Necropsy findings in fatal hypothermia cases

Area of Science:

• Forensic Pathology
• Toxicology

Background:

• Hypothermia is a significant cause of accidental and suicidal deaths.
• Accurate post-mortem diagnosis of hypothermia is crucial for forensic investigations.

Purpose of the Study:

• To analyze necropsy findings in fatal hypothermia cases.
• To identify reliable diagnostic indicators for hypothermia.

Main Methods:

• Retrospective analysis of 22 fatal hypothermia cases.
• Examination of external and internal macroscopic autopsy findings.
• Microscopic examination of myocardial tissue.
• Analysis of urinary histamine, serotonin, and catecholamine levels.

Main Results:

• Frequent external signs: purple skin, facial/extremity swelling (54-59%).
• Common internal signs: gastric erosions/hemorrhages (50%), pulmonary edema, renal/hepatic degeneration.
• Microscopic findings: myocardial degenerative foci/fuchsinophilic fibers (two-thirds).
• Elevated urinary catecholamines (>0.1 mug/ml) observed in most cases.

Conclusions:

• Purple skin, facial edema, gastric erosions, myocardial changes, and high urinary catecholamines are key diagnostic markers for fatal hypothermia.
• Urinary catecholamine levels indicate increased excretion due to cold exposure.
• Histamine and serotonin levels were not indicative of increased excretion.