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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Carbon Monoxide Clear all
Completed Phase 1 Interventional Accepts healthy volunteers

Effects of Carbon Monoxide Breathing on Blood Vessel Function

NCT03067701
View directory record Official record
Conditions
Endothelial Dysfunction
Interventions
Carbon Monoxide
Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years to 39 Years
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 31, 2019 · Synced Sep 26, 2026, 6:09 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Comparison of Smoking and Vaping in Families

NCT02500238
View directory record Official record
Conditions
Smoking
Interventions
Saliva sample, Urine Sample, Toe nail clippings, Breath carbon monoxide test
Other
Lead sponsor
University of Florida
Other
Eligibility
6 Years to 17 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
2
States / cities
Gainesville, Florida • Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Dec 27, 2018 · Synced Sep 26, 2026, 6:09 AM EDT
Withdrawn No phase listed Observational

Exhaled Carbon Monoxide as a Marker of Hemolysis in Sickle Cell Disease- an Exploratory Study

NCT01888614
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
Not listed
Lead sponsor
University Hospitals Cleveland Medical Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 22, 2016 · Synced Sep 26, 2026, 6:09 AM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

E-Cigarette and Cigarette Nicotine Delivery and Abuse Liability in Cigarette Smokers and Dual Users

NCT03943706
View directory record Official record
Conditions
Tobacco Use
Interventions
Not listed
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 50 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Dec 18, 2020 · Synced Sep 26, 2026, 6:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Study of Novel Smoking Cessation Interventions in Current and Former Injection Drug Users

NCT01334736
View directory record Official record
Conditions
Tobacco Dependence
Interventions
Usual care, Lung age, Contingency Management, Lung age + Contingency Management
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 21, 2017 · Synced Sep 26, 2026, 6:09 AM EDT
Active, not recruiting Early Phase 1 Interventional Accepts healthy volunteers

Smoking Cessation Intervention During Low Dose CT (LDCT) Screening for Lung Cancer

NCT03059940
View directory record Official record
Conditions
Smoking Cessation
Interventions
Questionnaires, Low Dose Computed Tomography Scan, Shared Decision Making + Video, Cessation Counseling, Quitline, Pharmacotherapy Discussion, Nicotine Patch, Anti-Smoking Drug, Tobacco Treatment Program, Carbon Monoxide (CO) Level Test
Behavioral · Procedure · Other + 1 more
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
50 Years and older
Enrollment
630 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 14, 2026 · Synced Sep 26, 2026, 6:09 AM EDT
Completed Phase 2 Interventional

Hyperbaric Oxygen for Traumatic and Non-traumatic Brain Injury

NCT01986205
View directory record Official record
Conditions
Brain Injury, Chronic
Interventions
Hyperbaric Oxygen, Minimal pressure air
Combination Product
Lead sponsor
Lindell Weaver
Other
Eligibility
18 Years to 70 Years
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
2
States / cities
Murray, Utah • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Aug 3, 2022 · Synced Sep 26, 2026, 6:09 AM EDT
Not listed Not applicable Interventional

Smoking Cessation for People Living With HIV/AIDS

NCT01965405
View directory record Official record
Conditions
HIV, AIDS, Nicotine Dependence
Interventions
Bupropion, Brief Counseling, High-magnitude prize contingency management, Monitored support to quit smoking, No additional treatment, Prize contingency management for abstinence, Low intensity prize contingency management
Drug · Behavioral
Lead sponsor
Wayne State University
Other
Eligibility
18 Years to 80 Years
Enrollment
165 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2021
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 1, 2021 · Synced Sep 26, 2026, 6:09 AM EDT
Active, not recruiting No phase listed Observational

Characterizing Sleep Among Long-term Survivors of Childhood Cancer

NCT05480904
View directory record Official record
Conditions
ALL, Adult, CNS Tumor, Solid Tumor
Interventions
Neurocognitive (Thinking) Testing, CNS Vital Signs (Thinking) Testing, Health Questionnaires, Sleep Surveys & Sleep Diary, Echocardiography/EKG, Pulmonary Function, Remote Polysomnography, Physical Function
Other · Diagnostic Test · Device
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
18 Years and older
Enrollment
199 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Sep 26, 2026, 6:09 AM EDT
Completed No phase listed Observational

Suspected Cases of Carbon Monoxide Poisoning

NCT02950701
View directory record Official record
Conditions
Carbon Monoxide Intoxication
Interventions
Observational data collection.
Device
Lead sponsor
Nonin Medical, Inc
Industry
Eligibility
18 Years and older
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 25, 2018 · Synced Sep 26, 2026, 6:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Utilizing Exhaled Breathe Condensate Collection to Study Ion Regulation in Cystic Fibrosis

NCT01880723
View directory record Official record
Conditions
Cystic Fibrosis, Healthy
Interventions
Albuterol, Placebo saline
Drug
Lead sponsor
University of Arizona
Other
Eligibility
15 Years to 55 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2013
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Nov 28, 2023 · Synced Sep 26, 2026, 6:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Carbon Monoxide Monitor for the Measurement of End-Tidal Carbon Monoxide Levels in Children With or Without Hemolysis

