• Forensic Sci. Int. · Jun 2019

    Epidemiology and forensic aspects of carbon monoxide intoxication in Portugal: A three years' analysis.

    • Margarida Costa, Beatriz S Silva, Francisco C Real, and Helena M Teixeira.
    • National Institute of Legal Medicine and Forensic Sciences, Portugal. Electronic address: margarida.costa@inmlcf.mj.pt.
    • Forensic Sci. Int. 2019 Jun 1; 299: 1-5.

    AbstractThe presented manuscript describes the carbon monoxide (CO) related deaths in Portugal over a period of 3 years, based on autopsies carried out at the National Institute of Legal Medicine and Forensic Sciences, from January 2012 to December 2014. Three hundred and forty-seven forensic autopsy reports with carboxyhaemoglobin (COHb) analysis requests were analysed and subdivided into three main groups: (1) improbable CO intoxication; (2) possible CO intoxication; (3) highly probable CO intoxication. In group 1, COHb analysis was negative, and the death circumstances, as well as the post mortem findings, didn't corroborate an exposition to CO. In group 2, with COHb positive in 1/3 of the cases, the death circumstances corroborated an exposition to CO, but the post mortem findings weren't enough to confirm an exposition to this substance. In group 3, the results of COHb were positive, and both circumstances of death and post mortem findings corroborated an exposition to CO. The first group (113 cases) had no specific suspicion of a CO intoxication and, thus, the request of a COHb analysis had no particular basis, reflected in the low COHb achieved percentage (between 0 and 12). In the second group (164 cases), 29% of the cases were directly or indirectly related to CO exposure (between 0% and 94%). In the third group (70 cases), 56 deaths were due to CO intoxication and 14 due to burns after CO inhalation (between 18% and 91%). This study intended to do, not only a 3-year assessment of CO poisoning, but also to enhance the fact that circumstantial information, as well as a correct evaluation at the forensic autopsy data are crucial, and allow an enhanced diagnosis of possible intoxication, as well as a better guidance for the consequent toxicological analysis requests.Copyright © 2019. Published by Elsevier B.V.

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