Acute and Critical Care

Original Article

Epidemiology
Long-term mortality of adult patients with carbon monoxide poisoning presenting to the emergency department in Korea: a population-based cohort study: Sang Hwan Lee, Soo Rack Ryu, Kyung Hun Yoo, Juncheol Lee, Yongil Cho, Tae Ho Lim, Hyunggoo Kang, Jaehoon Oh, Byuk Sung Ko; Acute Crit Care. 2024;39(4):526-534. Published online November 18, 2024; DOI: https://doi.org/10.4266/acc.2024.00199

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Background
Carbon monoxide (CO) poisoning can lead to significant morbidity and mortality. However, relatively few studies have investigated its long-term mortality impact. This nationwide population-based cohort study examined the association between CO poisoning and long-term mortality.
Methods
This retrospective study utilized data from the National Health Insurance Service database in South Korea. We compared the patients with CO poisoning to those without CO poisoning. Inverse probability treatment weights were applied to both groups to control for potential confounding factors. Subsequently, mortality was assessed using the incidence rate and Cox proportional hazard ratios.
Results
This study included 23,387 patients with CO poisoning and 359,851 without it. Over a median follow-up period of 7.6 years after CO poisoning diagnosis, the mortality risk was 2.6 times higher in patients with CO poisoning compared to that in the control group. In a long-term follow-up of patients surviving beyond 30 days, mortality remained 2.18 times higher. Additionally, a higher mortality risk was observed in the relatively younger age group (18–39 years) and the group with fewer underlying diseases, as indicated by a Charlson Comorbidity Index score of 0.
Conclusions
CO poisoning is associated with an elevated long-term mortality rate particularly in a relatively young and healthy population.

Citations

Citations to this article as recorded by

Optimizing hyperbaric oxygen initiation time in carbon monoxide poisoning: a 3-hour window enhances neurological recovery via lactate clearance
Dongjun Xu, Xiaoqin Xu, Hui Sun, Jun Xu, Danting Fei, Yaye Shen
Open Medicine.2026;[Epub] CrossRef

Case Report

Treatment of Carbon Monoxide Poisoning with Therapeutic Hypothermia: Young Hwan Lee, You Dong Sohn, Seung Min Park, Won Wong Lee, Ji Yun Ahn, Hee Cheol Ahn; Korean J Crit Care Med. 2013;28(3):218-220.; DOI: https://doi.org/10.4266/kjccm.2013.28.3.218

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Abstract PDF

Carbon monoxide (CO) is a well-known chemical asphyxiant, which causes tissue hypoxia with prominent neurological injury. Therapeutic hypothermia (TH) has been shown to be an effective neuroprotective method in post-cardiac arrest patients. A 26-year-old man presented to the emergency department with severe CO poisoning. On arrival, the patient was comatose. His vital signs were blood pressure, 130/80 mm Hg; heart rate, 126/min; respiratory rate, 26/min; body temperature, 36degrees C; and O2 saturation, 94%. Initial carboxyhemoglobin was 45.2%. Because there was no available hyperbaric chamber in our local area, he was intubated and treated with TH. The target temperature was 33 +/- 1degrees C for 24 hours using an external cooling device. The patient was then allowed to reach normothermia by 0.15-0.25degrees C/hr. The patient was discharged after normal neurological exams on day 11 at the hospital. TH initiated after exposure to CO may be an effective prophylactic method for preventing neurological sequelae.

Citations

Citations to this article as recorded by

Dexmedetomidine Use in Patients with 33℃ Targeted Temperature Management: Focus on Bradycardia as an Adverse Effect
Hyo-yeon Seo, Byoung-joon Oh, Eun-jung Park, Young-gi Min, Sang-cheon Choi
The Korean Journal of Critical Care Medicine.2015; 30(4): 272. CrossRef

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