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ClinicalTrials.gov public records Last synced Sep 16, 2026, 8:03 PM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Intervention: CO2 Clear all
Completed Phase 2 Interventional

The Effect of Nasal Carbon Dioxide (CO2) in the Symptomatic Treatment of Seasonal Allergic Rhinitis

NCT00917111
View directory record Official record
Conditions
Seasonal Allergic Rhinitis
Interventions
Nasal CO2, Inactive Placebo Gas
Drug
Lead sponsor
Capnia, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Aug 14, 2012 · Synced Sep 16, 2026, 8:03 PM EDT
Completed Not applicable Interventional Results available

Improved Patient Recovery After Anesthesia With Hypercapnia Hyperpnoea

NCT00708526
View directory record Official record
Conditions
Hypercapnia
Interventions
standard of care for phase one anesthesia care, Quick Emergence Device
Other · Device
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Nov 28, 2022 · Synced Sep 16, 2026, 8:03 PM EDT
Not listed Early Phase 1 Interventional

Use of cSVF Via IV Deployment for Residual Lung Damage After Symptomatic COVID-19 Infection

NCT04326036
View directory record Official record
Conditions
Pulmonary Alveolar Proteinosis, COPD, Idiopathic Pulmonary Fibrosis, Viral Pneumonia, Coronavirus Infection, Interstitial Lung Disease
Interventions
Microcannula Harvest Adipose Derived tissue stromal vascular fraction (tSVF), Centricyte 1000, IV Deployment Of cSVF In Sterile Normal Saline IV Solution, Liberase Enzyme (Roche), Sterile Normal Saline for Intravenous Use
Procedure · Device · Drug
Lead sponsor
Black Tie Medical, Inc.
Industry
Eligibility
18 Years to 90 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Stevensville, Montana
Source: ClinicalTrials.gov public record
Updated Feb 21, 2023 · Synced Sep 16, 2026, 8:03 PM EDT
Completed Phase 2 Interventional Results available

Intraoperative Amiodarone to Prevent Atrial Fibrillation in Lung Transplant Patients

NCT03221764
View directory record Official record
Conditions
Atrial Fibrillation, Lung Transplant; Complications
Interventions
Amiodarone with CoSeal, CO2 driver
Drug · Device
Lead sponsor
University of Louisville
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Jun 28, 2020 · Synced Sep 16, 2026, 8:03 PM EDT
Terminated Not applicable Interventional Results available

Treatment of Field Cancerization for Reduction in Tumor Burden - A Prospective Study

NCT02150863
View directory record Official record
Conditions
Extensive Photodamage, Actinic Keratosis, History of Numerous Skin Cancers
Interventions
Ultrapulse Carbon Dioxide Laser, Cellutome epidermal harvesting system
Device
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 85 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 17, 2019 · Synced Sep 16, 2026, 8:03 PM EDT
Completed No phase listed Observational

Assessing Whole-body Metabolism in Gynecologic Cancers in Response to a Single Chemotherapy Cycle and/ or Immunotherapy

NCT07393633
View directory record Official record
Conditions
Gynecologic Cancers
Interventions
Not listed
Lead sponsor
University of Tennessee Graduate School of Medicine
Other
Eligibility
18 Years and older · Female only
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Knoxville, Tennessee
Source: ClinicalTrials.gov public record
Updated Feb 9, 2026 · Synced Sep 16, 2026, 8:03 PM EDT
Withdrawn Not applicable Interventional

High Flow Therapy (HFT) to Treat Respiratory Insufficiency in Chronic Obstructive Pulmonary Disease (COPD)

NCT00990119
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive, Respiratory Insufficiency
Interventions
Vapotherm High Flow Therapy, Non-invasive positive pressure ventilation
Device
Lead sponsor
Vapotherm, Inc.
Industry
Eligibility
50 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 15, 2020 · Synced Sep 16, 2026, 8:03 PM EDT
Recruiting Not applicable Interventional

Short Title: Standard vs. Lower Pressure Pneumoperitoneum

NCT06338865
View directory record Official record
Conditions
Laparoscopic Surgery
Interventions
Carbon dioxide, Bupivacaine, Oxycodone
Other · Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
294 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 9, 2024 · Synced Sep 16, 2026, 8:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Comparison of Lasers in the Treatment of Scars

NCT02988622
View directory record Official record
Conditions
Scar
Interventions
Fraxel Laser, CO2 Laser
Device
Lead sponsor
Marta Hemmingson-Van Beek
Other
Eligibility
18 Years to 120 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Oct 17, 2018 · Synced Sep 16, 2026, 8:03 PM EDT
Recruiting Not applicable Interventional

Mild Intermittent Hypoxia: A Prophylactic for Autonomic Dysfunction in Individuals With Spinal Cord Injuries

NCT05351827
View directory record Official record
Conditions
Spinal Cord Injuries, Autonomic Dysreflexia
Interventions
Mild Intermittent Hypoxia, Sham
Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 60 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Sep 16, 2026, 8:03 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 14, 2019 · Synced Sep 16, 2026, 8:03 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Fractional Laser vs. Ultrasound for Periorbital Wrinkles

