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Showing 1–24 of 141 matching trials from the live ClinicalTrials.gov search.
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Active, not recruiting Not applicable Interventional

Stress Management Program

NCT06526585
View directory record Official record
Conditions
Stress, Anxiety
Interventions
Cyclic Sighing Breathing, Box Breathing, Hypnosis, Audiobook
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Sep 20, 2026, 5:28 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

ChroniSense Polso Wrist Worn Respiration Rate Validation Study

NCT03750344
View directory record Official record
Conditions
Respiratory Rate
Interventions
Diagnostic test
Device
Lead sponsor
ChroniSense Medical Ltd.
Industry
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Louisville, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 4, 2019 · Synced Sep 20, 2026, 5:28 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Predictors of Opioid-Induced Respiratory Depression (OIRD)

NCT02473354
View directory record Official record
Conditions
Respiratory Depression
Interventions
Remifentanil, Oxygen, Carbon dioxide
Drug
Lead sponsor
Duke University
Other
Eligibility
18 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 9, 2020 · Synced Sep 20, 2026, 5:28 AM EDT
Recruiting Not applicable Interventional

End-Tidal Oxygen for Intubation in the Emergency Department

NCT06578468
View directory record Official record
Conditions
Critical Illness, Hypoxia, Respiratory Failure
Interventions
End-tidal oxygen monitor
Device
Lead sponsor
Sydney Local Health District
Government
Eligibility
18 Years and older
Enrollment
1,400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
3
States / cities
Minneapolis, Minnesota • Albuquerque, New Mexico • The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Sep 20, 2026, 5:28 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effect of Raised End-Tidal pCo2 on Choroidal Volume

NCT06275308
View directory record Official record
Conditions
Intraocular Pressure
Interventions
Ventilation manipulation
Other
Lead sponsor
University of Pittsburgh
Other
Eligibility
Up to 8 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 8, 2026 · Synced Sep 20, 2026, 5:28 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Blood Brain Flow and Exercise

NCT02653638
View directory record Official record
Conditions
Cerebrovascular Circulation
Interventions
Control, Indomethacin
Other · Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 75 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 17, 2019 · Synced Sep 20, 2026, 5:28 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Psychophysiological Effects of Controlled Respiration and Mindfulness

NCT05304000
View directory record Official record
Conditions
Stress, Physiological, Stress, Emotional, Insomnia
Interventions
Mindfulness Meditation, Cyclic Sighing Breathing, Box Breathing, Cyclic Hyperventilation with Retention
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
108 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
2
States / cities
Palo Alto, California • Stanford, California
Source: ClinicalTrials.gov public record
Updated May 5, 2022 · Synced Sep 20, 2026, 5:28 AM EDT
Completed Not applicable Interventional

Comparison of Two-hand Mask Ventilation Technique: Standard V-E Versus Reversal V-E Technique

NCT03170037
View directory record Official record
Conditions
Intubation
Interventions
Standard V-E ventilation technique, Reversal V-E ventilation technique
Procedure
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 16, 2017 · Synced Sep 20, 2026, 5:28 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Exercise and Carotid Artery Function in Metabolic Syndrome

NCT07430839
View directory record Official record
Conditions
Metabolic Syndrome
Interventions
exercise, Diagnostics, Inhaled CO2-mixed air
Behavioral · Diagnostic Test · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 40 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 24, 2026 · Synced Sep 20, 2026, 5:28 AM EDT
Completed Early Phase 1 Interventional

Effect of Opioids on Central Control of Ventilation in Children With Obstructive Sleep Apnea

NCT05051189
View directory record Official record
Conditions
OSA, Opioid, Adenotonsillectomy
Interventions
Fentanyl Citrate
Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
2 Years to 8 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 5, 2025 · Synced Sep 20, 2026, 5:28 AM EDT
Completed No phase listed Observational

Validation of a Novel Oxygen Consumption Measurement Technique in Neonates

NCT03154112
View directory record Official record
Conditions
Neonatal Respiratory Failure, Congenital Heart Defect
Interventions
Measurement of oxygen consumption and caloric expenditure
Device
Lead sponsor
Boston Children's Hospital
Other
Eligibility
Up to 12 Months
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 11, 2020 · Synced Sep 20, 2026, 5:28 AM EDT
Completed Not applicable Interventional Results available

Correlating Brain Tissue Oxygen and Regional Cerebral Oximetry

NCT03128957
View directory record Official record
Conditions
Stroke
Interventions
IVOS cerebral oximeter, Licox cerebral oxygenation monitor, Cerebral oxygenation
Device · Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Aug 31, 2022 · Synced Sep 20, 2026, 5:28 AM EDT
Recruiting Not applicable Interventional

