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Showing 1–22 of 22 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Pulmonary Gas Exchange Clear all
Recruiting Phase 2Phase 3 Interventional Accepts healthy volunteers

Dissolved Phase HXe-129 MRI: A Novel Biomarker to Quantify Pulmonary Pathology

NCT06856525
View directory record Official record
Conditions
Electronic Cigarette Related Lung Damage
Interventions
Hyperpolarized xenon 129, Cardiopulmonary Stress Test, Pulmonary Function Test, Chest CT
Drug · Diagnostic Test
Lead sponsor
Y. Michael Shim, MD
Other
Eligibility
18 Years to 35 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2032
U.S. locations
2
States / cities
Durham, North Carolina • Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Sep 9, 2026, 6:12 AM EDT
Completed Phase 1 Interventional

Iloprost Effects on Gas Exchange and Pulmonary Mechanics

NCT01274481
View directory record Official record
Conditions
Acute Respiratory Distress Syndrome, Acute Lung Injury, Pulmonary Hypertension
Interventions
Iloprost
Drug
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Aug 9, 2012 · Synced Sep 9, 2026, 6:12 AM EDT
Completed No phase listed Observational

Investigate the Aerosol Particle Distribution During Aerosol Generating Procedures

NCT04353531
View directory record Official record
Conditions
Transmission, Patient Professional, High-flow Nasal Cannula
Interventions
High-flow nasal cannula, Surgical mask, bronchoscopy examination, intubation, tracheostomy, nebulization, Pulmonary function test
Device · Procedure · Diagnostic Test
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 22, 2021 · Synced Sep 9, 2026, 6:12 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

129Xe MRI Cardiopulmonary

NCT06038630
View directory record Official record
Conditions
Interstitial Lung Disease, Chronic Thromboembolic Pulmonary Hypertension, Acute Pulmonary Embolism, Anemia, Polycythemia, Dyspnea
Interventions
Hyperpolarized Xe129, Oxygen Administration
Drug · Other
Lead sponsor
Bastiaan Driehuys
Other
Eligibility
18 Years and older
Enrollment
125 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 3, 2026 · Synced Sep 9, 2026, 6:12 AM EDT
Enrolling by invitation No phase listed Observational Accepts healthy volunteers

Distribution of Ventilation, Respiratory Drive and Gas Exchange: Measurements and Monitoring

NCT05462600
View directory record Official record
Conditions
Pulmonary Disease, Respiratory System Abnormalities, OSA, Respiratory Failure
Interventions
Position change
Other
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Apr 10, 2025 · Synced Sep 9, 2026, 6:12 AM EDT
Completed Not applicable Interventional

Iloprost in Gas Exchange/Pulm Mechanics in Chronic Obstructive Pulmonary Disease (COPD)

NCT00561223
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease, Pulmonary Hypertension
Interventions
iloprost Inhalation, iloprost
Drug
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 80 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2012
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Feb 14, 2024 · Synced Sep 9, 2026, 6:12 AM EDT
Completed No phase listed Observational

Ventilation and Perfusion in the Respiratory System

NCT05081895
View directory record Official record
Conditions
Respiratory Failure, Respiratory Distress Syndrome, Adult, Critical Illness, Pulmonary Disease, Ventilator-Induced Lung Injury
Interventions
Electrical Impedance tomography, Lung mechanics and gas exchange
Device · Other
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Dec 9, 2024 · Synced Sep 9, 2026, 6:12 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Evaluation Inhaled Corticosteroids on Exhaled Nitric Oxide Gas Exchange

NCT00568347
View directory record Official record
Conditions
COPD
Interventions
fluticasone 100mcg/ salmeterol 50mcg, fluticasone 250/salmeterol 50, Salmeterol, salmeterol and fluticasone propionate
Drug
Lead sponsor
Arthur F Gelb MD
Individual
Eligibility
20 Years to 85 Years
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2013
U.S. locations
1
States / cities
Lakewood, California
Source: ClinicalTrials.gov public record
Updated Mar 16, 2015 · Synced Sep 9, 2026, 6:12 AM EDT
Completed Phase 2 Interventional Results available

Assessing Response to Inhaled Prostacyclin With Hyperpolarized Xe MRI

NCT03367312
View directory record Official record
Conditions
Pulmonary Vascular Disease
Interventions
Hyperpolarized 129Xenon gas
Drug
Lead sponsor
Bastiaan Driehuys
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 17, 2023 · Synced Sep 9, 2026, 6:12 AM EDT
Completed Phase 2Phase 3 Interventional Results available

Effects of Bevespi on Ventilation and Gas Exchange Abnormalities in COPD Assessed by 129Xe MRI

NCT03324607
View directory record Official record
Conditions
COPD
Interventions
hyperpolarized 129Xe gas MRI, Bevespi Aerosphere
Drug
Lead sponsor
Bastiaan Driehuys
Other
Eligibility
40 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 18, 2021 · Synced Sep 9, 2026, 6:12 AM EDT
Completed Phase 2 Interventional Results available

Non-Invasive Diagnosis of Pulmonary Vascular Disease Using Inhaled 129Xe Magnetic Resonance Imaging

