PMCT对缢死尸体真空现象及鉴定价值研究

Study on vacuum phenomenon and identification value of PMCT in hanged corpses

目的比较缢死尸体与其他死因尸体的PMCT影像,探讨真空现象在缢死案例中的应用。方法筛选符合条件的且死因为缢死的尸体影像和其他死因的尸体影像进行对照,观察胸锁关节、锁骨周围软组织、椎间盘内以及舌骨周围软组织内有无气体密度影,观察舌骨有无骨折。结果缢死组舌骨骨折、舌骨旁软组织内真空现象、椎间盘内真空现象、胸锁关节内真空现象、锁骨周围软组织内真空现象的发生率均高于对照组。结论真空现象并非是物理意义上的真空,而是由组织内的气体聚积形成;真空现象在椎间盘中部出现可作为尸体缢吊时椎体受重力影响过度纵向拉伸的依据;真空现象在软组织中出现可以作为软组织受周围外力作用的依据或者肺部过度通气的证据。

Objective Compare PMCT images of hanged corpses with other causes of death,and explore the application of vacuum phenomenon in hanging cases.Methods The images of hanged cadavers that meet certain conditions were compared with other causes of death.Observe and record the presence of gaseous density shadows in the sternoclavicular joint,soft tissue around the clavicle,intervertebral disc,tissues around the hyoid bone and record the appearance of the hyoid bone fracture.Result The ratio of hyoid fracture,perihyoid soft tissue vacuum phenomenon,intervertebral disc vacuum phenomenon,sternoclavicular joint vacuum phenomenon and periclavicular soft tissue vacuum phenomenon was higher in the hanged group than in the control group.Conclusion The vacuum phenomenon is not a physical vacuum,but formed by the accumulation of gas in the tissue.The appearance of the vacuum phenomenon in the intervertebral disc can be used as a basis for the influence of gravity when the corpse is suspended.The appearance of vacuum phenomenon in soft tissues can be used as a basis for soft tissue to be affected by surrounding external forces or evidence of hyperventilation of the lungs.