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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Gas Clear all
Terminated Not applicable Interventional Accepts healthy volunteers

Gas Supply, Demand and Middle Ear Gas Balance -- Diagnosis of Eustachian Tube Dysfunction

NCT01974726
View directory record Official record
Conditions
Eustachian Tube Dysfunction
Interventions
ET Stress test, Sonotubometry, Forced Response Test (FRT), Inflation Deflation Test (IDT), Maneuver Sequence, 9-Step Test, Tubomanometry, Videoendoscopic assessment of ETF, Pressure chamber ET test
Other
Lead sponsor
University of Pittsburgh
Other
Eligibility
3 Years to 70 Years
Enrollment
95 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2019
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 7, 2020 · Synced Jul 22, 2026, 6:07 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 Jul 22, 2026, 6:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effectiveness of a Butyrate Formulation and Butyrate + Polyphenol Formulation on Gut Health, Permeability and Associated Symptoms

NCT06419231
View directory record Official record
Conditions
Gut Health
Interventions
Butyrate Formulation, Butyrate + Polyphenol Formulation, Placebo
Dietary Supplement
Lead sponsor
Supplement Formulators, Inc.
Industry
Eligibility
21 Years to 70 Years
Enrollment
143 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Fort Lauderdale, Florida
Source: ClinicalTrials.gov public record
Updated Jan 12, 2026 · Synced Jul 22, 2026, 6:07 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Hypoxia Blood Validation in Multiple Pulse Oximeters

NCT00881829
View directory record Official record
Conditions
Hypoxia
Interventions
Pulse Oximeter, Blood Pressure, Respiratory Rate, Respiratory Gasses, Temperature
Device
Lead sponsor
Clinimark, LLC
Other
Eligibility
18 Years to 50 Years
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2021
U.S. locations
1
States / cities
Louisville, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 25, 2021 · Synced Jul 22, 2026, 6:07 AM EDT
Completed Phase 1 Interventional

Cixutumumab, Everolimus, and Octreotide Acetate in Treating Patients With Advanced Low to Intermediate Grade Neuroendocrine Carcinoma

NCT01204476
View directory record Official record
Conditions
Gastrin-Producing Neuroendocrine Tumor, Lung Carcinoid Tumor, Metastatic Digestive System Neuroendocrine Tumor G1, Pancreatic Glucagonoma, Pancreatic Insulinoma, Pancreatic Polypeptide Tumor, Paraganglioma, Recurrent Digestive System Neuroendocrine Tumor G1, Recurrent Merkel Cell Carcinoma, Recurrent Pancreatic Neuroendocrine Carcinoma, Regional Digestive System Neuroendocrine Tumor G1, Somatostatin-Producing Neuroendocrine Tumor, Stage III Merkel Cell Carcinoma, Stage IV Merkel Cell Carcinoma, Thyroid Gland Medullary Carcinoma
Interventions
Cixutumumab, Everolimus, Laboratory Biomarker Analysis, Octreotide Acetate, Pharmacological Study
Biological · Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2010
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 14, 2016 · Synced Jul 22, 2026, 6:07 AM EDT
Recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

Use of Hyperpolarized Xenon Gas for Lung Imaging in Children and Adults

NCT02272049
View directory record Official record
Conditions
Respiratory Disorders
Interventions
Hyperpolarized 129 Xenon
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
6 Years and older
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2029
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Jul 22, 2026, 6:07 AM EDT
Not yet recruiting Not applicable Interventional

Amnioinfusion for Chorioamnionitis: Targeting Neonatal Brain Injury Biomarkers

NCT07610642
View directory record Official record
Conditions
Chorioamnionitis Affecting Fetus or Newborn, Amnioinfusion, Neonatal Brain Injury
Interventions
Intrauterine Pressure Catheter, Standard obstetric care at discretion of delivery provider
Device · Other
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 28, 2026 · Synced Jul 22, 2026, 6:07 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Prospective, Non-Randomized Evaluation of Carbon Dioxide Gas as a Contrast Agent in Comparison With Iodinated Contrast in Endovascular Aneurysm Repair

NCT00520416
View directory record Official record
Conditions
Carbon Dioxide, Endovascular Abdominal Aortic Aneurym Repair, Prospective, Angiogram
Interventions
Carbon dioxide angiogram
Procedure
Lead sponsor
University of Southern California
Other
Eligibility
Not listed
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 16, 2017 · Synced Jul 22, 2026, 6:07 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers Results available

Hyperpolarized Xenon-129 Magnetic Resonance Imaging and Spectroscopy of Brown Fat: Healthy Adult Volunteer Pilot Study

NCT02220426
View directory record Official record
Conditions
Obesity
Interventions
Xenon
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 60 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 24, 2025 · Synced Jul 22, 2026, 6:07 AM EDT
Completed Phase 2 Interventional Results available

Nitric Oxide Gas Inhalation in Severe Acute Respiratory Syndrome in COVID-19

NCT04306393
View directory record Official record
Conditions
SARS (Severe Acute Respiratory Syndrome), Coronavirus
Interventions
Nitric Oxide Gas
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 99 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
4
States / cities
Birmingham, Alabama • Shreveport, Louisiana • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 31, 2026 · Synced Jul 22, 2026, 6:07 AM EDT
Completed Not applicable Interventional Results available

A Study to Evaluate the Safety, Tolerability and Effectiveness of the Renew Insert in Treating Accidental Bowel Leakage

NCT01475474
View directory record Official record
Conditions
Bowel Incontinence
Interventions
Renew Insert
Device
Lead sponsor
Renew Medical
Industry
Eligibility
18 Years and older
Enrollment
97 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
3
States / cities
Los Gatos, California • San Diego, California • Weston, Florida
Source: ClinicalTrials.gov public record
Updated Nov 27, 2013 · Synced Jul 22, 2026, 6:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Hybrid SA RGP Center/S-H Skirt Daily Wear 90 Day Multicenter Study