NCT03078192
View directory record Official record
Conditions
Pulmonary Vascular Disease
Interventions
GE-141, Hyperpolarized 129Xenon gas, MRI
Drug · Device
Lead sponsor
Bastiaan Driehuys
Other
Eligibility
18 Years and older
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 21, 2022 · Synced Sep 9, 2026, 6:12 AM EDT
Completed No phase listed Observational

Chest Wall Influence on Respiratory System Mechanics in Morbidly Obese Patients

NCT02105220
View directory record Official record
Conditions
Obesity, Intra-Abdominal Hypertension
Interventions
Respiratory mechanics assessment
Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 24, 2015 · Synced Sep 9, 2026, 6:12 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Unmasking Right Ventricular and Pulmonary Derangements With Exercise and Oxygen in Early Stage Cardiopulmonary Diseases

NCT03911856
View directory record Official record
Conditions
Cardiopulmonary Disease
Interventions
Echocardiography, Pulmonary Gas Exchange
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 80 Years
Enrollment
7 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 11, 2024 · Synced Sep 9, 2026, 6:12 AM EDT
Completed Phase 2 Interventional Results available

Hemodynamics and Extravascular Lung Water in Acute Lung Injury

NCT00624650
View directory record Official record
Conditions
Acute Lung Injury
Interventions
Diuresis (furosemide) part I, Fluid Bolus (crystalloid or albumin), Vasopressors (Norepinephrine, Vasopressin, Phenylephrine, Epinephrine), Dobutamine, Concentrate all drips and nutrition, Diuresis (furosemide) part II, Dialysis
Drug · Other · Procedure
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
3
States / cities
Clackamas, Oregon • Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Sep 9, 2019 · Synced Sep 9, 2026, 6:12 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

COPD-Related Physiology and the Brain

NCT03269721
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive (COPD), Cognitive Impairment
Interventions
Neuropsychological Assessment, Spirometry, Arterial Blood Gas, Diffusion Capacity of the Lung for Carbon Monoxide, 6 Minute Walk Test, Systemic Vascular Measures, Blood Biomarkers, Symptom Questionnaire Measures, Brain MRI
Behavioral · Procedure · Diagnostic Test + 1 more
Lead sponsor
Karin Hoth
Other
Eligibility
30 Years to 85 Years
Enrollment
170 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2025
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Dec 23, 2025 · Synced Sep 9, 2026, 6:12 AM EDT
Completed Not applicable Interventional

Effects of Nasal High-flow Oxygen in Patients With an Exacerbation of Chronic Obstructive Pulmonary Disease (COPD)

NCT03214458
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Nasal high flow
Device
Lead sponsor
Temple University
Other
Eligibility
40 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 18, 2018 · Synced Sep 9, 2026, 6:12 AM EDT
Active, not recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

Gas Exchange MRI to Visualize Regional Therapy Response in Interstitial Lung Disease

NCT06012500
View directory record Official record
Conditions
ILD
Interventions
Xenon-129
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
18 Years to 90 Years
Enrollment
78 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 12, 2026 · Synced Sep 9, 2026, 6:12 AM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

129Xe MRI in Pediatric Population With BPD

NCT04035629
View directory record Official record
Conditions
Bronchopulmonary Dysplasia
Interventions
MagniXene, hyperpolarized 129Xe MRI
Combination Product
Lead sponsor
Xemed LLC
Industry
Eligibility
Up to 1 Year
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2031
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 4, 2026 · Synced Sep 9, 2026, 6:12 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Optimizing and Standardizing 129Xe Gas Exchange MRI to Visualize Regional Therapy Response in Interstitial Lung Disease

NCT04855305
View directory record Official record
Conditions
Interstitial Lung Diseases
Interventions
Hyperpolarized 129Xe
Drug
Lead sponsor
Bastiaan Driehuys
Other
Eligibility
18 Years and older
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 4, 2026 · Synced Sep 9, 2026, 6:12 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Efficacy Study of Riociguat and Its Effects on Exercise Performance and Pulmonary Artery Pressure at High Altitude

NCT02024386
View directory record Official record
Conditions
Hypertension, Pulmonary, Altitude Sickness
Interventions
Riociguat
Drug
Lead sponsor
Richard Moon
Other
Eligibility
18 Years to 40 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 11, 2017 · Synced Sep 9, 2026, 6:12 AM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

The Effects of Sound Energy on Pulmonary Gas Exchange

NCT02447731
View directory record Official record
Conditions
Respiratory Failure
Interventions
Induction of sound waves in lungs by "sonic oscillator"
Device
Lead sponsor
Loma Linda University
Other
Eligibility
21 Years to 59 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated May 2, 2017 · Synced Sep 9, 2026, 6:12 AM EDT
Completed Phase 4 Interventional

Zileuton and Exhaled Nitric Oxide in Asthmatics

NCT00575861
View directory record Official record
Conditions
Asthma
Interventions
zileuton
Drug
Lead sponsor
Gelb, Arthur F., M.D.
Individual
Eligibility
21 Years to 80 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
Lakewood, California
Source: ClinicalTrials.gov public record
Updated Dec 19, 2007 · Synced Sep 9, 2026, 6:12 AM EDT