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ClinicalTrials.gov public records Last synced Oct 21, 2026, 9:06 PM EDT

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

Showing 1–24 of 97 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: expired air Clear all
Not listed No phase listed Observational

Serial Exhaled Breath pH Monitoring

NCT00330603
View directory record Official record
Conditions
Gastroesophageal Reflux
Interventions
Serial exhaled breath collections
Procedure
Lead sponsor
University of Virginia
Other
Eligibility
5 Years and older
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 8, 2011 · Synced Oct 21, 2026, 9:06 PM EDT
Recruiting Not applicable Interventional

Hypoxia Pathways for Early Recovery After Spinal Cord Injury

NCT07002437
View directory record Official record
Conditions
Spinal Cord Injuries (SCI)
Interventions
Augmented Acute Intermittent Hypoxia (aAIH), Acute Intermittent Hypercapnic-Hypoxia (AIHH), Sham AIH
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 70 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Dec 3, 2025 · Synced Oct 21, 2026, 9:06 PM EDT
Terminated Not applicable Interventional

Effects of Chemoradiation and Surgery on Cardiopulmonary Fitness and Tumor Neoplastic Phenotype in Gastrointestinal Malignancies

NCT02235441
View directory record Official record
Conditions
Pathologically Proven Gastrointestinal Malignancy, Plan of Care Must Include Chemoradiation
Interventions
Cardiopulmonary Exercise Test (CPET)
Other
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 11, 2017 · Synced Oct 21, 2026, 9:06 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Non-invasive Measurement of Cerebrovascular Reactivity After Traumatic Brain Injury

NCT02990078
View directory record Official record
Conditions
TBI
Interventions
Sildenafil citrate, Functional Near Infared Spectroscopy, Hypercapnia Challenge
Drug · Device · Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 13, 2022 · Synced Oct 21, 2026, 9:06 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Exhaled Nitric Oxide in Respiratory Syncytial Virus (RSV) Bronchiolitis: a Pilot Study

NCT01090557
View directory record Official record
Conditions
RSV Infection, Bronchiolitis
Interventions
Collection of exhaled breath
Other
Lead sponsor
Winthrop University Hospital
Other
Eligibility
1 Day to 4 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Mineola, New York
Source: ClinicalTrials.gov public record
Updated Mar 22, 2010 · Synced Oct 21, 2026, 9:06 PM EDT
Completed No phase listed Observational

Using Exhaled Air to Determine Changes in Nutritional Status of Patients on Intravenous Nutrition

NCT02843256
View directory record Official record
Conditions
Obesity, Malnourished, Fasting
Interventions
Isomark Canary
Device
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Nov 28, 2017 · Synced Oct 21, 2026, 9:06 PM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

Concurrent PET D2/D3 Receptor Imaging and fMRI Smoking Cue Reactivity in Smokers

NCT01784016
View directory record Official record
Conditions
Nicotine Dependence, Smoking Cue Reactivity, Relapse to Smoking
Interventions
[11C]-PHNO
Radiation
Lead sponsor
Mclean Hospital
Other
Eligibility
18 Years to 50 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
3
States / cities
Belmont, Massachusetts • Boston, Massachusetts • Charlestown, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 23, 2014 · Synced Oct 21, 2026, 9:06 PM EDT
Completed Not applicable Interventional

FLO2 for Recovery After SCI

NCT03833674
View directory record Official record
Conditions
Spinal Cord Injury (SCI)
Interventions
Daily AIH Block, Sham dAIH Block, Respiratory Strength Training Block, AIH + Strength Training Block
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 70 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated May 29, 2024 · Synced Oct 21, 2026, 9:06 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

The Measurement of Chemicals in Exhaled Breath Can Identify If a Person is Infected with COVID-19

NCT06571136
View directory record Official record
Conditions
COVID-19
Interventions
Not listed
Lead sponsor
N5 Sensors
Industry
Eligibility
18 Years to 70 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Everett, Washington
Source: ClinicalTrials.gov public record
Updated Nov 20, 2024 · Synced Oct 21, 2026, 9:06 PM EDT
Recruiting No phase listed Observational

Effect of Alcohol and Drugs of Abuse on Immune Function in Critically Ill Patients With Respiratory Failure

NCT02299921
View directory record Official record
Conditions
Infection, Alcohol Abuse, Drugs of Abuse, Lung Injury
Interventions
Characterize alcohol and drug use
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 90 Years
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2029
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Oct 8, 2024 · Synced Oct 21, 2026, 9:06 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Breath Condensate Study in Patients With Cystic Fibrosis.