NCT00804505
View directory record Official record
Conditions
Corneal Disease, Hypersensitivity
Interventions
SynergEyes Hybrid (petrafocon A hem-larafilcon A) Hybrid Contact Lens, SynergEyes Hybrid (paflufocon D hem-iberfilcon A) Contact Lens
Device
Lead sponsor
SynergEyes, Inc.
Industry
Eligibility
18 Years and older
Enrollment
98 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
8
States / cities
San Diego, California • Sunnyvale, California • Andover, Massachusetts + 5 more
Source: ClinicalTrials.gov public record
Updated Dec 22, 2009 · Synced Jul 22, 2026, 6:07 AM EDT
Recruiting Not applicable Interventional

Feasibility and Accuracy of a Novel Pleural Drain Gas Analyzer in Detecting Air Leaks

NCT06548386
View directory record Official record
Conditions
Air Leak From Lung, Pneumothorax
Interventions
Pleural gas analysis
Device
Lead sponsor
Lung Healing Technologies Inc
Industry
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Evanston, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 8, 2025 · Synced Jul 22, 2026, 6:07 AM EDT
Active, not recruiting No phase listed Observational

Analysis of Medial Clear Space Widening in Weber B Ankle Fractures

NCT07028944
View directory record Official record
Conditions
Weber B Ankle Fractures
Interventions
Gravity assisted stress, Manual external rotation stress, Weight-bearing stress
Other
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 90 Years
Enrollment
60 participants
Timeline
2023 – 2027
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 22, 2026 · Synced Jul 22, 2026, 6:07 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 Jul 22, 2026, 6:07 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Volatile Organic Compounds in Cystic Fibrosis

NCT01379040
View directory record Official record
Conditions
Cystic Fibrosis, Pseudomonas Aeruginosa
Interventions
Cystic Fibrosis patients
Other
Lead sponsor
Landon Pediatric Foundation
Other
Eligibility
1 Year to 40 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Ventura, California
Source: ClinicalTrials.gov public record
Updated Aug 12, 2014 · Synced Jul 22, 2026, 6:07 AM EDT
Completed No phase listed Observational

Psychological Concomitants of Morquio Syndrome (The MAP Study)

NCT01752296
View directory record Official record
Conditions
Morquio Disease, Mucopolysaccharidosis IV
Interventions
Not listed
Lead sponsor
Nadia Ali, PhD
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Decatur, Georgia
Source: ClinicalTrials.gov public record
Updated Dec 3, 2013 · Synced Jul 22, 2026, 6:07 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Oxitone Sp02 Hypoxia Test Versus Reference Pulse Oximetry

NCT02870179
View directory record Official record
Conditions
Hypoxia
Interventions
Pulse Oximeter
Device
Lead sponsor
Oxitone Medical Ltd.
Industry
Eligibility
18 Years to 50 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Louisville, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 19, 2017 · Synced Jul 22, 2026, 6:07 AM EDT
Not listed Not applicable Interventional

Comparison of the Atmo Motility Gas Capsule System to the Reference Standard

NCT05718505
View directory record Official record
Conditions
Gastroparesis, Slow Transit Constipation, IBS
Interventions
Atmo Motility Gas Capsule System, SmartPill Monitoring System
Device
Lead sponsor
Atmo Biosciences Pty Ltd
Industry
Eligibility
22 Years to 80 Years
Enrollment
209 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
2
States / cities
Boston, Massachusetts • Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 9, 2024 · Synced Jul 22, 2026, 6:07 AM EDT
Completed Not applicable Interventional Results available

The Effect of Glaucoma Drops on of the Duration of a Pure Intraocular Gas Bubble

NCT01843920
View directory record Official record
Conditions
Scleral Buckling
Interventions
Timolol-dorzolamide (Glaucoma drops), standard post-operative topical drops
Drug
Lead sponsor
Jason Hsu, MD
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 29, 2018 · Synced Jul 22, 2026, 6:07 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Curcumin (Tumeric) in the Treatment of Irritable Bowel Syndrome: A Randomized-Controlled Trial

NCT00779493
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
curcumin, placebo
Dietary Supplement
Lead sponsor
Kaiser Permanente
Other
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 10, 2015 · Synced Jul 22, 2026, 6:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Study of Airflow in the Lungs Using Helium MRI

NCT02154568
View directory record Official record
Conditions
COPD, Healthy, Constrictive Bronchitis
Interventions
hyperpolarized helium-3 gas with MRI of the chest
Drug
Lead sponsor
University of Virginia
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2026
U.S. locations
2
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Jul 22, 2026, 6:07 AM EDT
Not listed No phase listed Observational

Gas Exchange for Predicting Hospital Heart Failure Readmissions

NCT01960218
View directory record Official record
Conditions
Acute Decompensated Heart Failure
Interventions
Not listed
Lead sponsor
Shape Medical Systems, Inc.
Industry
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
7
States / cities
Washington D.C., District of Columbia • Champaign, Illinois • Boston, Massachusetts + 4 more
Source: ClinicalTrials.gov public record
Updated Apr 3, 2014 · Synced Jul 22, 2026, 6:07 AM EDT
Completed Not applicable Interventional

Test of Excessive Anesthetic Fresh Gas Flow Alerting in the Electronic Medical Record to Reduce Excessive Fresh Gas Flow

NCT06138626
View directory record Official record
Conditions
Anesthesia
Interventions
Alert
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
Not listed
Enrollment
336 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Apr 22, 2026 · Synced Jul 22, 2026, 6:07 AM EDT