ResumoO álcool (etanol) é uma substância psicoativa presente em bebidas muito utilizadas pela sociedade desde tempos antigos até os dias atuais. Assim, é muito presente no organismo dos envolvidos nos acidentes de trânsito com vítimas fatais. A análise de sua concentração na vítima é realizada por peritos, no entanto, possui muitos paradoxos quanto à sua verossimilhança. Metodologia: foi realizada uma revisão bibliográfica acerca de conceitos toxicológicos, diferenças de amostras utilizadas, de principais metabólitos do álcool e de aspectos de valores do mesmo nos acidentes de trânsito, visando ilustrar os dilemas enfrentados pelos profissionais forenses no dia a dia. Conclusão: O procedimento analítico adotado pelo perito é variante conforme a cena do acidente, demandando uma completa análise das informações e amostras disponíveis. AbstractAlcohol (ethanol) is a psychoactive substance present in drinks that are highly used by society from past to present. Therefore, it is present a lot in the bodies from the involved on traffic accidents with fatal victims. The concentration analysis on the victim is made by forensics experts, although, it has so many paradoxes with respect to it likelihood. Methodology: a literature review was made about toxicological concepts, differences from used specimens, from alcohol main metabolites and from values aspects on traffic accidents, aiming to illustrate the faced daily dilemmas by the forensics professionals. Conclusion: the analytical process adopted by the forensics expert diversifies according to the accident scene, demanding a full analysis on data and available samples.
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