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  • Title: Back hemorrhage in bath-related deaths: Insights into the mechanism of bath-related deaths.
    Author: Oshima T, Ohtani M, Mimasaka S.
    Journal: Forensic Sci Int; 2020 Mar; 308():110146. PubMed ID: 31958646.
    Abstract:
    Forensic pathologists often encounter difficulties while diagnosing bath-related deaths owing to a lack of specific findings for determining the cause. This study reports the characteristic findings noted during autopsy associated with bath-related deaths. The subjects included individuals found deceased in water-filled bathtubs. Originally, a "bathtub death" was defined as a case of drowning in a bathtub without a known cause despite complete investigation including a complete autopsy and examination of the death scene. We also excluded cases with ethanol and/or high drug concentrations in the blood from "bathtub death" cases. Muscular hemorrhages around the scapula were the most common in cases of accidental drowning (72.7%). The frequency of muscular hemorrhages around the scapula was low in cases involving bathtub deaths (11.1%) and natural disease. Subcutaneous hemorrhages in the back were the most frequent in cases of bathtub death (88.9%), followed by accidental drowning (81.8%). The frequency of subcutaneous hemorrhages in the back was low in cases involving suicide and natural disease. The presence of subcutaneous hemorrhages in the back without muscular hemorrhages around the scapula were strongly associated with bathtub deaths (Fisher's exact test, P < 0.0001; sensitivity, 0.84; specificity, 0.91). Subcutaneous hemorrhages were the most frequent in the waist (68.8%), followed by the upper back (50%). Subcutaneous hemorrhages in the back without muscular hemorrhages around the scapula indicated that the deceased had hit their back on falling from a standing position after experiencing disturbances of consciousness. We found the occurrence of orthostatic hypotension while getting out of the bathtub to be the most likely cause for these autopsy findings. Subcutaneous hemorrhages in the back without muscular hemorrhages around the scapula is a characteristic finding of "bathtub deaths". Although this was a preliminary study, the presence of this finding may aid in clarifying the mechanism of bath-related deaths.
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