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Related Experiment Videos

Alcohol distribution in different postmortem body fluids.

B S De Martinis1, C M C de Paula, A Braga

  • 1Department of Pathology, Center of Legal Medicine, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Rua Tenente Catão Roxo 2418, Ribeirão Preto, São Paulo, 14051-140, Brazil. martinis@fmrp.usp.br

Human & Experimental Toxicology
|March 17, 2006
PubMed
Summary
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Vitreous humor is a reliable alternative for postmortem ethanol testing when blood or urine samples are unavailable or compromised. This study found strong correlations between vitreous humor and blood/urine alcohol concentrations.

Area of Science:

  • Forensic Toxicology
  • Analytical Chemistry

Background:

  • Postmortem ethanol determination is crucial in forensic toxicology.
  • Challenges exist with blood and urine sample availability and integrity.
  • Vitreous humor is explored as an alternative sampling site.

Purpose of the Study:

  • To establish correlations between postmortem ethanol concentrations in vitreous humor, blood, and urine.
  • To validate vitreous humor as a viable alternative sample for ethanol analysis.

Main Methods:

  • Ethanol concentrations were measured in heart blood, subclavian blood, femoral blood, urine, and vitreous humor from 21 cadavers.
  • Capillary gas chromatography with a flame ionization detector and headspace techniques were employed.
  • Duplicate determinations were performed for accuracy.

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Main Results:

  • No significant differences were found between vitreous humor and urine or blood ethanol concentrations.
  • High Pearson's correlation coefficients were observed: 0.97 (femoral blood/urine), 0.96 (heart blood), and 0.94 (subclavian blood).
  • All tested fluids showed a significant correlation with vitreous humor (P <0.05).

Conclusions:

  • Vitreous humor is a suitable alternative sample for postmortem ethanol analysis.
  • This finding supports the use of vitreous humor when traditional samples are problematic.