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HOME > J Korean Soc Clin Toxicol > Volume 18(1); 2020 > Article
Associations between Early Hyperoxia and Long Term Neurologic Outcome in Acute Carbon Monoxide Poisoning
Ju Chan Kim, Byeong Jo Chun, Jeong Mi Moon, Young Soo Cho
Journal of The Korean Society of Clinical Toxicology 2020;18(1):18-25
DOI: https://doi.org/10.22537/jksct.2020.18.1.18
Published online: June 30, 2020
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1Department of Emergency Medicine, Chonnam National University Medical School
2Department of Emergency Medicine, Chonnam National University Medical School
3Department of Emergency Medicine, Chonnam National University Medical School
4Department of Emergency Medicine, Chonnam National University Medical School

Purpose: We studied the impact of arterial oxygen tension (PaO2) on the long term neurologic outcome in patients with acute carbon monoxide poisoning. Methods: The study population included 311 patients who presented to emergency department with acute CO poisoning from January 2015 to January 2018. These patients underwent arterial blood gas testing at the time of presentation. The baseline demographic, clinical, laboratory, and clinical outcome data were recorded. The primary outcome of interest was the long term neurologic status. Results: The normoxia group was significantly older and it had a higher incidence of diffusion weighted MRI abnormality, and this group needed multiple HBO sessions compared to the group with moderate or severe hyperoxia. Also, the incidence of altered mentality at discharge was higher in the normoxia group than that of the moderate hyperoxia group. The incidence of a poor long term neurologic outcome was 11.3%. The incidence of a poor long term neurologic outcome decreased as the PaO2 increased. The PaO2 was significantly lower in patients with a poor long term neurologic outcome than that of the patients with a good outcome 198 (165.2 to 231.1) mmHg in the good outcome group vs. 154 (119-162) mmHg in poor outcome, p<0.001). In multivariate logistic regression analysis, PaO2 was selected as an independent factor of the poor long-term neurologic outcome (OR 0.981 (95% CI: 0.968 to 0.995)) Conclusion: Higher PaO2 was independently associated with a lower incidence of a poor long-term neurologic outcome.

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JKSCT : Journal of The Korean Society of Clinical Toxicology