBO, Immune Activation, and FGIDs in Children

NCT02872961
View directory record Official record
Conditions
Small Intestinal Bacterial Overgrowth, Irritable Bowel Syndrome, Functional Dyspepsia, Functional Abdominal Pain
Interventions
Not listed
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
4 Years to 17 Years
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 29, 2021 · Synced Oct 24, 2026, 5:32 PM EDT
Completed Not applicable Interventional Results available

Inspiratory Muscle Training on The Severity of Exercise-Induced Bronchoconstriction and Time-Trial Performance (IMT_EIB)

NCT06336681
View directory record Official record
Conditions
Exercise Induced Bronchospasm, Exercise Induced Asthma
Interventions
PrO2Fit Device
Device
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 35 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Bloomington, Indiana
Source: ClinicalTrials.gov public record
Updated May 12, 2026 · Synced Oct 24, 2026, 5:32 PM EDT
Enrolling by invitation No phase listed Observational

Endoscopic Metabolic and Bariatric Therapies

NCT05725967
View directory record Official record
Conditions
Obesity, Obesity, Morbid, Obesity Associated Disorder, Bariatric Surgery Candidate, Fistula, Gastric, Roux-en-y Anastomosis Site, Ulcer, Gastric, Abdominal Pain, Abdominal Obesity, Complication of Surgical Procedure, Complication of Treatment, Complication,Postoperative, Weight Gain, Weight Loss, Leak, Anastomotic, Delayed Gastric Emptying Following Procedure
Interventions
Primary Obesity Endoscopic Procedures, Endoscopic Revision of Bariatric Surgical Procedures, Bariatric Surgery Procedures, Endoscopic Sleeve Gastroplasty, Trans-oral Outlet Reduction, Intragastric Balloon, Primary obesity surgery endoluminal, Restorative obesity surgery endoluminal, Argon Plasma Coagulation, Gastroplasty with Endoscopic Myotomy, Bariatric Endoscopic Antral Myotomy, Pylorus Sparing Antral Myotomy, Aspiration Therapy
Procedure · Device
Lead sponsor
Christopher C. Thompson, MD, MSc
Other
Eligibility
18 Years to 80 Years
Enrollment
5,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2029
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 2, 2025 · Synced Oct 24, 2026, 5:32 PM EDT
Completed Phase 2Phase 3 Interventional Results available

13C-Methacetin Breath Test for the Prediction of Outcome in in ALI or ALF

NCT02786836
View directory record Official record
Conditions
Acute Liver Failure
Interventions
13C-Methacetin
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
76 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
11
States / cities
Birmingham, Alabama • San Francisco, California • New Haven, Connecticut + 8 more
Source: ClinicalTrials.gov public record
Updated Dec 22, 2020 · Synced Oct 24, 2026, 5:32 PM EDT
Completed No phase listed Interventional Results available

Companion Protocol for ¹³C-Methacetin Breath Tests in BMS: NCT03486899, NCT03486912 Referenced Trials

NCT03611101
View directory record Official record
Conditions
NASH - Nonalcoholic Steatohepatitis
Interventions
¹³C-Methacetin Breath Test, BMS-986036, BreathID MCS device
Combination Product · Drug · Device
Lead sponsor
Meridian Bioscience, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
124 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Humble, Texas
Source: ClinicalTrials.gov public record
Updated Dec 20, 2022 · Synced Oct 24, 2026, 5:32 PM EDT
Active, not recruiting Not applicable Interventional

Stress Management Program

NCT06526585
View directory record Official record
Conditions
Stress, Anxiety
Interventions
Cyclic Sighing Breathing, Box Breathing, Hypnosis, Audiobook
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Sep 30, 2026 · Synced Oct 24, 2026, 5:32 PM EDT
Terminated Phase 2 Interventional Results available

Comparison of Two Macrolides, Azithromycin and Erythromycin, for Symptomatic Treatment of Gastroparesis

NCT01323582
View directory record Official record
Conditions
Gastroparesis
Interventions
Erythromycin, Azithromycin
Drug
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 65 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Dec 5, 2014 · Synced Oct 24, 2026, 5:32 PM EDT