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ClinicalTrials.gov public records Last synced Sep 7, 2026, 7:53 AM EDT

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Showing 1–24 of 57 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Inspiratory oxygen fraction Clear all
Recruiting Not applicable Interventional Accepts healthy volunteers

Targeting Breathing Limitations to Improve Functional Outcomes in HFpEF

NCT05723679
View directory record Official record
Conditions
Heart Failure With Preserved Ejection Fraction, Obesity
Interventions
HeO2 gas mixture, Room air gas mixture
Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
55 Years to 90 Years
Enrollment
78 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2029
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated May 6, 2026 · Synced Sep 7, 2026, 7:53 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Pre-oxygenation With Real Time End-tidal Oxygen Measurements Versus Single Breath Measurements

NCT03840486
View directory record Official record
Conditions
Rapid Sequence Intubation
Interventions
Non-rebreather mask (NRBM), Non-invasive ventilator mask (NIV), Nasal cannula EtO2 sensor, Oxygen (NRBM), Oxygen (NIV)
Device · Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 12, 2025 · Synced Sep 7, 2026, 7:53 AM EDT
Completed Not applicable Interventional

Motor Plasticity, Intermittent Hypoxia and Sleep Apnea

NCT04017767
View directory record Official record
Conditions
Sleep Apnea, Obstructive, Spinal Cord Injuries, Hypoxia
Interventions
Induced Acute Intermittent Hypoxia (AIH), AIH mask
Procedure · Device
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Sep 7, 2025 · Synced Sep 7, 2026, 7:53 AM 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 12, 2026 · Synced Sep 7, 2026, 7:53 AM EDT
Completed Not applicable Interventional

Reducing Reintubation Risk in High-Risk Cardiac Surgery Patients With High-Flow Nasal Cannula

NCT04782817
View directory record Official record
Conditions
Intubation, Cardiovascular Surgical Procedure
Interventions
Recommendation for high flow nasal cannula oxygen therapy order set, Provider choice standard care order set
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
3,568 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 19, 2026 · Synced Sep 7, 2026, 7:53 AM EDT
Completed Not applicable Interventional

Late Permissive Hypercapnia for Intubated and Ventilated Preterm Infants

NCT02799875
View directory record Official record
Conditions
Premature Neonate
Interventions
Higher permissive hypercapnia, Lower Permissive Hypercapnia
Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
7 Days to 14 Days
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2021
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated May 2, 2021 · Synced Sep 7, 2026, 7:53 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Breathing Mild Bouts of Low Oxygen on Limb Mobility After Spinal Injury

NCT02323945
View directory record Official record
Conditions
Spinal Cord Injuries
Interventions
AIH, Walk, Strength
Other
Lead sponsor
Spaulding Rehabilitation Hospital
Other
Eligibility
18 Years to 75 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2027
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 19, 2026 · Synced Sep 7, 2026, 7:53 AM EDT
Not listed No phase listed Observational

Intraoperative Hyperoxia and MINS

NCT04540276
View directory record Official record
Conditions
Hyperoxia, Myocardial Infarction, Myocardial Injury
Interventions
Inspiratory oxygen fraction
Drug
Lead sponsor
University Hospital Bispebjerg and Frederiksberg
Other
Eligibility
18 Years and older
Enrollment
7,700 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 3, 2021 · Synced Sep 7, 2026, 7:53 AM EDT
Withdrawn Not applicable Interventional

Intra-operative Fraction of Inspired Oxygen and Lung Injury in Coronary Artery Bypass Grafting Surgery

NCT04115501
View directory record Official record
Conditions
Lung Injury, Pulmonary Complication
Interventions
Fraction of Inspired Oxygen
Other
Lead sponsor
University of Louisville
Other
Eligibility
18 Years to 75 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Feb 14, 2024 · Synced Sep 7, 2026, 7:53 AM EDT
Completed No phase listed Observational

Correlation of PaCO2 to the Inspired and Expired Oxygen Gradient

NCT01513213
View directory record Official record
Conditions
Neurosurgery
Interventions
Not listed
Lead sponsor
Swedish Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 23, 2017 · Synced Sep 7, 2026, 7:53 AM EDT
Completed Not applicable Interventional Results available

Targeting Normoxia in Neonates With Cyanotic Congenital Heart Disease in the Intra-operative and Immediate Post-operative Period

NCT04452188
View directory record Official record
Conditions
Hypoplastic Left Heart Syndrome, Total Anomalous Pulmonary Venous Return, Truncus Arteriosus, Pulmonary Atresia With Ventricular Septal Defect, Transposition of the Great Arteries, Double Outlet Right Ventricle, Subpulmonary VSD, Tetralogy of Fallot, Double Outlet Right Ventricle With Subaortic Ventricular Septal Defect and Pulmonary Stenosis, Cardiopulmonary Bypass
Interventions
Normoxia (with controlled re-oxygenation), Standard of care ventilation
Other
Lead sponsor
University of Michigan
Other
Eligibility
Up to 29 Days
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 17, 2024 · Synced Sep 7, 2026, 7:53 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Prolonged Hypoxic Breathing in Healthy Volunteers: a Safety Study

