电击兔肢体所致骨损伤后的实验性研究

目的220V交流电击兔肢体后,观察电击部位骨表面的病理改变,为法医病理诊断电击伤提供客观、量化的指标。方法用220V交流电作为损伤电压。动物分为:生前电击组、死后5m in电击组、腐败组及正常对照组。每组骨骼标本均进行肉眼检察、X线检测及SEM观察;同时运用能谱仪测量电击部位元素的种类及含量。结果①电击部位骨皮质SEM下骨皮质紊乱、小孔穴形成、周围高密度影环绕,且钙、磷元素升高,碳元素下降是诊断电击伤的指标,并能鉴别生前、死后电击伤及腐败骨。②小孔穴的形态及钙、磷、碳元素的变化可用于推断电击时间。结论电击造成骨组织的形态及电击部位元素的改变可作为鉴别生前、死后电击伤、腐败骨和推断电击时间的指标。

Experimental study of the bone in the injury of alternate current

Objective After the rabbits were electrocuted by 220V AC,we found that the pathological changes in the surface of the bones electrocuted could be one objective and quantitative index for the diagnosis of electrocution in the forensic pathology.Methods The experiment animals were divided into four groups,including: the antemortem electrical injury,postmortem electrical injury,putrefied and the normal.After specimens from each group being taken X ray examination,all specimens were then observed the morphological appearance of the surface of the bones with scanning electron microscopy(SEM),meanwhile,detected the kinds and contents of element in the electrical injury area with energy spectrum.Results①small holes on the surface of electrified area and the detection of contents of the elements in the high-density surrounding the holes could be a index for the diagnosis of AC injury and able to differentiate of the antemortem electrical injury,the postmortem electrical injury and the putrefied bones.②the morphologic changes of small holes and the alteration of the contents of elements such as calcium,phosphorus and carbon could be helpful to estimate the time of electrical injury.Conclusion The morphological appearances and the changes of elements in the surface of the bones electrocuted could be a useful index to analyse the differences among the antemortem electrical injury,postmortem electrical injury,putrefied and the normal bones.