Implications of intracochlear decomposition gas formation in non-putrefied cadavers

TL;DR

This study found that gas can form in the inner ear of non-putrefied cadavers, which may impact cochlear implant research and postmortem analysis.

Contribution

The study identifies intracochlear gas formation in non-putrefied cadavers, a rare phenomenon detectable via pmCT.

Findings

Gas was found in the vestibule and cochlea of two non-putrefied hanging fatalities.

Intracochlear gas formation can occur without head trauma or visible putrefaction.

This phenomenon may affect cochlear pressure research in postmortem human temporal bones.

Abstract

Postmortem computed tomography (pmCT) prior to forensic autopsy has become increasingly important in recent decades, especially in forensic documentation of single injuries, injury patterns, and causes of death. Postmortem decomposition gas formation can also be detected in pmCT scans, which might affect cochlear implant research in postmortem human temporal bones (TBs).

Fifty non-putrefied hanging fatalities within a 2-year period (January 2017 to December 2019) were included with 100 TBs. Each body underwent whole-body pmCT prior to forensic autopsy. PmCT scans were analyzed with respect to the presence of intracochlear gas despite the lack of putrefaction at autopsy by an experienced fellow neurotologist.

PmCT revealed gas formation in two individuals despite the lack of head trauma and putrefaction at postmortem examination and autopsy. Both individuals showed enclosed gas in the vestibule and the cochlea on both sides.

Intracochlear gas formation, most likely related to decomposition, may occur despite the lack of putrefaction at postmortem examination and autopsy and can be detected by pmCT. This finding seems to be rather rare in non-traumatic death cases but might affect cochlear pressure research in postmortem human TB.

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