NCT02860975
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Inhaled Nitrogen
Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 40 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 26, 2026 · Synced Sep 7, 2026, 7:53 AM 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 18, 2019 · Synced Sep 7, 2026, 7:53 AM EDT
Completed Phase 2Phase 3 Interventional Results available

Risk of Oxygen During Cardiac Surgery Trial

NCT02361944
View directory record Official record
Conditions
Cardiac Surgery
Interventions
Oxygen - normoxia, Oxygen - hyperoxia
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years and older
Enrollment
213 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 31, 2024 · Synced Sep 7, 2026, 7:53 AM EDT
Terminated Not applicable Interventional Results available

Pairing Intermittent Hypoxia and Transcutaneous Electrical Spinal Cord Stimulation to Promote Arm Use After Cervical SCI

NCT04854057
View directory record Official record
Conditions
Spinal Cord Injuries
Interventions
AIH - Intermittent Hypoxia - hypoxia air mixture, SHAM - Intermittent Room Air - room air mixture, TESS - Transcutaneous Electrical Spinal Cord Stimulation + Functional Task Practice
Other · Device
Lead sponsor
Spaulding Rehabilitation Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 9, 2024 · Synced Sep 7, 2026, 7:53 AM EDT
Completed Phase 4 Interventional Results available

Aerosolized Endotracheal Lidocaine to Avoid Intracranial Pressure Spikes in Patients With Severe Traumatic Brain Injury

NCT05058677
View directory record Official record
Conditions
Traumatic Brain Injury
Interventions
aerosolized 2% lidocaine (20mg/ml), instilled 0.9% sodium chloride (NS), instilled 2% lidocaine solution, Endotracheal Suctioning (ETS)
Drug · Procedure
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
Up to 16 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 6, 2026 · Synced Sep 7, 2026, 7:53 AM EDT
Terminated Not applicable Interventional

Mechanical Ventilation in Severe Brain Injury: The Effect of Positive End Expiratory Pressure on Intracranial Pressure

NCT02680704
View directory record Official record
Conditions
Intracranial Hypertension, Critical Illness, Brain Injuries, Lung Injury, Respiratory Failure, Positive-Pressure Respiration, Intrinsic
Interventions
PEEP titrated mechanical ventilation
Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 21, 2019 · Synced Sep 7, 2026, 7:53 AM EDT
Completed Not applicable Interventional Results available

Ventilation Strategies, Anesthetic Techniques and Cerebral Oxygenation in the Beach Chair Position

NCT01535274
View directory record Official record
Conditions
Stroke
Interventions
Inspired oxygen fraction / end tidal carbon dioxide
Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 85 Years
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 5, 2022 · Synced Sep 7, 2026, 7:53 AM EDT
Completed Not applicable Interventional Results available

Inhaled Nitric Oxide (iNO) as an Adjunct to Neonatal Resuscitation

NCT01220687
View directory record Official record
Conditions
Respiratory Distress Syndrome in Premature Infants, Very Low Birth Weight Baby
Interventions
iNO, Nitrogen
Drug · Other
Lead sponsor
University of Oklahoma
Other
Eligibility
1 Minute to 2 Minutes
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
2
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Aug 18, 2020 · Synced Sep 7, 2026, 7:53 AM EDT
Completed Not applicable Interventional

Impact of High Versus Lower Oxygen Fraction Prior to Extubation on Postoperative Pulmonary Atelectasis Measured With EIT

NCT06538740
View directory record Official record
Conditions
Atelectasis
Interventions
Ventilating the patient with lower (40 or 70%) oxygen concentration during the wash out phase, before extubation
Procedure
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 24, 2025 · Synced Sep 7, 2026, 7:53 AM EDT
Withdrawn Not applicable Interventional

Pulmonary Vascular Effects of Respiratory Rate & Carbon Dioxide

NCT01927237
View directory record Official record
Conditions
Low Tidal Volume Ventilation, Acute Respiratory Distress Syndrome
Interventions
HLR, EHR
Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 99 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 26, 2017 · Synced Sep 7, 2026, 7:53 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Prospective Observation of Exercise Parameters in Advanced Heart Failure

NCT01210573
View directory record Official record
Conditions
Advanced Heart Failure
Interventions
adjustment of LVAD or pacemaker
Device
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 17, 2014 · Synced Sep 7, 2026, 7:53 AM EDT
Completed Not applicable Interventional

Adaptive Support Ventilation in Acute Respiratory Distress Syndrome

NCT03715751
View directory record Official record
Conditions
Acute Respiratory Distress Syndrome
Interventions
ASV, Lung Protective Ventilation
Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 7, 2022 · Synced Sep 7, 2026, 7:53 AM EDT
Completed Not applicable Interventional

The ECMO-Free Trial

NCT05486559
View directory record Official record
Conditions
Extracorporeal Membrane Oxygenation Complication
Interventions
ECMO-free protocol, Usual Care
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
225 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
7
States / cities
San Diego, California • Stanford, California • Minneapolis, Minnesota + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Sep 7, 2026, 7:53 AM EDT