Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results come from ClinicalTrials.gov. When the live registry is unavailable, a clearly labeled stored copy may be shown.

Clear filters

These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.

ClinicalTrials.gov public records Last synced Oct 24, 2026, 10:30 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 25–48 of 303 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Breath Testing Clear all
Completed No phase listed Observational

H. Pylori Testing for Patients With Non-specific Upper Abdominal Pain in the Emergency Department

NCT01376414
View directory record Official record
Conditions
Gastritis, Peptic Ulcer, Peptic Ulcer Perforation, Stomach Ulcer
Interventions
Urea Breath Test (UBT) for H. pylori infection
Other
Lead sponsor
George Washington University
Other
Eligibility
18 Years and older
Enrollment
212 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
2
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Aug 26, 2016 · Synced Oct 24, 2026, 10:30 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Impact of E-cigarette Use on the Body

NCT04972513
View directory record Official record
Conditions
Cigarette Smoking-Related Carcinoma
Interventions
Biospecimen Collection, Nitric Oxide Breath Test, Oscillometry, Spirometry, Survey Administration, Endothelial function
Procedure · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
15 Years to 25 Years
Enrollment
182 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 23, 2026 · Synced Oct 24, 2026, 10:30 AM EDT
Completed Not applicable Interventional Results available

Assessing Portal Hypertension With Methacetin Breath Test

NCT02143778
View directory record Official record
Conditions
Patients With Compensated Liver Cirrhosis
Interventions
Methacetin Breath Test
Device
Lead sponsor
Meridian Bioscience, Inc.
Industry
Eligibility
18 Years and older
Enrollment
246 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
3
States / cities
New Haven, Connecticut • Durham, North Carolina • Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Dec 20, 2022 · Synced Oct 24, 2026, 10:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Double Crossover Casein Type Tolerance Trial

NCT06315517
View directory record Official record
Conditions
Dairy Intolerance, Healthy Adults
Interventions
Conventional lactose-free cow's milk, Nonconventional (A2) cow's milk, Nonconventional (A2) lactose-free cow's milk
Other
Lead sponsor
Auburn University
Other
Eligibility
18 Years to 85 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Auburn, Alabama
Source: ClinicalTrials.gov public record
Updated Apr 4, 2025 · Synced Oct 24, 2026, 10:30 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Breath Biomarkers for Sleep Loss and Circadian Timing

NCT03980340
View directory record Official record
Conditions
Shift-Work Sleep Disorder, Shift Work Type Circadian Rhythm Sleep Disorder, Sleep Disorders, Circadian Rhythm, Sleep Disorders, Intrinsic, Advanced Sleep Phase Syndrome (ASPS), Advanced Sleep Phase Syndrome, Advanced Sleep Phase, Delayed Sleep Phase, Delayed Sleep Phase Syndrome, Non-24 Hour Sleep-Wake Disorder, Irregular Sleep-Wake Syndrome
Interventions
Short Nap Intervention, No Nap Intervention
Behavioral
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 50 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 3, 2025 · Synced Oct 24, 2026, 10:30 AM EDT
Completed Phase 4 Interventional

Hydrogen Breath Test an Instrument to Predict Rifaximin-Response in Irritable Bowel Syndrome Predominant Diarrhea

NCT03729271
View directory record Official record
Conditions
Irritable Bowel Syndrome, Irritable Bowel Syndrome With Diarrhea
Interventions
Rifaximin, Glucose and lactulose hydrogen breath testing
Drug · Device
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 80 Years
Enrollment
148 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 12, 2026 · Synced Oct 24, 2026, 10:30 AM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Can You Breathe Your Way To Better Health?

NCT06829836
View directory record Official record
Conditions
Cancer, Chronic Stress, Autonomic Dysfunction
Interventions
Hight intensity interval training, Cyclic Hyperventilation with Retention
Behavioral
Lead sponsor
University of Northern Colorado
Other
Eligibility
18 Years to 50 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Greeley, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 25, 2025 · Synced Oct 24, 2026, 10:30 AM EDT
Completed Phase 3 Interventional Results available

Weight Loss in Parkinson's Disease and Role of Small Bowel Bacterial Overgrowth

NCT01662791
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Rifaximin
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 4, 2016 · Synced Oct 24, 2026, 10:30 AM EDT
Completed Not applicable Interventional Results available

Development and Feasibility of Mindfulness Based Pain Reduction

NCT04980612
View directory record Official record
Conditions
Chronic Low-back Pain
Interventions
Mindfulness Based Pain Reduction, Mindfulness Based Stress Reduction
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Oct 24, 2026, 10:30 AM EDT
Completed Not applicable Interventional

Feasibility and Preliminary Efficacy of Hatha Yoga in Head and Neck Cancer Survivors

NCT01951664
View directory record Official record
Conditions
Head Neck Cancer
Interventions
Baseline Study Measures, Yoga Evaluation, Yoga Program, Yoga Practice Plan, Study Assessments
Other · Behavioral
Lead sponsor
Vanderbilt-Ingram Cancer Center
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
2
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 27, 2016 · Synced Oct 24, 2026, 10:30 AM EDT
Active, not recruiting No phase listed Observational

Characterizing Sleep Among Long-term Survivors of Childhood Cancer

NCT05480904
View directory record Official record
Conditions
ALL, Adult, CNS Tumor, Solid Tumor
Interventions
Neurocognitive (Thinking) Testing, CNS Vital Signs (Thinking) Testing, Health Questionnaires, Sleep Surveys & Sleep Diary, Echocardiography/EKG, Pulmonary Function, Remote Polysomnography, Physical Function
Other · Diagnostic Test · Device
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
18 Years and older
Enrollment
199 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Oct 24, 2026, 10:30 AM EDT
Active, not recruiting No phase listed Observational

