Pounder Derrick J, Cormack Lesley
Centre for Forensic and Legal Medicine, University of Dundee, Dundee, Scotland, United Kingdom.
Am J Forensic Med Pathol. 2011 Mar;32(1):90-2. doi: 10.1097/paf.0b013e3181edf2de.
Stab wounds produced by serrated blades are generally indistinguishable from stab wounds produced by non-serrated blades, except when visible tool mark striations are left on severed cartilage. We explored the possibility that similar striations may be produced on the soft tissues of internal organs. Loin of beef, bovine kidney, and pig heart, liver, and aorta were each stabbed 20 times with a coarsely serrated blade. The walls of the stab tracks were exposed and documented by photography, cast with dental impression material, and the casts photographed. Striations were identified in all of the tissues in every stabbing, but their consistency and quality varied between tissues. Striations were most easily seen in liver, heart, and aorta. Tool mark striations in soft tissues other than cartilage have not been described in homicidal stabbings, likely because they have not been sought. We suggest that the walls of stab wound tracks should be exposed, and tissue striations should be sought as a means of identifying the weapon as having a serrated blade.
锯齿状刀片造成的刺伤通常与非锯齿状刀片造成的刺伤难以区分，除非在切断的软骨上留下可见的工具痕迹条纹。我们探讨了在内部器官软组织上产生类似条纹的可能性。用一把粗锯齿状刀片分别在牛腰肉、牛肾以及猪心、肝和主动脉上刺20次。刺伤通道的壁暴露后拍照记录，用牙科印模材料浇铸，然后对铸模拍照。在每次刺伤的所有组织中都发现了条纹，但不同组织之间条纹的一致性和质量有所不同。在肝脏、心脏和主动脉中最容易看到条纹。在杀人刺伤中，除软骨外的软组织上的工具痕迹条纹尚未被描述，可能是因为此前没有去寻找。我们建议，应暴露刺伤通道的壁，并寻找组织条纹，以此作为识别凶器为锯齿状刀片的一种方法。
