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ClinicalTrials.gov public records Last synced Oct 21, 2026, 5:31 PM EDT

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Showing 1–24 of 197 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Ambient air Clear all
Terminated Phase 1Phase 2 Interventional Results available

CO as a Stimulant for Mitochondrial Biogenesis in Human Cardiac Muscle

NCT01727167
View directory record Official record
Conditions
Cardiac Disease, Mitochondrial Biogenesis, Carbon Monoxide
Interventions
200ppm CO for one hour, Control
Drug · Other
Lead sponsor
John J Freiberger
Other
Eligibility
20 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated May 19, 2016 · Synced Oct 21, 2026, 5:31 PM EDT
Active, not recruiting Not applicable Interventional

Acute Intermittent Hypoxia on Leg Function Following Spinal Cord Injury

NCT02274116
View directory record Official record
Conditions
Spinal Cord Injuries
Interventions
SHAM - Intermittent Room Air - room air mixture, AIH - Intermittent Hypoxia - hypoxia air mixture
Other
Lead sponsor
Spaulding Rehabilitation Hospital
Other
Eligibility
18 Years to 75 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2027
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 20, 2026 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Not applicable Interventional

Mi-Helper Transnasal Cooling for Acute Treatment of Migraine

NCT06051604
View directory record Official record
Conditions
Episodic Migraine, Migraine With Aura, Migraine Without Aura, Migraine
Interventions
Mi-Helper
Device
Lead sponsor
CoolTech LLC
Industry
Eligibility
18 Years to 65 Years
Enrollment
172 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 26, 2024 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Melatonin on Sleep, Ventilatory Control and Cognition at Altitude

NCT03588676
View directory record Official record
Conditions
Intermittent Hypoxia
Interventions
Melatonin, Placebo
Other
Lead sponsor
Robert L. Owens
Other
Eligibility
18 Years to 65 Years
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Aug 14, 2019 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Non-invasive Tidal Volume Monitoring Using the Linshom Respiratory Monitoring Device

NCT03279458
View directory record Official record
Conditions
Pulmonary Ventilation, Capnography
Interventions
Linshom Respiratory Monitoring Device
Device
Lead sponsor
University of Mississippi Medical Center
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Jackson, Mississippi
Source: ClinicalTrials.gov public record
Updated Jul 5, 2018 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Measuring the Neurological Benefits of Intermittent Hypoxia Therapy With MRI

NCT05183113
View directory record Official record
Conditions
Spinal Cord Injuries
Interventions
Acute Intermittent Hypoxia
Other
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 60 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 28, 2023 · Synced Oct 21, 2026, 5:31 PM EDT
Terminated Not applicable Interventional Results available

Transnasal Cooling for Migraine

NCT04936061
View directory record Official record
Conditions
Migraine, Episodic Migraine, Migraine With Aura, Migraine Without Aura
Interventions
CoolStat active device, CoolStat sham device
Device
Lead sponsor
CoolTech LLC
Industry
Eligibility
18 Years to 80 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
3
States / cities
Scottsdale, Arizona • East Lansing, Michigan • Charlotte, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 29, 2023 · Synced Oct 21, 2026, 5:31 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, 5:31 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Mental Stress & Diesel Exhaust on Cardiovascular Health

NCT03467997
View directory record Official record
Conditions
Blood Pressure, Inflammation, Catecholamines
Interventions
Trier social stress test, Diesel exhaust
Behavioral · Other
Lead sponsor
University of Washington
Other
Eligibility
22 Years to 49 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Nov 5, 2018 · Synced Oct 21, 2026, 5:31 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Maternal Oxygen Supplementation for Intrauterine Resuscitation

NCT05681624
View directory record Official record
Conditions
Fetal Distress, Fetal Hypoxia, Labor and Delivery Complication
Interventions
Maternal oxygen supplementation, Room air
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
Female only
Enrollment
2,252 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 10, 2026 · Synced Oct 21, 2026, 5:31 PM EDT
Not yet recruiting No phase listed Observational Accepts healthy volunteers

Hand Perfusion and Pulse Oximetry Performance

NCT06925646
View directory record Official record
Conditions
Oxygen Saturation
Interventions
Finger hyperperfusion via adenosine, Finger hypoperfusion via by norepinephrine, Baseline hypoxic test
Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 13, 2026 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Responses to Exposure to Low Levels of Concentrated Ambient Particles in Healthy Young Adults

NCT03232086
View directory record Official record
Conditions
Exposure to Pollution
Interventions
Clean Air, PM2.5
Other
Lead sponsor
Environmental Protection Agency (EPA)
Federal
Eligibility
18 Years to 35 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 5, 2021 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Not applicable Interventional

