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ClinicalTrials.gov public records Last synced Sep 9, 2026, 2:29 AM EDT

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Showing 1–24 of 67 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Diagnostic Breath Analysis Clear all
Enrolling by invitation No phase listed Observational Accepts healthy volunteers

Non-Invasive Bioelectronic Analytics

NCT04100486
View directory record Official record
Conditions
Autonomic Dysfunction, Autonomic Imbalance, Autonomic Nervous System Diseases, Vagus Nerve Autonomic Disorder
Interventions
Standing-Squatting-Standing Test, Deep Breathing Test, Cold Pressor Test, Cold Face Test, Valsalva Maneuver, Transcutaneous Auricular Vagus Nerve Stimulation (taVNS)
Other · Device
Lead sponsor
Northwell Health
Other
Eligibility
18 Years to 60 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2027
U.S. locations
1
States / cities
Manhasset, New York
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Sep 9, 2026, 2:29 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 9, 2026, 2:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Manipulation of Breath Alcohol Tests: Can Specific Techniques Alter Blood Alcohol Concentration Readings?

NCT02580318
View directory record Official record
Conditions
Alcohol Concentration Values, Alcohol Intoxication
Interventions
breathalyzer
Device
Lead sponsor
St. Luke's Hospital and Health Network, Pennsylvania
Other
Eligibility
21 Years and older
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Bethlehem, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 14, 2017 · Synced Sep 9, 2026, 2:29 AM EDT
Active, not recruiting 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
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Sep 9, 2026, 2:29 AM EDT
Recruiting Not applicable Interventional

Monitoring Exhaled Breath to Noninvasively Detect Glycemic Events

NCT06893341
View directory record Official record
Conditions
Diabetes, Hyperglycemia, Hypoglycemia
Interventions
The Sensing Device
Device
Lead sponsor
Indiana University
Other
Eligibility
12 Years to 19 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated May 12, 2026 · Synced Sep 9, 2026, 2:29 AM EDT
Completed No phase listed Observational Results available

Effect of Alveolar Minute Ventilation on Respiratory Gas Heat Content

NCT01943227
View directory record Official record
Conditions
Ventilation Perfusion Mismatch
Interventions
controlled positive pressure ventilation 9ml/kg tidal volume, controlled positive pressure ventilation 6ml/kg tidal volume
Other
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Oct 27, 2019 · Synced Sep 9, 2026, 2:29 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Cardiovascular and Neurovascular Regulation in GWI

NCT04586049
View directory record Official record
Conditions
Brain Blood Flow, Neurovascular Control
Interventions
MRI, Transcranial Doppler Ultrasound, Sympathetic Nerve Activity
Device · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
45 Years to 68 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jun 7, 2026 · Synced Sep 9, 2026, 2:29 AM EDT
Completed Not applicable Interventional

4DX Functional Lung Imaging in the Diagnosis of Chronic Lung Allograft Dysfunction After Lung Transplantation

NCT04892719
View directory record Official record
Conditions
Lung Transplant; Complications
Interventions
Fluoroscopic chest imaging with 4Dx technology software analysis
Diagnostic Test
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 27, 2022 · Synced Sep 9, 2026, 2:29 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Breath Test for Early Detection of Lung Cancer

NCT00639067
View directory record Official record
Conditions
Lung Neoplasms
Interventions
Breath Collection Apparatus
Device
Lead sponsor
Menssana Research, Inc.
Industry
Eligibility
18 Years and older
Enrollment
215 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2013
U.S. locations
4
States / cities
Newark, Delaware • Orlando, Florida • New York, New York + 1 more
Source: ClinicalTrials.gov public record
Updated May 15, 2014 · Synced Sep 9, 2026, 2:29 AM 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 21, 2026 · Synced Sep 9, 2026, 2:29 AM EDT
Not yet recruiting Not applicable Interventional

Inhaled Nitric Oxide in Severe Obesity

NCT06675435
View directory record Official record
Conditions
Obesity, Respiratory Insufficiency, Hypoxemic Respiratory Failure, Nitric Oxide
Interventions
Nitric oxide
Device
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 19, 2026 · Synced Sep 9, 2026, 2:29 AM EDT
Completed No phase listed Observational