Non-invasive Treatment for Long COVID (Post COVID-19 Condition) Brain Fog

NCT06614309
View directory record Official record
Conditions
Long COVID
Interventions
Acute Placebo Visit, Acute Progressive Carbon Dioxide, Acute Intermittent Hypoxia, Training: Progressive Carbon Dioxide Ramping, Training: Intermittent Hypoxic Exposure, Training: Placebo Control
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Sep 20, 2026, 5:28 AM EDT
Active, not recruiting Not applicable Interventional

Pedi-Cap CO2 Detector for Face-mask Ventilation in the Delivery Room

NCT06258187
View directory record Official record
Conditions
Neonatal Resuscitation, Neonatal Disease
Interventions
Pedi-Cap
Device
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
30 Weeks and older
Enrollment
632 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Mar 1, 2026 · Synced Sep 20, 2026, 5:28 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Pulse Oximeter Accuracy During Stable Hypoxia Plateaus

NCT07408388
View directory record Official record
Conditions
Hypoxia
Interventions
Pulse Oximeter, Induced hypoxia through breathing nitrogen-air-carbon dioxide mixture
Device · Procedure
Lead sponsor
Nihon Kohden
Industry
Eligibility
18 Years to 50 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Sep 20, 2026, 5:28 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Effect of Mode of Transport Ventilation on Respiratory Parameters After Cardiac Surgery

NCT02740075
View directory record Official record
Conditions
Complication of Ventilation Therapy
Interventions
Not listed
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jul 23, 2019 · Synced Sep 20, 2026, 5:28 AM EDT
Terminated No phase listed Observational

CO2 Inhalation and Risk for Panic Disorder

NCT00930657
View directory record Official record
Conditions
Panic Disorder
Interventions
Not listed
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
9 Years to 20 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 13, 2019 · Synced Sep 20, 2026, 5:28 AM EDT
Completed Not applicable Interventional

A Noninvasive Multimodal Biosensing Device for Screening and Monitoring Response to Treatment of Infectious Respiratory Diseases

NCT05035420
View directory record Official record
Conditions
COVID-19, Upper Respiratory Infection, Lower Respiratory Infection
Interventions
Fitbit, Douglas Bag, Periflux 6000 EPOS, BIOPAC, Flowmet, NIRS
Device
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
18 Years to 78 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 4, 2025 · Synced Sep 20, 2026, 5:28 AM EDT
Completed No phase listed Observational

Usefulness of Cardiopulmonary Exercise Testing for Cardiovascular Risk Estimation and Frailty Assessment in Liver Transplant Candidates

NCT04543825
View directory record Official record
Conditions
Cardiovascular Diseases+Liver Transplantation
Interventions
Cardiopulmonary exercise testing
Device
Lead sponsor
Andres Duarte-Rojo
Other
Eligibility
45 Years to 75 Years
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
2
States / cities
Phoenix, Arizona • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 2, 2024 · Synced Sep 20, 2026, 5:28 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Wearing Masks on End-tidal Carbon Dioxide and Pulse Oximetry

NCT05114993
View directory record Official record
Conditions
Carbon Dioxide
Interventions
wearing a disposable surgical mask
Device
Lead sponsor
Patrick Brooks
Other
Eligibility
2 Years to 80 Years
Enrollment
119 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Springfield, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 23, 2022 · Synced Sep 20, 2026, 5:28 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 20, 2026, 5:28 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Brain Blood Vessel Responses to Changes in Blood Flow: Younger Cohort

NCT06629090
View directory record Official record
Conditions
Magnetic Resonance Imaging, Cerebrovascular Circulation
Interventions
MRI, Prazosin, Placebo
Device · Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
20 Years to 40 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jul 5, 2026 · Synced Sep 20, 2026, 5:28 AM EDT
Recruiting Not applicable Interventional

Pilot Feasibility Trial of the SafeLM Supraglottic Airway (SGA)

NCT05989880
View directory record Official record
Conditions
Anesthesia
Interventions
SafeLM as a supraglottic airway device with video capability, SafeLM as a supraglottic airway device without video capability, SafeLM as a conduit for intubation using an endotracheal tube with video capability, SafeLM as a conduit for intubation using a bougie with video capability
Device
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 9, 2024 · Synced Sep 20, 2026, 5:28 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Combined Therapeutic Air Mixture and Electrical Stimulation to Improve Breathing and Hand Function in Spinal Cord Injury

NCT06101199
View directory record Official record
Conditions
Cervical Spinal Cord Injury
Interventions
Acute Intermittent Hypercapnic Hypoxia, Transcutaneous spinal cord stimulation, SHAM Acute Intermittent Hypercapnic Hypoxia, SHAM Transcutaneous spinal cord stimulation
Other
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years to 65 Years
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 16, 2025 · Synced Sep 20, 2026, 5:28 AM EDT