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ClinicalTrials.gov public records Last synced Sep 23, 2026, 2:48 AM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Breath sample collection Clear all
Completed No phase listed Observational

Longitudinal Evaluation of HIV-associated Lung Disease Phenotypes

NCT02238327
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease, HIV, Emphysema
Interventions
blood draw, questionnaires, Lung function testing, Six-Minute walk test, Quantitative CT scans, Nasal secretion and cell collection, Echocardiogram
Procedure · Radiation
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 80 Years
Enrollment
232 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 7, 2020 · Synced Sep 23, 2026, 2:48 AM 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 – 2026
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 21, 2025 · Synced Sep 23, 2026, 2:48 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Role of Acetaldehyde in the Development of Oral Cancer

NCT05973656
View directory record Official record
Conditions
Alcohol-Related Carcinoma, Fanconi Anemia, Oral Cavity Carcinoma
Interventions
Alcohol, Biospecimen Collection, Breath Test
Drug · Procedure
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
18 Years to 45 Years
Enrollment
170 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Sep 23, 2026, 2:48 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Impact of Novel vs. Usual Brand Menthol Cigarettes on Abuse Liability

NCT07564648
View directory record Official record
Conditions
Cigarette Addiction, Tobacco Use Disorder
Interventions
Biospecimen Collection, Questionnaire Administration, Cigarette Purchase Task, Cross-Price Elasticity Task, Daily Diary Surveys, Progressive Ratio Task
Behavioral
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
21 Years and older
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Sep 23, 2026, 2:48 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Project 4A: Inspiratory Muscle Training and Diaphragm Strength

NCT02367170
View directory record Official record
Conditions
Sepsis
Interventions
Bilateral phrenic nerve stimulation and measurement of transdiaphragmatic pressure, Midazolam, Volitional Measurement of Maximal Inspiratory Pressure (MIP), Inspiratory Muscle Strength Training (IMST), SHAM Inspiratory Muscle Strength Training (IMST), Diaphragm thickness measurement, Blood and Urine samples
Procedure · Drug · Device + 1 more
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated May 6, 2018 · Synced Sep 23, 2026, 2:48 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Development of 4D Flow MRI for Risk Stratification of Variceal Bleeding in Cirrhosis

NCT04867954
View directory record Official record
Conditions
Cirrhosis, Liver, Gastroesophageal Varices, Fontan Procedure
Interventions
Ensure Plus®, Pre-clinical validation contrast enhanced MRI, Clinical validation MRI, Pre-clinical validation contrast enhanced MRI + fasting
Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jul 7, 2026 · Synced Sep 23, 2026, 2:48 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Cue Reactivity in Virtual Reality: The Role of Context

NCT00862927
View directory record Official record
Conditions
Smoking
Interventions
Breath Sample, Saliva Sample, Questionnaire, View Virtual Reality Scenes
Other · Behavioral
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 19, 2012 · Synced Sep 23, 2026, 2:48 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Defining a PD-specific Breath Fingerprint of Underlying Inflammatory and Neurodegenerative Processes

NCT02749214
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Blood Sample Collection, Breath Sample Collection
Other
Lead sponsor
Emory University
Other
Eligibility
25 Years to 85 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 17, 2019 · Synced Sep 23, 2026, 2:48 AM EDT
Completed Not applicable Interventional

Study to Evaluate NA-NOSE for Monitoring and Detecting Recurrence in Early Stage Lung Cancer

NCT01840150
View directory record Official record
Conditions
Stage IA Non-small Cell Lung Cancer, Stage IB Non-small Cell Lung Cancer, Stage IIA Non-small Cell Lung Cancer, Stage IIB Non-small Cell Lung Cancer
Interventions
breath test, laboratory biomarker analysis
Procedure · Other
Lead sponsor
Fox Chase Cancer Center
Other
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2019
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 12, 2023 · Synced Sep 23, 2026, 2:48 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Volatile Organic Compounds (VOCs) in Active Inflammatory Bowel Disease

NCT04827368
View directory record Official record
Conditions
IBD, Crohn Disease, Ulcerative Colitis
Interventions
Breath Test
Other
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
292 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 23, 2026, 2:48 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

A Study of Treprostinil to Treat Interstitial Lung Disease Pulmonary Hypertension

NCT05564637
View directory record Official record
Conditions
Pulmonary Arterial Hypertension, Interstitial Lung Disease, Healthy Adults
Interventions
Treprostinil, Right Heart Catheterization (RHC) while exercising, Optional Muscle Biopsy
Drug · Diagnostic Test
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 2, 2025 · Synced Sep 23, 2026, 2:48 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Breath Analysis Based Disease Biomarkers

NCT04341012
View directory record Official record
Conditions
Liver Diseases, Liver Cancer, COVID19
Interventions
Collection of breath sample
Diagnostic Test
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 25, 2026 · Synced Sep 23, 2026, 2:48 AM EDT
Completed No phase listed Observational