NCT01529983
View directory record Official record
Conditions
Wrinkles
Interventions
Laser treatment, High-intensity focused ultrasound
Procedure · Device
Lead sponsor
Northwestern University
Other
Eligibility
35 Years to 60 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2024
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Sep 16, 2026, 8:03 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Chemoreflex and Baroreflex Alterations Causing Postural Tachycardia Syndrome With Orthostatic Hyperpnea and Hypocapnia

NCT05923840
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome, Hypocapnia, Hyperventilation
Interventions
Chemoreflex Testing, Baroreflex testing, Orthostatic stress testing
Diagnostic Test
Lead sponsor
New York Medical College
Other
Eligibility
15 Years to 39 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Hawthorne, New York
Source: ClinicalTrials.gov public record
Updated Jun 27, 2023 · Synced Sep 16, 2026, 8:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Clinical Evidence of pH Dependent ß2 Adrenergic Transport Mechanisms in the Airway

NCT01216748
View directory record Official record
Conditions
Healthy Volunteers
Interventions
quiet breathing, Hypocapnic Hyperventilation, Hypercapnic Hyperventilation, eucapnic hyperventilation
Other
Lead sponsor
University of Miami
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated May 26, 2016 · Synced Sep 16, 2026, 8:03 PM EDT
Completed Not applicable Interventional

The Influence of Cardiorespiratory Fitness on Firefighter Cardiovascular Health Under Exercise Conditions

NCT04514354
View directory record Official record
Conditions
Cardiovascular Diseases, Post-Exercise Hypotension
Interventions
GEST
Behavioral
Lead sponsor
University of Connecticut
Other
Eligibility
21 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Hartford, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 13, 2020 · Synced Sep 16, 2026, 8:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Noninvasive Ventilation Masks Carbon Dioxide Clearance in Normal Volunteers

NCT03882723
View directory record Official record
Conditions
CO2 Clearance, Mask Comfort, Rebreathing Exhaled Gas
Interventions
Evaluated 4 masks used for NIV with mechanical ventilators
Device
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 27, 2023 · Synced Sep 16, 2026, 8:03 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Brain Health in Transgender Adults

NCT07624747
View directory record Official record
Conditions
Gender Dysphoria
Interventions
Magnetic Resonance Imaging, Cognition and Health Tests, Optional Exercise Test
Device · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 45 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Sep 16, 2026, 8:03 PM EDT
Withdrawn Not applicable Interventional

Warm and Humidified vs Cold and Dry Carbon Dioxide (CO2) Pneumoperitoneum

NCT03330067
View directory record Official record
Conditions
Pneumoperitoneum
Interventions
Cold and dry CO2 pneumoperitoneum, Warm and humidified CO2 pneumoperitoneum
Device
Lead sponsor
Northwell Health
Other
Eligibility
18 Years to 85 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 26, 2023 · Synced Sep 16, 2026, 8:03 PM EDT
Completed Phase 2 Interventional Results available

Abnormal Ventilatory Response to Carbon Dioxide: a Potential Biomarker for Seizure Induced Respiratory Depression & Modification by SSRI

NCT02929667
View directory record Official record
Conditions
Epilepsy, SUDEP
Interventions
Fluoxetine, Placebo
Drug
Lead sponsor
Rup Kamal Sainju
Other
Eligibility
18 Years to 75 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
2
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated May 3, 2020 · Synced Sep 16, 2026, 8:03 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Evaluation of Substance P Neurotransmission in Panic Disorder by PET Imaging of NK1 Receptors With [18F]SPA-RQ

NCT00088738
View directory record Official record
Conditions
Panic Disorder, Healthy
Interventions
[18F] SPA-RQ
Drug
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
18 Years to 65 Years
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 16, 2026, 8:03 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Exercise in Adolescents With Insulin Resistance

NCT04154865
View directory record Official record
Conditions
Insulin Resistance
Interventions
Hypercapnia, Transcranial Doppler, Cycle ergometer, Cognitive Tests
Other · Device
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
12 Years to 18 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 2, 2024 · Synced Sep 16, 2026, 8:03 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Brain Blood Flow: Age and Gender

NCT02840851
View directory record Official record
Conditions
Healthy, Aging
Interventions
MRI, TCD
Device
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
20 Years to 64 Years
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 8, 2019 · Synced Sep 16, 2026, 8:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pharmacokinetics and Pharmacodynamics of Nicotine With Use of Standardized Research Electronic Cigarette (SREC)

NCT05658471
View directory record Official record
Conditions
Nicotine Dependence, Tobacco Toxicity, Cardiovascular Risk Factors
Interventions
Standardized Research E-Cigarette (SREC), Over the Counter E-Cigarette (EC), Biological Samples, Smoking-related Questionnaires
Other · Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
21 Years to 70 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 26, 2026 · Synced Sep 16, 2026, 8:03 PM 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 16, 2026, 8:03 PM EDT