Oxygen Savings With Administered Oxygen and High Flow Ambient Air At Rest

NCT04170062
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive, Lung Diseases, Interstitial, Pulmonary Fibrosis, Hypoxemia, Dyspnea, Oxygen Inhalation Therapy
Interventions
Nasal Delivery of High-Flow Air and Oxygen Therapy, Nasal Delivery of Oxygen Therapy
Device
Lead sponsor
Johns Hopkins University
Other
Eligibility
30 Years to 100 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
2
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 24, 2024 · Synced Oct 21, 2026, 5:31 PM EDT
Recruiting Phase 3 Interventional

Hyperbaric Oxygen Treatment for Veterans With Traumatic Brain Injury

NCT06581003
View directory record Official record
Conditions
Traumatic Brain Injury, Military Operations
Interventions
Oxygen 99.7 %, Oxygen 21 %
Drug
Lead sponsor
University of South Florida
Other
Eligibility
18 Years to 75 Years
Enrollment
420 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jul 15, 2026 · Synced Oct 21, 2026, 5:31 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, 5:31 PM EDT
Recruiting Phase 4 Interventional

Trial to Evaluate Cyclical Topical Wound Oxygen Therapy in the Treatment of Chronic Venous Leg Ulcers

NCT06754735
View directory record Official record
Conditions
Venous Leg Ulcer (VLU)
Interventions
Topical Wound Oxygen Therapy, Sham Control Topical Wound Oxygen
Device
Lead sponsor
AOTI Ltd.
Industry
Eligibility
18 Years and older
Enrollment
212 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 19, 2025 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Not applicable Interventional Results available

Duration of Continuous Positive Airway Pressure and Pulmonary Function Testing in Preterm Infants

NCT02249143
View directory record Official record
Conditions
Respiratory Distress Syndrome, Bronchopulmonary Dysplasia
Interventions
CPAP and room air
Device
Lead sponsor
Oregon Health and Science University
Other
Eligibility
Up to 1 Year
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Aug 29, 2019 · Synced Oct 21, 2026, 5:31 PM EDT
Terminated Not applicable Interventional

PAL to Improve Oral Feeding for Infants With Chronic Lung Disease

NCT05446389
View directory record Official record
Conditions
Chronic Lung Disease of Prematurity, Respiratory Distress Syndrome in Premature Infant, Bronchopulmonary Dysplasia, Preterm Birth
Interventions
Pacifier Activated Lullaby ®
Device
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
1 Day to 33 Weeks
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 9, 2025 · Synced Oct 21, 2026, 5:31 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Effects of Continuous Positive Airway Pressure on Peripheral Oxygen Saturation, Work of Breathing, and Exercise Tolerance at Altitude

NCT05971290
View directory record Official record
Conditions
Hypoxemia, Altitude Hypoxia
Interventions
Continuous positive airway pressure, Ambient air
Device
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 70 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 2, 2023 · Synced Oct 21, 2026, 5:31 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Comparison Air Versus Carbon Dioxide Insufflation in Single Balloon Anterograde Enteroscopy

NCT03811522
View directory record Official record
Conditions
Carbon Dioxide Insufflation, Anterograde Single Balloon Enteroscopy
Interventions
carbon dioxide insufflation, Air insufflation
Other
Lead sponsor
North Eastern Ohio Gastroenterology and Endoscopy center
Other
Eligibility
18 Years to 90 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Warren, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 15, 2019 · Synced Oct 21, 2026, 5:31 PM EDT
Terminated Not applicable Interventional

Normobaric Oxygen Therapy for Individuals With First-Episode Psychosis

NCT04368039
View directory record Official record
Conditions
Psychosis, Schizophrenia, First-episode Psychosis
Interventions
Normobaric Oxygen, Placebo
Device
Lead sponsor
Nicholas Breitborde
Other
Eligibility
15 Years to 35 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Improving Human Cerebrovascular Function Using Acute Intermittent Hypoxia

NCT05164705
View directory record Official record
Conditions
Healthy Brain Perfusion
Interventions
Acute Intermittent Hypoxia, Sham Acute Intermittent Hypoxia
Other
Lead sponsor
Northwestern University
Other
Eligibility
21 Years to 50 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Oct 21, 2026, 5:31 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, 5:31 PM EDT
Active, not recruiting Not applicable Interventional

A Multi-Center Clinical Trial in Individuals With Spinal Cord Injury

NCT03644277
View directory record Official record
Conditions
Spinal Cord Injuries
Interventions
Acute Intermitted Hypoxia, Massed Practise, Rapael Glove
Other · Procedure
Lead sponsor
Shirley Ryan AbilityLab
Other
Eligibility
18 Years to 75 Years
Enrollment
121 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2026
U.S. locations
3
States / cities
Chicago, Illinois • East Hanover, New Jersey
Source: ClinicalTrials.gov public record
Updated Jul 24, 2025 · Synced Oct 21, 2026, 5:31 PM EDT