COVID-19 Respiratory Outcomes Registry

NCT05074875
View directory record Official record
Conditions
Covid19
Interventions
Questionnaires and Patient Reported Outcomes (PROs), Nasal Swab COVID-19 reverse transcription polymerase chain reaction test (RT-PCR), Blood Samples for Biomarkers, High Resolution Computed Tomography, Physical Exam and Vital Signs, Medical Research Council Sum Score, Hand Grip Strength, Spirometry, Diffusing Capacity of Carbon Monoxide, 6 Minute Walk Test, Sit to Stand (STS) Measurement
Other · Diagnostic Test · Genetic
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years and older
Enrollment
37 participants
Timeline
2021 – 2023
U.S. locations
4
States / cities
St Louis, Missouri • New York, New York • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 26, 2023 · Synced Sep 23, 2026, 2:48 AM EDT
Recruiting Not applicable Interventional

Miniaturized Breath-based Sensor for the Detection of Hypo- and Hyperglycemia

NCT07696273
View directory record Official record
Conditions
Diabetes, Hyperglycemia, Hypoglycemia (Diabetic)
Interventions
Sensing Device and Tedlar Bags
Device
Lead sponsor
Indiana University
Other
Eligibility
7 Years to 25 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Sep 23, 2026, 2:48 AM EDT
Completed Not applicable Interventional

Surrogate Markers of Portal Pressure

NCT02508298
View directory record Official record
Conditions
Portal Hypertension, Cirrhosis
Interventions
HVPG, Indocyanine Green Retention test, Liver stiffness measurement, Spleen stiffness measurement
Procedure · Drug · Device
Lead sponsor
VA Connecticut Healthcare System
Federal
Eligibility
18 Years to 85 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
2
States / cities
New Haven, Connecticut • West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Nov 24, 2019 · Synced Sep 23, 2026, 2:48 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Strategies to Augment Ketosis: Optimization of Ketone Delivery Strategies

NCT05501366
View directory record Official record
Conditions
Ketosis
Interventions
Ketone Supplement, Beverage Tolerability Questionnaire (BTQ) and satiety visual analogue scale, Blood Draw, Breath Reading, Heart Rate Variability, CGM/CKM, DXA, Urine Analysis
Dietary Supplement · Behavioral · Biological + 2 more
Lead sponsor
Ohio State University
Other
Eligibility
20 Years to 30 Years · Male only
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 28, 2026 · Synced Sep 23, 2026, 2:48 AM 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 20, 2026 · Synced Sep 23, 2026, 2:48 AM EDT
Terminated No phase listed Observational

Analysis of Volatile Organic Compounds in the Breath of Lung Transplant Rejection Patients Using Infrared Spectroscopy

NCT06309628
View directory record Official record
Conditions
Lung Transplant Rejection
Interventions
Breathe sample
Diagnostic Test
Lead sponsor
Paragonix Technologies
Industry
Eligibility
18 Years and older
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated May 30, 2025 · Synced Sep 23, 2026, 2:48 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 22, 2026 · Synced Sep 23, 2026, 2:48 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Does Small Intestinal Bacterial Overgrowth Contribute to Functional Dyspepsia

NCT00956397
View directory record Official record
Conditions
Functional Dyspepsia, Small Intestinal Bacterial Overgrowth, Chronic Abdominal Discomfort
Interventions
Rifaximin, Lactulose Breath Test, Placebo
Drug · Procedure
Lead sponsor
Henry C. Lin, MD
Federal
Eligibility
21 Years and older
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2007
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Oct 23, 2012 · Synced Sep 23, 2026, 2:48 AM EDT
Terminated No phase listed Observational

Breath Metabolomics in the Laboring Parturient

NCT04564196
View directory record Official record
Conditions
Labor Onset and Length Abnormalities
Interventions
Breath Sample
Procedure
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older · Female only
Enrollment
53 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Jun 7, 2023 · Synced Sep 23, 2026, 2:48 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Analysis of Volatile Chemicals in Lung Cancer Screen-Eligible Subjects Using Infrared Spectroscopy

NCT05174468
View directory record Official record
Conditions
Lung Cancer
Interventions
Not listed
Lead sponsor
Breathe BioMedical Inc
Industry
Eligibility
50 Years to 80 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Nov 17, 2023 · Synced Sep 23, 2026, 2:48 AM EDT
Recruiting Phase 2 Interventional

Using E-Nose Technology to Track Treatment Response in People With Non-Small Cell Lung Cancer

NCT07218601
View directory record Official record
Conditions
Non-Small Cell Lung Cancer
Interventions
Breath sample collection, Research blood collection
Diagnostic Test
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 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 Mar 22, 2026 · Synced Sep 23, 2026, 2:48 AM EDT
Recruiting No phase listed Observational

The APS Phenotyping Study

NCT06521502
View directory record Official record
Conditions
ARDS, Sepsis, Pneumonia
Interventions
Blood collection, Urine Collection, Nasal, oral, and rectal swabs, Stool collection, Heat Moisture Exchange Filter collection, Tracheal Aspirate sample collection, Non-bronchoscopic bronchoalveolar lavage (NBBAL), Surveys, Short physical performance battery, Hand grip strength, CNS Vital Signs, Muscle Ultrasound, Muscle Strength, Spirometry, Lung Diffusion Testing (DLCO), Chest CT Scan
Other · Procedure · Radiation
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
4,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
20
States / cities
Fresno, California • Palo Alto, California • San Francisco, California + 12 more
Source: ClinicalTrials.gov public record
Updated Feb 19, 2026 · Synced Sep 23, 2026, 2:48 AM EDT