NCT01848691
View directory record Official record
Conditions
Sickle Cell Anemia
Interventions
Measurement of carbon monoxide level in exhaled breath
Other
Lead sponsor
Ashutosh Lal
Other
Eligibility
5 Years to 14 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Oakland, California
Source: ClinicalTrials.gov public record
Updated Jun 1, 2014 · Synced Sep 26, 2026, 6:09 AM EDT
Completed No phase listed Observational

Prospective Evaluation of Biomarker Profiles in Idiopathic Pulmonary Fibrosis

NCT02151435
View directory record Official record
Conditions
IPF
Interventions
Not listed
Lead sponsor
University of Michigan
Other
Eligibility
35 Years to 80 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 25, 2017 · Synced Sep 26, 2026, 6:09 AM EDT
Recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

Hyperpolarized Xenon-129 MR Imaging of the Lung

NCT04662658
View directory record Official record
Conditions
E-Cig Use
Interventions
Hyperpolarized Xenon -129 MRI
Drug
Lead sponsor
University of Virginia
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Dec 9, 2020 · Synced Sep 26, 2026, 6:09 AM EDT
Completed Phase 2 Interventional

Contingency Management for Smoking in Substance Abusers

NCT00683033
View directory record Official record
Conditions
Cigarette Smoking
Interventions
Contingency Management, Brief smoking cessation counseling
Behavioral
Lead sponsor
UConn Health
Other
Eligibility
18 Years and older
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Farmington, Connecticut
Source: ClinicalTrials.gov public record
Updated Nov 20, 2011 · Synced Sep 26, 2026, 6:09 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Neural, Behavioral and Physiological Correlates of Feeding in Humans

NCT01665560
View directory record Official record
Conditions
Magnetic Resonance Imaging, Functional
Interventions
Not listed
Lead sponsor
Yale University
Other
Eligibility
18 Years to 45 Years
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2009
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 14, 2012 · Synced Sep 26, 2026, 6:09 AM EDT
Completed Not applicable Interventional

Mobile Contingency Management for Smoking Cessation in Returning US Veterans

NCT02513069
View directory record Official record
Conditions
Smoking, Veterans
Interventions
Nicotine gum, mobile contingency management, Telephone counseling, Nicotine patch, Nicotine lozenge, Smart phone, Carbon monoxide monitor
Other · Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
291 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 20, 2020 · Synced Sep 26, 2026, 6:09 AM EDT
Not listed No phase listed Observational

Hyperbaric Oxygen Therapy and SPECT Brain Imaging in Carbon Monoxide Poisoning

NCT00596180
View directory record Official record
Conditions
Neuropsychiatric Sequelae of Carbon Monoxide Poisoning
Interventions
HBOT
Drug
Lead sponsor
Paul G. Harch, M.D.
Other
Eligibility
Not listed
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2019
U.S. locations
1
States / cities
Marrero, Louisiana
Source: ClinicalTrials.gov public record
Updated Apr 17, 2017 · Synced Sep 26, 2026, 6:09 AM EDT
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 18, 2016 · Synced Sep 26, 2026, 6:09 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Oral Nicotine Pouches Versus Nicotine Replacement Therapy to Reduce Cigarette Use for Smokers in Rural Appalachia

NCT06763536
View directory record Official record
Conditions
Cigarette Smoking-Related Carcinoma
Interventions
Carbon Monoxide Measurement, Nicotine Lozenge, Oral Nicotine Pouch, Nicotine Patch, Survey Administration, Check-in Phone Calls
Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
21 Years and older
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Sep 26, 2026, 6:09 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Cue Reactivity in Virtual Reality: The Role of Context

NCT00862927
View directory record Official record
Conditions
Smoking
Interventions
Breath Sample, Saliva Sample, Questionnaire, View Virtual Reality Scenes
Other · Behavioral
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 19, 2012 · Synced Sep 26, 2026, 6:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Impact of Waterpipe Tobacco Flavors on Waterpipe Smoking Intentions, Perceptions, Patterns, and Toxicant Exposure

NCT03232827
View directory record Official record
Conditions
Smoking, Hookah, Waterpipe Smoking
Interventions
Flavored-Sweetened Waterpipe Tobacco, Unflavored-sweetened waterpipe tobacco, Unflavored-very low sweetened waterpipe tobacco, Flavored-very low sweetened waterpipe
Behavioral
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 50 Years
Enrollment
91 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jun 23, 2019 · Synced Sep 26, 2026, 6:09 AM EDT
Completed Phase 2 Interventional Results available

Study of Inhaled Carbon Monoxide to Treat Idiopathic Pulmonary Fibrosis

NCT01214187
View directory record Official record
Conditions
Idiopathic Pulmonary Fibrosis
Interventions
inhaled carbon monoxide, Oxygen
Drug · Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 85 Years
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
8
States / cities
San Francisco, California • Chicago, Illinois • New Orleans, Louisiana + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 13, 2017 · Synced Sep 26, 2026, 6:09 AM EDT
Completed Not applicable Interventional

Technology and Telephone-Based Smoking Cessation

NCT03492645
View directory record Official record
Conditions
Smoking Cessation
Interventions
Telephone-and technology-facilitated treatment protocol, Office-based treatment protocol
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 69 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Sep 29, 2019 · Synced Sep 26, 2026, 6:09 AM EDT