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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 Measurement Clear all
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 28, 2026, 6:28 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Re-Connect Application for Smoking Cessation

NCT05224154
View directory record Official record
Conditions
Smoking Cessation, Acceptability of Health Care, Nicotine Dependence, Cigarettes
Interventions
Abstinent Contingent (AC) Re-Connect
Behavioral
Lead sponsor
Rowan University
Other
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Glassboro, New Jersey
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Sep 28, 2026, 6:28 PM EDT
Not yet recruiting Phase 1Phase 2 Interventional

Carbon Monoxide Hyperbaric Oxygen With Steroid Therapy

NCT06574048
View directory record Official record
Conditions
Carbon Monoxide Poisoning, Carbon Monoxide Intoxication, Carbon Monoxide Encephalopathy, Carbon Monoxide-induced Parkinsonism
Interventions
saline placebo, Dexamethasone
Drug
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Sep 28, 2026, 6:28 PM EDT
Completed Phase 4 Interventional Results available

Mobile Health Technology to Enhance Abstinence in Smokers With Schizophrenia

NCT02420015
View directory record Official record
Conditions
Schizophrenia, Cigarette Smoking
Interventions
Nicotine replacement therapy, Bupropion, cognitive-behavioral smoking cessation counseling, Mobile Contingency Management, Stay Quit Coach, SMS text messaging
Drug · Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years to 70 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 9, 2019 · Synced Sep 28, 2026, 6:28 PM EDT
Completed No phase listed Observational

Pulmonary Function in Patients With Hodgkin's Disease Receiving Bleomycin-Based Chemotherapy

NCT00165438
View directory record Official record
Conditions
Hodgkin's Disease
Interventions
Pulmonary Function Tests, CAT Scan
Procedure
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2010
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 19, 2012 · Synced Sep 28, 2026, 6:28 PM EDT
Terminated No phase listed Observational

Suspected Cases of Carbon Monoxide Poisoning in the ED

NCT03004235
View directory record Official record
Conditions
Carbon Monoxide Poisoning
Interventions
Observational data collection
Device
Lead sponsor
Nonin Medical, Inc
Industry
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 11, 2019 · Synced Sep 28, 2026, 6:28 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Graphic Cigarette Warnings

NCT02247908
View directory record Official record
Conditions
Smoking
Interventions
Surgeon General's Warning, Graphic Warning
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
2,149 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
2
States / cities
Oakland, California • Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 13, 2016 · Synced Sep 28, 2026, 6:28 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Nicotine Withdrawal and Reward Processing: Connecting Neurobiology to Real-world Behavior

NCT03840694
View directory record Official record
Conditions
Cigarette Smoking, Nicotine Withdrawal
Interventions
Smoking Abstinence, Ad Lib Smoking
Other
Lead sponsor
Duke University
Other
Eligibility
21 Years to 55 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated May 19, 2021 · Synced Sep 28, 2026, 6:28 PM EDT
Completed Not applicable Interventional Results available

QuitBet Phase II: A Digital Social Game That Pays You to Stop Smoking

NCT05075213
View directory record Official record
Conditions
Smoking Cessation
Interventions
contingency management (deposit contract), leaderboard and social feed, smoking cessation resource list
Behavioral
Lead sponsor
WayBetter, Inc.
Industry
Eligibility
21 Years and older
Enrollment
245 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced Sep 28, 2026, 6:28 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Project Impact 2: A Culturally Tailored Smoking Cessation Intervention for Latino Smokers

NCT02596711
View directory record Official record
Conditions
Tobacco Use Cessation, Cancer Prevention
Interventions
Nicotine Patch, Questionnaires, Carbon Monoxide (CO) Test, Health Education and Handouts, Culturally Tailored Reading Materials, Counseling Sessions
Drug · Behavioral · Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 9, 2020 · Synced Sep 28, 2026, 6:28 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Smoking Reduction In Gravid Substance Use Disorders

NCT04132232
View directory record Official record
Conditions
Tobacco Smoking in Mother Complicating Pregnancy, Tobacco Use Disorder, Tobacco Smoking
Interventions
knowledge of expired maternal carbon monoxide and fetal carboxyhemoglobin levels
Diagnostic Test
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
16 Years to 45 Years · Female only
Enrollment
74 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 4, 2024 · Synced Sep 28, 2026, 6:28 PM EDT
Not yet recruiting Not applicable Interventional

A Wearable Biosensor Patch for Non-Invasive Monitoring for Patients Undergoing Abdominal or Chest Surgery

