| Not Yet Recruiting | Carbon Monoxide Hyperbaric Oxygen With Steroid Therapy NCT06574048 | University of Nebraska | Phase 1 / Phase 2 |
| Not Yet Recruiting | Maternal Smoking Exposure and Newborn Outcomes: Study Using Urinary Cotinine NCT07201181 | Haseki Training and Research Hospital | — |
| Recruiting | The Efficacy of Dexamethasone in Combination With N-acetylcysteine in Preventing Neurocognitive Sequelae Due t NCT06811675 | China Medical University Hospital | Phase 4 |
| Terminated | Optimal Number of Hyperbaric Oxygen Treatments for Carbon Monoxide Poisoning NCT06619717 | University of Alberta | N/A |
| Completed | Comparison of the Effectiveness of Treatments in Carbon Monoxide Intoxications NCT06198595 | Ankara City Hospital Bilkent | — |
| Withdrawn | Hyperbaric Oxygen for Carbon Monoxide Induced Chronic Encephalopathy NCT04118491 | University of Nebraska | N/A |
| Unknown | The Efficacy of L-Carnitine in the Management of Acute Carbon Monoxide Poisoning NCT05647707 | Alexandria University | Phase 2 |
| Recruiting | Microparticles Blood Level in Acute Carbon Monoxide Poisoning NCT05591300 | Azienda Ospedaliero Universitaria Maggiore della Carita | — |
| Recruiting | Cardiotoxicity of Carbon Monoxide in Patients Treated With Hyperbaric Oxygen Therapy NCT06549621 | University Hospital, Brest | — |
| Active Not Recruiting | Adjunct Targeted Temperature Management in Acute Severe Carbon Monoxide Poisoning NCT04975867 | Wonju Severance Christian Hospital | N/A |
| Not Yet Recruiting | Neurological Sequelae in Patients With Acute Carbon Monoxide Poisoning NCT04925297 | The First Hospital of Jilin University | — |
| Unknown | Cognitive and Blood Biomarker Assessment After CO Exposure NCT04475263 | St George's, University of London | — |
| Completed | Hyperbaric Oxygen Therapy Initiation Time in Acute Carbon Monoxide Poisoning NCT04656912 | Wonju Severance Christian Hospital | — |
| Recruiting | CARbon monoxidE intoxiCatiOn in Korea: Prospective Cohort (CARE CO Cohort) NCT04490317 | Wonju Severance Christian Hospital | — |
| Completed | Prognostic Biomarkers in CO Poisoning NCT05088005 | Wonju Severance Christian Hospital | — |
| Completed | Quantitative Assessment of Pupillary Light Reflex in Acute Carbon Monoxide Poisoning NCT05110820 | Wonju Severance Christian Hospital | — |
| Completed | Carbon Monoxide-induced Coma: Prognostic Factors NCT03926494 | Assistance Publique - Hôpitaux de Paris | — |
| Unknown | The Role of High-flow Nasal Cannula Therapy in the Treatment of Acute Carbon Monoxide Poisoning NCT03818841 | Università degli Studi del Piemonte Orientale Amedeo Avogadro | N/A |
| Completed | Is Transcutaneous Carbon Monoxide Saturation of E-cigarette Users Comparable to That of Smokers? NCT03669848 | University Hospital, Tours | — |
| Completed | Cardiac Magnetic Resonance Image (CMR) in Acute Carbon Monoxide (CO) Poisoning NCT04419298 | Wonju Severance Christian Hospital | — |
| Completed | Utility of High Flow Nasal Cannula in CO Toxicity NCT03342209 | Kocaeli University | N/A |
| Completed | Dysfunctional Hemoglobin Pulse Oximetry NCT03030833 | Nonin Medical, Inc | — |
| Terminated | Suspected Cases of Carbon Monoxide Poisoning in the ED NCT03004235 | Nonin Medical, Inc | — |
| Terminated | Utility of Non-invasive Carboxyhemoglobin and Total Hemoglobin Measurement in the Emergency Department NCT03017742 | Masimo Corporation | — |
| Unknown | Normal Quantitative EEG (qEEG) Dataset NCT02375126 | Intermountain Health Care, Inc. | — |
| Enrolling By Invitation | Carbon Monoxide Blood and DNA Biorepository NCT01758653 | Intermountain Health Care, Inc. | — |
| Unknown | Role of Pulse Co-oximetry for Detecting Carbon Monoxide Poisoning in the Prehospital Emergency Medical Service NCT02860455 | University Hospital, Montpellier | N/A |
| Completed | Analysis of Emergency Department (ED) Volumes During Natural Disasters NCT01059981 | The University of Texas Health Science Center, Houston | — |
| Unknown | Carbon Monoxide Monitoring and Emergency Treatment NCT00841165 | University of Vermont | N/A |
| Terminated | Outcome Following Carbon Monoxide Poisoning in Children NCT01059708 | Intermountain Health Care, Inc. | — |
| Completed | One vs. Three Hyperbaric Oxygen Treatments for Acute Carbon Monoxide Poisoning NCT00465855 | Intermountain Health Care, Inc. | Phase 4 |
| Withdrawn | Cyanide Poisoning in Fire Victims NCT00280579 | Rigshospitalet, Denmark | — |
| Unknown | Hyperbaric Oxygen Therapy Registry NCT02483650 | U.S. Wound Registry | — |
| Terminated | Hyperbaric Oxygen Therapy for Comatose Patients With Acute Carbon Monoxide Poisoning NCT01099995 | University of Versailles | Phase 3 |
| Terminated | Hyperbaric Oxygen Therapy for Acute Domestic Carbon Monoxide (CO) Poisoning NCT01100515 | University of Versailles | Phase 3 |
| Withdrawn | Occult Carbon Monoxide Poisoning Detection by Pulsated Carboxymetry in an Emergency Department NCT02931448 | Poitiers University Hospital | — |