Possible factors contributing to the postmortem lung weight in fire fatalities

Area of Science:

• Forensic Pathology
• Cardiovascular Pathology

Background:

• Postmortem lung weight is a critical forensic parameter.
• Factors influencing lung weight, especially in fire fatalities, require further investigation.
• Understanding these factors aids in determining cause and manner of death.

Purpose of the Study:

• To investigate factors affecting postmortem lung weight in acute fire fatalities.
• To compare these factors with control groups: acute myocardial infarction/ischemia (AMI) and mechanical asphyxiation.
• To identify gender and age-dependent influences on lung weight.

Main Methods:

• Analysis of postmortem lung and heart weights from 333 cases (149 fire fatalities, 99 AMI, 85 mechanical asphyxiation).
• Categorization of fire fatalities by blood carboxyhemoglobin (COHb) levels (<60% and >60%).
• Statistical analysis to assess correlations with age, gender, postmortem interval, and body charring.

Main Results:

• Lung weight showed significant gender differences (males>females) and negative correlation with age.
• Lung weight positively correlated with heart weight across all groups.
• Gender differences in lung-heart weight ratio were observed in elderly fire fatalities and AMI, but not mechanical asphyxiation.

Conclusions:

• Heart weight is a potential contributor to increased lung weight in acute deaths.
• Gender and age-dependent factors influence susceptibility in fire fatalities and AMI.
• Elderly females are particularly susceptible in fire fatalities, and cardiomegaly may be a risk factor.