Nondrowning Asphyxia in Veterinary Forensic Pathology: Suffocation, Strangulation, and Mechanical Asphyxia

Area of Science:

• Forensic pathology
• Veterinary pathology
• Comparative physiology

Background:

• Asphyxia in forensic contexts signifies death from cerebral anoxia/hypoxia due to injury.
• Nondrowning asphyxia includes strangulation, suffocation, and mechanical asphyxia, categorized by injury mechanism.
• Lesions in asphyxia cases may be absent or misattributed, necessitating comprehensive evidence for diagnosis.

Purpose of the Study:

• To review terminology, classification, mechanisms, and lesions of asphyxial deaths in companion animals.
• To highlight comparative physiological and anatomical differences in asphyxia responses between animals and humans.
• To guide veterinary pathologists in accurately interpreting animal asphyxia cases.

Main Methods:

• Review of forensic literature on asphyxia in humans and animals.
• Analysis of mechanisms and pathological findings in companion animal asphyxia.
• Comparative assessment of physiological responses to asphyxia in different species.

Main Results:

• Asphyxial deaths in animals share mechanisms with humans but exhibit distinct physiological responses.
• Consciousness duration and onset of death can differ significantly between species due to physiological and anatomical variations.
• Direct extrapolation from human forensic data to animals may be misleading.

Conclusions:

• Veterinary pathologists require specialized knowledge to interpret animal asphyxia accurately.
• Understanding species-specific responses is crucial for determining animal suffering and cause of death.
• This review provides a foundation for comparative forensic veterinary pathology of asphyxia.