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ClinicalTrials.gov public records Last synced Oct 24, 2026, 1:36 PM EDT

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Showing 73–96 of 303 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Breath Testing Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Evaluation of Serum-Derived Bovine Immunoglobulin Protein Isolate in Subjects With Decompensated Cirrhosis With Ascites

NCT02608658
View directory record Official record
Conditions
Cirrhosis of the Liver, Ascites, Spontaneous Bacterial Peritonitis
Interventions
Medical food, EnteraGam (Serum-Derived Bovine Immunoglobulin)
Other
Lead sponsor
St. Louis University
Other
Eligibility
18 Years to 70 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 1, 2018 · Synced Oct 24, 2026, 1:36 PM EDT
Completed Not applicable Interventional

4DX for the Diagnosis of Constrictive Bronchiolitis

NCT04489758
View directory record Official record
Conditions
Constrictive Bronchiolitis
Interventions
X-ray velocimetry analyzed by 4Dx XV Ventilation Analysis
Diagnostic Test
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 30, 2022 · Synced Oct 24, 2026, 1:36 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Feasibility of a Mind-Body Intervention for Optimism

NCT07862478
View directory record Official record
Conditions
Emotional Well-being, Psychological Stress, Cardiovascular Risk
Interventions
Emotional Well-Being Writing, Chair-Assisted Squats, Slow-Paced Breathing
Behavioral
Lead sponsor
Penn State University
Other
Eligibility
40 Years to 65 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 7, 2026 · Synced Oct 24, 2026, 1:36 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

GEBT Lot-to-Lot and Biological Variability

NCT04772261
View directory record Official record
Conditions
Gastroparesis
Interventions
13C-Spirulina GEBT
Diagnostic Test
Lead sponsor
Cairn Diagnostics
Industry
Eligibility
18 Years to 85 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Brentwood, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 18, 2022 · Synced Oct 24, 2026, 1:36 PM EDT
Recruiting Not applicable Interventional

Using E-Nose Technology to Measure Response to Treatment in People With Malignant Pleural Mesothelioma

NCT06037941
View directory record Official record
Conditions
Malignant Pleural Mesothelioma
Interventions
E-Nose testing, Research blood
Diagnostic Test
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
30 Years to 85 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
7
States / cities
Basking Ridge, New Jersey • Middletown, New Jersey • Montvale, New Jersey + 4 more
Source: ClinicalTrials.gov public record
Updated Sep 24, 2026 · Synced Oct 24, 2026, 1:36 PM EDT
Completed Phase 1 Interventional

Study of the Safety and Efficacy of Dichloroacetate (DCA) in Glioblastoma and Other Recurrent Brain Tumors

NCT01111097
View directory record Official record
Conditions
Brain Tumor, Glioblastoma
Interventions
Dichloroacetate
Drug
Lead sponsor
University of Florida
Other
Eligibility
21 Years to 90 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Sep 22, 2015 · Synced Oct 24, 2026, 1:36 PM EDT
Recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

Hyperpolarized Xenon-129 MR Imaging of the Lung

NCT04662658
View directory record Official record
Conditions
E-Cig Use
Interventions
Hyperpolarized Xenon -129 MRI
Drug
Lead sponsor
University of Virginia
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Dec 10, 2020 · Synced Oct 24, 2026, 1:36 PM EDT
Completed Phase 2 Interventional Results available

BREATHID Octanoate Breath Test With or Without Methacetin Breath Test for Correlation With Biopsy in NASH

NCT02314026
View directory record Official record
Conditions
Non-Alcoholic Steatohepatitis
Interventions
Suspected NASH BreathID test with 13C-Octanoate, Suspected NASH Breath test with 13C Methacetin
Device
Lead sponsor
Meridian Bioscience, Inc.
Industry
Eligibility
18 Years and older
Enrollment
140 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
8
States / cities
Chicago, Illinois • Forts Sam Houston, Texas • Houston, Texas + 3 more
Source: ClinicalTrials.gov public record
Updated Dec 20, 2022 · Synced Oct 24, 2026, 1:36 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Improving Diagnostic Standards in Dysphagia

NCT04773184
View directory record Official record
Conditions
Dysphagia
Interventions
Fiberoptic Endoscopic Evaluation of Swallowing, Videofluoroscopic Swallowing Study, Voluntary Peak Cough Flow Testing, Iowa Oral Performance Instrument, Capsaicin Challenge, Pulmonary Function Testing, Voicing Tasks
Procedure · Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 90 Years
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 17, 2024 · Synced Oct 24, 2026, 1:36 PM EDT
Completed No phase listed Observational

Wearable Electronic Breath Sound Sensing Device

NCT06734793
View directory record Official record
Conditions
Asthma in Children, Asthma Attack
Interventions
Wearable stethoscope, Routine Clinical lung Auscultation
Device · Other
Lead sponsor
Emory University
Other
Eligibility
6 Years to 17 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Oct 24, 2026, 1:36 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

ABCA2 GIRMS Analytical Validation Clinical Performance Study

NCT04607304
View directory record Official record
Conditions
Gastroparesis
Interventions
ABCA2 GIRMS
Device
Lead sponsor
Cairn Diagnostics
Industry
Eligibility
18 Years to 85 Years
Enrollment
95 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Brentwood, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 30, 2021 · Synced Oct 24, 2026, 1:36 PM EDT
Not listed Phase 4 Interventional

Lexiscan(TM) Rb-82 Myocardial Perfusion PET: A Comparison With Dipyridamole Stress

