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Incised wound margins caused by steel blades. Scanning electron microscopy to determine wound direction
Abstract:
The aim of this paper has been to check the diagnostic ability of Scanning Electron Microscopy (S.E.M.) to determine wound direction. We have studied incised wound margins caused by steel blades in human skin samples from cadavers by S.E.M. It was found that a lateral accessory tail existed in 65% of the entrance edges. This finding was recorded in all the cases when wound direction was perpendicular to Lancer's lines of the skin area in which the wound was located. No similar finding in the exit tails was noticed. The depth and length of the wound margins was less accurate an index of the wound direction than a lateral accessory tail. We think that this finding could be useful in determining the entrance margin in incised wounds.
Insights
Scanning Electron Microscopy (SEM) can identify lateral accessory tails on incised wound edges, aiding in determining the entrance point. This finding is crucial for forensic analysis of stab wounds.
Area of Science:
- Forensic pathology
- Dermatology
- Materials science
Background:
- Determining the directionality of incised wounds is critical in forensic investigations.
- Traditional methods relying on wound depth and length can be unreliable.
- Scanning Electron Microscopy (SEM) offers high-resolution imaging for detailed analysis.
Purpose of the Study:
- To evaluate the diagnostic capability of SEM in determining wound direction.
- To investigate the presence and significance of specific morphological features at wound margins.
Main Methods:
- Human cadaver skin samples with incised wounds from steel blades were examined.
- Scanning Electron Microscopy (SEM) was employed to analyze wound margins.
- Morphological features, including lateral accessory tails, were documented and correlated with wound direction.
Main Results:
- A lateral accessory tail was observed in 65% of the entrance edges of incised wounds.
- The presence of these tails strongly correlated with wounds perpendicular to skin lines (Langer's lines).
- No similar structures were found at the exit wound margins.
- Wound depth and length were less accurate indicators of direction compared to lateral accessory tails.
Conclusions:
- The presence of a lateral accessory tail is a reliable indicator of the entrance margin in incised wounds.
- SEM analysis of wound margins, specifically identifying lateral accessory tails, can significantly aid in determining wound directionality.
- This technique offers a valuable tool for forensic wound analysis.