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ClinicalTrials.gov public records Last synced Oct 20, 2026, 9:44 PM EDT

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Showing 1–24 of 97 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Breath Tests Clear all
Completed Phase 1Phase 2 Interventional Results available

Breakthrough Dyspnea Fentanyl Study in Cancer Patients

NCT01515566
View directory record Official record
Conditions
Advanced Cancers, Dyspnea
Interventions
Fentanyl, Placebo, Walking Tests, Questionnaires
Drug · Other · Behavioral
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 22, 2014 · Synced Oct 20, 2026, 9:44 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 20, 2026, 9:44 PM EDT
Completed No phase listed Observational

Breath Test for Chemicals (Volatile Organic Compounds)

NCT01437033
View directory record Official record
Conditions
Breath Tests, Human Volunteers, Pilot Study
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
30 Years to 60 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 5, 2018 · Synced Oct 20, 2026, 9:44 PM EDT
Terminated Not applicable Interventional Results available

Exhaled Breath Analysis to Predict Risk of Symptomatic Pneumonitis

NCT04040244
View directory record Official record
Conditions
Pneumonitis, Nonsmall Cell Lung Cancer Stage III
Interventions
Exhaled Breath Collection, Blood sample
Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 11, 2023 · Synced Oct 20, 2026, 9:44 PM 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 20, 2026, 9:44 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

13C-Pyruvate Breath Test

NCT01807702
View directory record Official record
Conditions
Healthy
Interventions
13C-Pyruvate 13C-lactate and dichloroacetate
Drug
Lead sponsor
University of Florida
Other
Eligibility
21 Years to 50 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Dec 2, 2015 · Synced Oct 20, 2026, 9:44 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Multi-Component Breath Alcohol Intervention Phase 3

NCT06994962
View directory record Official record
Conditions
Alcohol Use, Alcohol Drinking, Drinking Behavior
Interventions
Alcohol-related mobile health technologies, Motivational interview and psychoeducation on blood/breath alcohol concentration, Lower tech facilitation, Higher tech facilitation, Alcohol Education, Alcohol Education Technology
Device · Behavioral
Lead sponsor
Northeastern University
Other
Eligibility
18 Years to 25 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 20, 2026 · Synced Oct 20, 2026, 9:44 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Ultra-Processed Foods, Palatability, Appetite, and Gastrointestinal Transit

NCT07600281
View directory record Official record
Conditions
Appetite, Gastrointestinal Transit, Food Processing, Food Palatability, Eating Behavior
Interventions
Palatable Ultra-Processed Food Meal, Unpalatable Ultra-Processed Food Meal, Palatable Non-Ultra-Processed Food Meal, Unpalatable Non-Ultra-Processed Food Meal
Other
Lead sponsor
Purdue University
Other
Eligibility
18 Years to 60 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated May 22, 2026 · Synced Oct 20, 2026, 9:44 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Novel Breath Test to Detect Early Stage Chronic Pancreatitis

NCT01184573
View directory record Official record
Conditions
Chronic Pancreatitis
Interventions
Not listed
Lead sponsor
Metabolic Solutions Inc.
Industry
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 10, 2014 · Synced Oct 20, 2026, 9:44 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 20, 2026, 9:44 PM EDT
Terminated No phase listed Observational

Breath Test to Assess Hepatic Metabolic Reserve and to Predict Hepatic Decompensation in Cirrhotics

NCT00375011
View directory record Official record
Conditions
Cirrhosis
Interventions
Not listed
Lead sponsor
Meridian Bioscience, Inc.
Industry
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
2
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Dec 20, 2022 · Synced Oct 20, 2026, 9:44 PM 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 20, 2026, 9:44 PM 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 10, 2026 · Synced Oct 20, 2026, 9:44 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 20, 2026, 9:44 PM 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 18, 2023 · Synced Oct 20, 2026, 9:44 PM EDT
Completed No phase listed Observational

COVID Breath Test - Ancon

NCT04760639
View directory record Official record
Conditions
Covid19
Interventions
Breath test
Diagnostic Test
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Nov 14, 2022 · Synced Oct 20, 2026, 9:44 PM 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 6, 2023 · Synced Oct 20, 2026, 9:44 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Breath Analysis Technique to Diagnose Pulmonary Embolism

NCT00368836
View directory record Official record
Conditions
Pulmonary Embolism
Interventions
BreathScreen PE
Device
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
475 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Charlotte, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 21, 2022 · Synced Oct 20, 2026, 9:44 PM EDT
Terminated No phase listed Observational

Gastric Emptying Using Two Imaging Methods for Those Who Have Undergone POSE2 Weight Loss Procedure

NCT04502732
View directory record Official record
Conditions
Weight Loss
Interventions
NSSM and GEBT
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
22 Years to 65 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 2, 2023 · Synced Oct 20, 2026, 9:44 PM EDT
Terminated Not applicable Interventional Results available

Methacetin Breath Test in Patients With Liver Disease Secondary to Heart Disease

NCT04176458
View directory record Official record
Conditions
Dilated Cardiomyopathy, Tricuspid Atresia
Interventions
Methacetin Breath Test (MBT)
Device
Lead sponsor
Northwestern University
Other
Eligibility
18 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 5, 2023 · Synced Oct 20, 2026, 9:44 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Towards a Wearable Alcohol Biosensor: Examining the Accuracy of BAC Estimates From New-Generation Transdermal Technology Using Large-Scale Human Testing and Machine Learning Algorithms

NCT05692830
View directory record Official record
Conditions
Alcohol Drinking, Alcohol Intoxication
Interventions
Alcohol
Drug
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
21 Years and older
Enrollment
240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Champaign, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 6, 2025 · Synced Oct 20, 2026, 9:44 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 20, 2026, 9:44 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 20, 2026, 9:44 PM EDT
Recruiting No phase listed Observational

Cardiopulmonary Exercise Testing and Oscillometry for the Evaluation of Dyspnea

NCT06554353
View directory record Official record
Conditions
Breathing, Mouth, Lung Function Decreased, Dyspnea, Shortness of Breath
Interventions
Oscillometer
Device
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older
Enrollment
50 participants
Timeline
2024 – 2026
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Oct 20, 2026, 9:44 PM EDT