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Related Experiment Videos

Evaluation of post-mortem oxymetry in fire victims

H Maeda1, K Fukita, S Oritani

  • 1Department of Legal Medicine, Osaka City University Medical School, Japan.

Forensic Science International
|August 15, 1996
PubMed
Summary

Fire victim blood analysis reveals high carboxyhemoglobin (CO-Hb) levels indicate fatal carbon monoxide poisoning and acute heart failure. Oxymetric profiles help understand blood gas changes in fire fatalities.

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Area of Science:

  • Forensic Toxicology
  • Cardiovascular Pathology
  • Environmental Health

Background:

  • Fires pose significant mortality risks due to complex toxicological and physiological effects.
  • Understanding the pathophysiology of fire-related deaths is crucial for forensic investigations.
  • Carbon monoxide (CO) poisoning is a primary concern in fire fatalities.

Purpose of the Study:

  • To investigate the pathophysiology of death in fire victims.
  • To evaluate oxymetric differences in blood samples from fire fatalities.
  • To correlate carboxyhemoglobin (CO-Hb) levels with physiological responses.

Main Methods:

  • Analysis of blood samples from 48 fire victims using CO-oximeter systems.
  • Measurement of oxymetric differences between arterial and venous blood.

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  • Comparison of blood gas parameters between central (heart) and peripheral samples.

    • Main Results:

    • Post-mortem CO-Hb levels varied widely (0.4-94.7%).
    • Significant arterio-venous and centro-peripheral CO-Hb differences were noted in cases with >70% CO-Hb, suggesting acute CO poisoning and heart failure.
    • Paradoxical findings in reduced hemoglobin levels were observed in some cases.

    Conclusions:

    • High CO-Hb levels are indicative of fatal carbon monoxide poisoning and acute heart failure in fire victims.
    • Oxymetric profiles can aid in assessing the final blood gas balance in fire fatalities.
    • Post-mortem changes must be considered when interpreting blood gas data.