Measuring Exhaled Nitric Oxide (eNO) Using the Apieron INSIGHT System and the Aerocrine NIOX System

NCT00739531
View directory record Official record
Conditions
Asthma
Interventions
Exhaled nitric oxide (eNO)
Device
Lead sponsor
Apieron
Industry
Eligibility
5 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007
U.S. locations
2
States / cities
Shreveport, Louisiana • Lake Oswego, Oregon
Source: ClinicalTrials.gov public record
Updated Aug 20, 2008 · Synced Sep 9, 2026, 2:29 AM EDT
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 9, 2026, 2:29 AM EDT
Recruiting Phase 3 Interventional Accepts healthy volunteers

PyloPlus Urea Breath Test System Post Therapy Efficacy Confirmation Study

NCT05681689
View directory record Official record
Conditions
Helicobacter Pylori Infection, Post-Treatment, Efficacy
Interventions
PyloPlus UBT System, Histology, Rapid Urease Test, Comparator Breath Test, Stool Antigen Test
Combination Product · Diagnostic Test
Lead sponsor
ARJ Medical, Inc.
Industry
Eligibility
18 Years and older
Enrollment
77 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
2
States / cities
Doral, Florida • Union City, New Jersey
Source: ClinicalTrials.gov public record
Updated May 5, 2023 · Synced Sep 9, 2026, 2:29 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Risk Assessment Evaluation for Identifying Participants at High Risk for Stomach Cancer

NCT06408220
View directory record Official record
Conditions
Gastric Carcinoma
Interventions
Biopsy, Biospecimen Collection, Breath Test, Esophagogastroduodenoscopy, Questionnaire Administration
Procedure · Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
40 Years to 80 Years
Enrollment
240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2029
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Sep 9, 2026, 2:29 AM 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 2, 2024 · Synced Sep 9, 2026, 2:29 AM EDT
Completed Phase 3 Interventional Results available

Urea Breath Test (UBT) With Breath Hp System /BreathID Hp Lab System Pediatrics

NCT02905825
View directory record Official record
Conditions
Helicobacter Pylori Infection
Interventions
BreathID® Hp System, BreathID® Hp Lab System, Stool Test
Device · Drug · Diagnostic Test
Lead sponsor
Meridian Bioscience, Inc.
Industry
Eligibility
3 Years to 18 Years
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
5
States / cities
Shreveport, Louisiana • Flowood, Mississippi • Nashville, Tennessee + 2 more
Source: ClinicalTrials.gov public record
Updated Dec 19, 2022 · Synced Sep 9, 2026, 2:29 AM 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 3, 2026 · Synced Sep 9, 2026, 2:29 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 9, 2025 · Synced Sep 9, 2026, 2:29 AM EDT
Completed No phase listed Observational

Screening Strategy for Early Diagnosis of Silicosis in At-Risk Populations in Oklahoma

NCT04205708
View directory record Official record
Conditions
Silicosis, Pneumoconiosis; Silica
Interventions
Tuberculosis test, Chest X-ray, Pulmonary Function Test
Diagnostic Test
Lead sponsor
University of Oklahoma
Other
Eligibility
30 Years and older
Enrollment
183 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Dec 5, 2023 · Synced Sep 9, 2026, 2:29 AM EDT
Completed Not applicable Interventional Results available

Vivatmo Pro™ for Fractional Exhaled Nitric Oxide (FeNO) Monitoring in U.S. Asthmatic Patients

NCT04450108
View directory record Official record
Conditions
Asthma, Asthma in Children
Interventions
Vivatmo pro FeNO Test
Diagnostic Test
Lead sponsor
Bosch Healthcare Solutions GmbH
Industry
Eligibility
7 Years to 80 Years
Enrollment
122 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
6
States / cities
Birmingham, Alabama • Bakersfield, California • White Marsh, Maryland + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 5, 2022 · Synced Sep 9, 2026, 2:29 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 13, 2025 · Synced Sep 9, 2026, 2:29 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 9, 2026, 2:29 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 11, 2026 · Synced Sep 9, 2026, 2:29 AM EDT