NCT02056132
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Exhaled Breath Condensate
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2023
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Aug 25, 2023 · Synced Oct 21, 2026, 9:06 PM EDT
Recruiting No phase listed Observational

Cough Capture as a Portal Into the Lung

NCT05854563
View directory record Official record
Conditions
Lung Diseases, Lung Cancer, Lung Diseases, Obstructive, Lung Diseases, Interstitial, Lung Inflammation
Interventions
Observational only, all subjects; measure DNA mutation and proteomic survey.
Other
Lead sponsor
Albert Einstein College of Medicine
Other
Eligibility
21 Years and older
Enrollment
2,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced Oct 21, 2026, 9:06 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 21, 2026, 9:06 PM EDT
Not listed No phase listed Observational

Continuous Exhaled Breath Condensate pH in Mechanically Ventilated Patients

NCT00429637
View directory record Official record
Conditions
Respiratory Distress Syndrome, Adult, Respiratory Syncytial Virus Infections, Pneumonia, Acute Lung Injury
Interventions
Not listed
Lead sponsor
University of Virginia
Other
Eligibility
1 Hour and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2009
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 7, 2008 · Synced Oct 21, 2026, 9:06 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Metabolic Changes in the Activated Human Visual Cortex During Mild Hypoxia

NCT02482571
View directory record Official record
Conditions
Brain Hypoxia
Interventions
Mild Hypoxia
Device
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 40 Years · Male only
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 19, 2019 · Synced Oct 21, 2026, 9:06 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Testing Spectrosense EVA System for Detection of Pancreatic Cancer by Analyzing Volatile Organic Compounds (VOCs) in Exhaled Air

NCT01994681
View directory record Official record
Conditions
Pancreatic Cancer
Interventions
Not listed
Lead sponsor
Rauscher, Gregory E., M.D. PA
Individual
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2013
U.S. locations
1
States / cities
Hackensack, New Jersey
Source: ClinicalTrials.gov public record
Updated Dec 5, 2013 · Synced Oct 21, 2026, 9:06 PM EDT
Not yet recruiting No phase listed Observational

Quantifying the Burden of Type 2 (T2) Inflammation in Asthma

NCT07675044
View directory record Official record
Conditions
Asthma, Type 2 Asthma
Interventions
FeNO Breath Test
Diagnostic Test
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Oct 21, 2026, 9:06 PM EDT
Completed Not applicable Interventional Results available

Promoting Risk Reduction Among Young Adults With Asthma During Wildfire Smoke Events (TRAK)

NCT04724733
View directory record Official record
Conditions
Asthma
Interventions
Smoke Sense, Smoke Sense Plus
Behavioral
Lead sponsor
Washington State University
Other
Eligibility
18 Years to 26 Years
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Spokane, Washington
Source: ClinicalTrials.gov public record
Updated Apr 28, 2023 · Synced Oct 21, 2026, 9:06 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Lower Extremity BFR-randomized Controlled Trial Healthy Volunteers

NCT05868304
View directory record Official record
Conditions
Healthy
Interventions
BFR, Stanard strengthening program.
Device · Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 25, 2025 · Synced Oct 21, 2026, 9:06 PM EDT
Completed Not applicable Interventional Results available

Vitabreath Pilot in Chronic Obstructive Pulmonary Disease (COPD) Patients

NCT03349437
View directory record Official record
Conditions
COPD, Dyspnea
Interventions
Vitabreath Device, Pursed Lip Breathing
Device · Other
Lead sponsor
Philips Respironics
Industry
Eligibility
40 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
2
States / cities
Youngstown, Ohio • Jefferson Hills, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 8, 2019 · Synced Oct 21, 2026, 9:06 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Carbon Monoxide Monitor for the Measurement of End-Tidal Carbon Monoxide Levels in Children With or Without Hemolysis

NCT01848691
View directory record Official record
Conditions
Sickle Cell Anemia
Interventions
Measurement of carbon monoxide level in exhaled breath
Other
Lead sponsor
Ashutosh Lal
Other
Eligibility
5 Years to 14 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Oakland, California
Source: ClinicalTrials.gov public record
Updated Jun 2, 2014 · Synced Oct 21, 2026, 9:06 PM EDT
Recruiting Not applicable Interventional

Effects of Lung Volume on Upper Airway Patency During Drug Induced Sleep Endoscopy

NCT05350332
View directory record Official record
Conditions
Obstructive Sleep Apnea
Interventions
Negative Pressure Ventilator, Pulmonary Function Testing (PFT), Transcutaneous Phrenic Nerve Stimulation, Percutaneous Phrenic Nerve Stimulation
Device
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
151 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 26, 2026 · Synced Oct 21, 2026, 9:06 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Biomarkers in Exhaled Breath From Asthmatic Patients

NCT00635271
View directory record Official record
Conditions
Asthma
Interventions
Not listed
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years to 75 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 5, 2019 · Synced Oct 21, 2026, 9:06 PM EDT
Completed Not applicable Interventional

Palliative Oxygen for the Relief of Breathlessness

NCT00327873
View directory record Official record
Conditions
Dyspnea
Interventions
Oxygen, Medical Air
Other
Lead sponsor
National Health and Medical Research Council, Australia
Other
Eligibility
18 Years and older
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 14, 2009 · Synced Oct 21, 2026, 9:06 PM EDT