Validation of a Molecular Test for Risk-stratification of Patients With High-risk Intestinal Metaplasia (GCEP2 Study)

NCT05782465
View directory record Official record
Conditions
Stomach Neoplasm
Interventions
Blood Collection, processing and analyses, Gastroscopy and biopsies collection, Urea Breath Test
Procedure · Diagnostic Test
Lead sponsor
National University Hospital, Singapore
Other
Eligibility
50 Years to 75 Years
Enrollment
500 participants
Timeline
2019 – 2033
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Aug 7, 2026 · Synced Oct 24, 2026, 10:30 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Microneurography and Spinal Cord Stimulation in Chronic Visceral Pain

NCT00678717
View directory record Official record
Conditions
Chronic Pain
Interventions
Autonomic Evaluation
Procedure
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 16, 2018 · Synced Oct 24, 2026, 10:30 AM EDT
Terminated Early Phase 1 Interventional

19F MRI of Ventilation in Subjects With Cystic Fibrosis Undergoing Treatment for Pulmonary Exacerbation

NCT03497117
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Lung Clearance Index, MRI with PFP
Device · Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 99 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 9, 2020 · Synced Oct 24, 2026, 10:30 AM EDT
Completed No phase listed Interventional Results available

Urease Breath Test for Rapid Characterization of Pneumonia

NCT03100760
View directory record Official record
Conditions
Pneumonia, Bacterial
Interventions
13C-urea breath test
Device
Lead sponsor
University of New Mexico
Other
Eligibility
18 Years to 85 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 14, 2025 · Synced Oct 24, 2026, 10:30 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Sucrose Breath Test to Determine Intestinal Permeability in IBS

NCT01674088
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Not listed
Lead sponsor
Metabolic Solutions Inc.
Industry
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 10, 2014 · Synced Oct 24, 2026, 10:30 AM EDT
Terminated Phase 3 Interventional Results available

A Phase 3 Adaptive Study to Evaluate the Safety and Efficacy of Inhaled Treprostinil in Participants With Pulmonary Hypertension (PH) Due to Chronic Obstructive Pulmonary Disease (COPD)

NCT03496623
View directory record Official record
Conditions
Pulmonary Hypertension, Chronic Obstructive Pulmonary Disease
Interventions
Inhaled treprostinil solution, Placebo solution
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
188 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
65
States / cities
Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 53 more
Source: ClinicalTrials.gov public record
Updated Nov 24, 2023 · Synced Oct 24, 2026, 10:30 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Longitudinal At Home Smell Testing to Detect Infection by SARS-CoV-2

NCT05040659
View directory record Official record
Conditions
Anosmia, Asymptomatic COVID-19, COVID-19 Respiratory Infection, Influenza, Healthy, PASC Post Acute Sequelae of COVID 19
Interventions
AROMHA Longitudinal Smell Test
Device
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 100 Years
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 6, 2026 · Synced Oct 24, 2026, 10:30 AM EDT
Terminated Phase 2 Interventional Results available

Prediction of Severity of Liver Disease by a 13C Octanoate Breath Test (OBT)

NCT01244503
View directory record Official record
Conditions
Metabolic Syndrome, Nonalcoholic Fatty Liver Disease
Interventions
Sodium Octanoate Breath Test
Drug
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
2
States / cities
Houston, Texas • Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 28, 2015 · Synced Oct 24, 2026, 10:30 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Passive Detection- SARS-CoV-2 (COVID-19) A&M Breathalyzer (PROTECT Kiosk) for Operational Medicine

NCT06402318
View directory record Official record
Conditions
COVID-19, SARS CoV 2 Virus, COVID-19 Pneumonia, COVID-19 Respiratory Infection, COVID-19 Acute Respiratory Distress Syndrome
Interventions
A&M Breathalyzer PROTECT Kiosk
Device
Lead sponsor
The Geneva Foundation
Other
Eligibility
18 Years to 89 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Fort Sam Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 10, 2025 · Synced Oct 24, 2026, 10:30 AM EDT
Completed Not applicable Interventional

Breath Training Exercise for the Reduction of Chronic Dyspnea

NCT01831388
View directory record Official record
Conditions
Chronic Pulmonary Disorder
Interventions
breathing techniques, Self-Administered Baseline and Transition Dyspnea Indexes
Other · Behavioral
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
19 Years and older
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 17, 2018 · Synced Oct 24, 2026, 10:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Studies to Determine Whether Oxygen Sensing is Impaired in Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Infected Patients

NCT04954157
View directory record Official record
Conditions
Hypoxia, SARS-CoV-2 Acute Respiratory Disease, Carotid Bodies
Interventions
Phase-1: Breath Holding Test, Phase 2: 6-Minute Walk Test (6MWT)
Diagnostic Test
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 16, 2022 · Synced Oct 24, 2026, 10:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

GEBT Telehealth Administration Usability Study

NCT04684992
View directory record Official record
Conditions
Gastroparesis
Interventions
GEBT Telehealth Administration Usability
Device
Lead sponsor
Cairn Diagnostics
Industry
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Brentwood, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 24, 2021 · Synced Oct 24, 2026, 10:30 AM EDT
Completed No phase listed Observational

Assert-IQ Implantable Cardiac Monitor (ICM) Post Market Study

NCT06172699
View directory record Official record
Conditions
Atrial Fibrillation Paroxysmal, Atrial Fibrillation, Persistent, Cardiac Arrhythmia, Ablation
Interventions
Holter monitoring in patients who have been successfully implanted with an Abbott Assert-IQ ICM device
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years to 100 Years
Enrollment
151 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
11
States / cities
San Diego, California • Orlando, Florida • Overland Park, Kansas + 8 more
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Oct 24, 2026, 10:30 AM EDT