NCT00808314
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
Rest/Dipyridamole Stress Rb-82 Myocardial Perfusion PET/CT, Rest/Lexiscan(TM) Stress Rb-82 Myocardial Perfusion PET
Drug
Lead sponsor
Cardiovascular Imaging Technologies
Industry
Eligibility
35 Years to 90 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 2, 2012 · Synced Oct 24, 2026, 1:36 PM EDT
Completed Not applicable Interventional

Pilot Study of Physiological Effect of High-Flow Nasal Cannula on Respiratory Pattern and Work of Breathing

NCT02514798
View directory record Official record
Conditions
COPD
Interventions
Esophageal and gastric balloons, Respiratory Inductance Plethysmography (RIP) system, Sentec transcutaneous monitoring system, High-flow humidified nasal oxygen delivery system, CPAP (Positive Control)
Other · Device
Lead sponsor
Tufts Medical Center
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 10, 2022 · Synced Oct 24, 2026, 1:36 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Small Airway Chronic Obstructive Disease Syndrome Following Exposure to WTC Dust

NCT03089515
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease, Lower Respiratory Disease
Interventions
Cardio-Pulmonary Exercise Testing (CPET)
Other
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 75 Years
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 24, 2022 · Synced Oct 24, 2026, 1:36 PM EDT
Completed No phase listed Observational

Prognostic Value of Rb-82 PET Myocardial Perfusion Imaging

NCT01474577
View directory record Official record
Conditions
Cardiac Health
Interventions
questionnaire
Other
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
57 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 9, 2018 · Synced Oct 24, 2026, 1:36 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Transit Time and Bacterial Overgrowth Using SmartPill Capsule

NCT00577772
View directory record Official record
Conditions
Small Bowel Bacterial Overgrowth, Gastrointestinal Diseases, Stomach Diseases, Digestive System Diseases
Interventions
Xifaxan, SmartPill, Lactulose hydrogen breath test (H_2BT)
Drug · Device · Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Oct 5, 2012 · Synced Oct 24, 2026, 1:36 PM EDT
Recruiting Not applicable Interventional

A Pilot Study Examining Low Sulfur Diet as Treatment for Persistent Symptoms in Quiescent Crohn's Disease

NCT05849012
View directory record Official record
Conditions
Crohn's Disease in Remission
Interventions
Low Sulfur Diet, Usual Diet
Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 15, 2026 · Synced Oct 24, 2026, 1:36 PM EDT
Terminated No phase listed Interventional Results available

Companion Protocol for Methacetin Breath Test (MBT) in Conatus Protocol IDN-6556-17

NCT03462576
View directory record Official record
Conditions
Decompensated Cirrhosis
Interventions
Methacetin Breath Test, Emricasan, Placebo oral capsule
Combination Product · Drug
Lead sponsor
Meridian Bioscience, Inc.
Industry
Eligibility
18 Years and older
Enrollment
199 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Lakewood Rch, Florida
Source: ClinicalTrials.gov public record
Updated Dec 20, 2022 · Synced Oct 24, 2026, 1:36 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Exhaled Breath Condensate Biomarkers of Inflammation in Individuals With Chronic Cervical Spinal Cord Injury

NCT02235714
View directory record Official record
Conditions
Tetraplegia, Asthma
Interventions
Not listed
Lead sponsor
James J. Peters Veterans Affairs Medical Center
Federal
Eligibility
18 Years to 89 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Sep 10, 2014 · Synced Oct 24, 2026, 1:36 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Home-Based Respiratory Muscle Training and Aerobic Exercise Programs to Improve Lung Health in Current and Former Cigarette Smokers

NCT07553819
View directory record Official record
Conditions
Lung Carcinoma
Interventions
Accelerometry, Aerobic Exercise, Biospecimen Collection, Educational Intervention, Electronic Health Record Review, Physical Performance Testing, Respiratory Muscle Training, Supportive Care, Survey Administration
Procedure · Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
50 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Aug 21, 2026 · Synced Oct 24, 2026, 1:36 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Smoking Cessation for Veterans With Severe and Persistent Mental Illness

NCT00960375
View directory record Official record
Conditions
Schizoaffective Disorder, Schizophrenia, Affective Psychosis, Bipolar, Affective Disorders, Psychotic
Interventions
BTSCS, StSST
Behavioral
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years to 75 Years
Enrollment
179 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
2
States / cities
Washington D.C., District of Columbia • Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 18, 2015 · Synced Oct 24, 2026, 1:36 PM EDT
Completed Phase 4 Interventional Results available

Yield of Diagnostic Tests and Effects of Crofelemer for Chronic Idiopathic Diarrhea In Non-HIV Patients

NCT03898856
View directory record Official record
Conditions
Chronic Diarrhea of Unknown Origin
Interventions
Crofelemer, Diagnostic tests for cause of chronic diarrhea
Drug · Diagnostic Test
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 75 Years
Enrollment
93 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 12, 2026 · Synced Oct 24, 2026, 1:36 PM EDT
Completed Phase 1 Interventional Results available

Effect of Lubiprostone on Methanogenesis and Bowel Function in Chronic Constipation.

NCT01190020
View directory record Official record
Conditions
Chronic Constipation, Methanogenesis
Interventions
Lubiprostone, Lubiprostone Control
Drug
Lead sponsor
Augusta University
Other
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
2
States / cities
Iowa City, Iowa • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 15, 2019 · Synced Oct 24, 2026, 1:36 PM EDT