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Postmortem lung weight with regard to survival time.

Jian-Hua Chen1, Li Quan, Takaki Ishikawa

  • 1Department of Legal Medicine, Osaka City University Medical School, Asahi-machi 1-4-3, Abeno, 545-8585 Osaka, Japan.

Legal Medicine (Tokyo, Japan)
|April 15, 2009
PubMed
Summary

Postmortem lung weight can indicate survival time. Heavier lungs, often due to edema and congestion, suggest a longer survival period in various fatal injury cases.

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Area of Science:

  • Forensic Pathology
  • Pulmonary Pathology
  • Trauma Research

Background:

  • Lung weight changes in shock are complex, decreasing with hemorrhage but increasing with edema and congestion from microvascular injury.
  • Understanding postmortem lung weight's relationship with survival time is crucial for forensic investigations.

Purpose of the Study:

  • To investigate the correlation between postmortem lung weight and survival duration across diverse causes of death.
  • To determine if lung weight can serve as an indicator of survival time.

Main Methods:

  • Analysis of serial autopsy cases (n=904) with varying causes of death, including blunt/sharp injuries, asphyxiation, intoxication, drowning, fire fatalities, and acute myocardial infarction (AMI).
  • Comparison of total lung weight in acute death cases (survival < 1 hour) across different injury types.
  • Assessment of lung weight trends in relation to survival time for each cause of death.

Main Results:

  • In acute deaths, lung weight varied by cause: lower in blunt/sharp injuries, higher in drowning/intoxication, intermediate in fire fatalities, asphyxiation, and AMI.
  • Total lung weight demonstrated a survival time-dependent increase in blunt/sharp injuries, fire fatalities, and mechanical asphyxiation.
  • No significant survival time-dependent lung weight increase was observed in AMI, drowning, or intoxication cases.

Conclusions:

  • Increased postmortem lung weight, indicative of congestion and edema, may suggest a longer survival time.
  • Lung weight can be a valuable indicator for estimating survival duration in specific forensic contexts.
  • The findings highlight the differential impact of injury types on lung physiology and postmortem changes.