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Showing 1–24 of 51 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Carbon Monoxide Clear all
Enrolling by invitation No phase listed Observational

Carbon Monoxide Blood and DNA Biorepository

NCT01758653
View directory record Official record
Conditions
Carbon Monoxide Poisoning
Interventions
No study intervention
Other
Lead sponsor
Intermountain Health Care, Inc.
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2032
U.S. locations
2
States / cities
Murray, Utah • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Sep 28, 2023 · Synced Sep 10, 2026, 5:11 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 10, 2026, 5:11 AM EDT
Completed No phase listed Observational

Breath Carbon Monoxide and Cotinine as Biomarkers to Distinguish Smokers From Nonsmokers

NCT01031121
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Not listed
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 64 Years
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 10, 2026, 5:11 AM EDT
Completed Phase 1 Interventional

Carbon Monoxide to Prevent Lung Inflammation

NCT00094406
View directory record Official record
Conditions
Respiratory Distress Syndrome, Adult
Interventions
Bronchoscopy, Bronchoalveolar lavage, Endotoxin, Carbon Monoxide
Procedure · Drug
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years to 40 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 16, 2019 · Synced Sep 10, 2026, 5:11 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Prediction of Jaundice in Term Infants

NCT01203410
View directory record Official record
Conditions
Infant, Newborn, Jaundice
Interventions
Not listed
Lead sponsor
NICHD Neonatal Research Network
Network
Eligibility
Up to 8 Hours
Enrollment
535 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1991 – 1992
U.S. locations
13
States / cities
Palo Alto, California • New Haven, Connecticut • Washington D.C., District of Columbia + 10 more
Source: ClinicalTrials.gov public record
Updated Mar 21, 2019 · Synced Sep 10, 2026, 5:11 AM EDT
Terminated No phase listed Observational

Outcome Following Carbon Monoxide Poisoning in Children

NCT01059708
View directory record Official record
Conditions
Carbon Monoxide Poisoning
Interventions
Not listed
Lead sponsor
Intermountain Health Care, Inc.
Other
Eligibility
6 Years to 16 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Mar 16, 2011 · Synced Sep 10, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Assessing Toxicity of Waterpipe Tobacco Smoking

NCT03253653
View directory record Official record
Conditions
Waterpipe Smoking
Interventions
Differential effects of waterpipe smoking practices on toxicity of waterpipe tobacco smoke
Device
Lead sponsor
San Diego State University
Other
Eligibility
21 Years and older
Enrollment
85 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Apr 8, 2025 · Synced Sep 10, 2026, 5:11 AM 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 10, 2026, 5:11 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Evaluation of Short-term Safety and Use Patterns of an Electronic Nicotine Delivery System

NCT01898169
View directory record Official record
Conditions
Nicotine Dependence
Interventions
NJOY King 26 mg nicotine Electronic Nicotine Delivery System
Other
Lead sponsor
LA Clinical Trials
Other
Eligibility
18 Years to 65 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Burbank, California
Source: ClinicalTrials.gov public record
Updated Jul 11, 2013 · Synced Sep 10, 2026, 5:11 AM EDT
Completed Not applicable Interventional Results available

Postoperative Heme Oxygenase Induction and Carbon Monoxide Production as a Novel Method to Assess Hepatic Regeneration and Predict Hepatic Related Morbidity After Partial Hepatectomy

NCT04195438
View directory record Official record
Conditions
Liver Cancer
Interventions
CO Testing Pre/Post Hepatic Resection, ABG Testing Pre/Post Hepatic Resection, CT Evaluations
Procedure · Diagnostic Test
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2024
U.S. locations
1
States / cities
Glen Burnie, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 20, 2024 · Synced Sep 10, 2026, 5:11 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 10, 2026, 5:11 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 10, 2026, 5:11 AM EDT
Completed Not applicable Interventional Results available

COach2Quit TRIAL: Assessing a Prototype Personal Carbon Monoxide Monitor for Smoking Cessation

NCT03142932
View directory record Official record
Conditions
Smoking, Smoking Cessation
Interventions
Individualized carbon monoxide (iCO) monitor, COach2Quit smartphone application, Cessation counseling
Device · Other · Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 3, 2019 · Synced Sep 10, 2026, 5:11 AM EDT
Completed No phase listed Observational

Effects of Hemoperitoneum Driven Carbon Monoxide on Post-Traumatic Stability and Platelet Aggregation

NCT01594034
View directory record Official record
Conditions
Hemoperitoneum
Interventions
expired air
Procedure
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years and older · Female only
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated May 13, 2012 · Synced Sep 10, 2026, 5:11 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 10, 2026, 5:11 AM EDT
Recruiting Phase 2 Interventional

Low-dose Carbon Monoxide (HBI-002) Trial to Evaluate Safety, Tolerability, PK, and Biomarkers in Parkinson's Disease

NCT07005180
View directory record Official record
Conditions
Parkinson Disease
Interventions
HBI-002, Vehicle (placebo)
Drug
Lead sponsor
Hillhurst Biopharmaceuticals, Inc.
Industry
Eligibility
40 Years to 80 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
5
States / cities
Fountain Valley, California • Gainesville, Florida • Farmington Hills, Michigan + 2 more
Source: ClinicalTrials.gov public record
Updated Aug 9, 2026 · Synced Sep 10, 2026, 5:11 AM 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 10, 2026, 5:11 AM EDT
Completed Early Phase 1 Interventional

Non Invasive Oral Cancer Screening Among HIV Infected Individuals

NCT02823847
View directory record Official record
Conditions
Malignant Neoplasms of Mesothelial and Soft Tissue, Human Immunodeficiency Virus
Interventions
Screening Interview, Carbon Monoxide Test, Self-Help Materials, Visual Oral Screening Examination, Direct Fluorescent Oral Visualization Examination, Oral Biopsy
Behavioral · Device · Procedure
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 13, 2022 · Synced Sep 10, 2026, 5:11 AM 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 10, 2026, 5:11 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Carbon Monoxide Levels and Sickle Cell Disease Severity

NCT01547793
View directory record Official record
Conditions
Sickle Cell Disease, Sickle Cell Anemia, Anemia, Sickle Cell
Interventions
Not listed
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years and older
Enrollment
106 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 4, 2019 · Synced Sep 10, 2026, 5:11 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 10, 2026, 5:11 AM 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 10, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Exhaled Carbon Monoxide (eCO) for Diffusing Capacity (DLCO) Correction

NCT01126047
View directory record Official record
Conditions
Lung Diseases
Interventions
eCO testing
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
2
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 8, 2011 · Synced Sep 10, 2026, 5:11 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Normal Quantitative EEG (qEEG) Dataset

NCT02375126
View directory record Official record
Conditions
Carbon Monoxide Poisoning
Interventions
Electroencephalography
Procedure
Lead sponsor
Intermountain Health Care, Inc.
Other
Eligibility
18 Years to 55 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2023
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Aug 9, 2022 · Synced Sep 10, 2026, 5:11 AM EDT