NCT07612085
View directory record Official record
Conditions
Hematopoietic and Lymphatic System Neoplasm, Malignant Solid Neoplasm
Interventions
Biospecimen Collection, Electronic Health Record Review, Interview, Survey Administration, Wearable Biosensor Patch
Procedure · Other · Device
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated May 27, 2026 · Synced Sep 28, 2026, 6:28 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Smoking Cessation for Veterans With Severe and Persistent Mental Illness

NCT00960375
View directory record Official record
Conditions
Schizoaffective Disorder, Schizophrenia, Affective Psychosis, Bipolar, Affective Disorders, Psychotic
Interventions
BTSCS, StSST
Behavioral
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years to 75 Years
Enrollment
179 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
2
States / cities
Washington D.C., District of Columbia • Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 17, 2015 · Synced Sep 28, 2026, 6:28 PM EDT
Withdrawn Phase 2 Interventional

Safety and Tolerability Study of Inhaled Carbon Monoxide in Kidney Transplant Patients

NCT00531856
View directory record Official record
Conditions
Kidney Transplantation
Interventions
Inhaled Carbon Monoxide
Drug
Lead sponsor
Mallinckrodt
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
3
States / cities
San Francisco, California • Chicago, Illinois • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 18, 2016 · Synced Sep 28, 2026, 6:28 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Study of a Smartphone-Based Switch Program

NCT06544772
View directory record Official record
Conditions
Smoking Cessation
Interventions
Pivot cigarette smoking cessation program
Device
Lead sponsor
Pivot Health Technologies Inc.
Industry
Eligibility
21 Years to 65 Years
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
San Carlos, California
Source: ClinicalTrials.gov public record
Updated Oct 1, 2025 · Synced Sep 28, 2026, 6:28 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

COPD-Related Physiology and the Brain

NCT03269721
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive (COPD), Cognitive Impairment
Interventions
Neuropsychological Assessment, Spirometry, Arterial Blood Gas, Diffusion Capacity of the Lung for Carbon Monoxide, 6 Minute Walk Test, Systemic Vascular Measures, Blood Biomarkers, Symptom Questionnaire Measures, Brain MRI
Behavioral · Procedure · Diagnostic Test + 1 more
Lead sponsor
Karin Hoth
Other
Eligibility
30 Years to 85 Years
Enrollment
170 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2025
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Dec 23, 2025 · Synced Sep 28, 2026, 6:28 PM 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 28, 2026, 6:28 PM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

Hookah Smoking, Carbon Monoxide, and Coronary Endothelial Function

NCT03166787
View directory record Official record
Conditions
Smoking, Endothelial Dysfunction
Interventions
Charcoal hookah, E-coal hookah, Cigarette, Carbon Monoxide inhalation, Room Air inhalation, vitamin C, tadalafil
Other · Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
21 Years to 49 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 8, 2021 · Synced Sep 28, 2026, 6:28 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Pilot Feasibility Study of a Novel Non-invasive Device for Diagnosis of Anemia

NCT06159348
View directory record Official record
Conditions
Anemia
Interventions
Anemia Diagnostic Assistant (ADA), Serum hemoglobin
Diagnostic Test
Lead sponsor
University of Utah
Other
Eligibility
17 Years to 70 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jul 23, 2024 · Synced Sep 28, 2026, 6:28 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Get Quit - Stay Quit Study

NCT01980485
View directory record Official record
Conditions
Nicotine Dependent Cigarette Smoker
Interventions
Lung Age feedback and exhaled carbon monoxide, No Lung Age Feedback
Behavioral
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
21 Years and older
Enrollment
225 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
4
States / cities
Harrisburg, Pennsylvania • Hershey, Pennsylvania • Palmyra, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 25, 2019 · Synced Sep 28, 2026, 6:28 PM 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 28, 2026, 6:28 PM 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 28, 2026, 6:28 PM EDT
Completed Not applicable Interventional Results available

Monitoring of Exhaled Carbon Monoxide to Promote Pre-operative Smoking Cessation

NCT01014455
View directory record Official record
Conditions
Smoking
Interventions
Informing surgical patients about CO monitoring, a brief intervention recommending preoperative abstinence from smoking
Behavioral
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
169 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 21, 2011 · Synced Sep 28, 2026, 6:28 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Sustaining Smoking Cessation in Smokers With Kids With Asthma

NCT00862368
View directory record Official record
Conditions
Asthma, Smoking Cessation
Interventions
PAM, PAM-Enhanced/Asthma Counseling Phone Calls, Follow-Up Phone Calls - Child Wellness Topic
Behavioral
Lead sponsor
The Miriam Hospital
Other
Eligibility
18 Years and older
Enrollment
573 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2011
U.S. locations
5
States / cities
Fall River, Massachusetts • Pawtucket, Rhode Island • Providence, Rhode Island + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 24, 2012 · Synced Sep 28, 2026, 6:28 PM EDT