螺旋CT重建在寰枢椎损伤法医鉴定中的应用

目的探讨螺旋CT重建技术对寰枢椎损伤的诊断价值。方法分析25例患者的螺旋CT重建图像,并与CT平扫、X线片比较。结果7例齿状突骨折中,X线显示4例,CT显示5例,CT重建确诊7例,且清楚显示骨折移位情况;6例X线、CT显示寰枢椎左右间隙不对称,通过CT重建排除寰枢关节半脱位;寰枢外侧关节脱位1例,CT重建可清楚显示,而X线片和CT平扫均未能显示;寰枢椎畸形3例,分别为齿状突、后弓缺如1例,齿状突发育不良2例,CT重建均能清楚显示,而X线、CT均误诊为齿状突骨折、寰枢椎半脱位。结论螺旋CT重建技术能够提供准确、完整的影像学信息,在寰枢椎损伤与畸形的诊断中具有重要应用价值。     

上海市道路交通事故受伤人员伤残分析

目的分析道路交通事故伤残的特征,为制定和修改伤残鉴定标准和相关法规提供参考。方法对上海市因道路交通事故受伤,2005年经法医评定构成伤残的案例资料进行回顾性分析。结果伤残部位以肢体最多（53.3%）,其次为头部（23.3%）,脊柱（9.7%）,胸部（5.8%）和腹部（4.4%）。2005年上海市交通事故年累积致残率为414.8/10万,男性（505.7/10万）高于女性（318.7/10万）,以35～59岁的致残率最高（538.2/10万）,60岁以上致残率呈现下降趋势（30.2/10万）。伤残者中交通方式以非机动车最多,其次为行人。结论2005年上海市道路交通伤致残率青壮年（35～59岁）最高,对社会经济和劳动力损失大。     

影像学技术与尸体解剖在致伤方式鉴定中的应用比较

目的探讨影像学技术在法医学死因鉴定、致伤方式分析研究中的应用范围。方法以真实高坠死亡案例为研究对象,分别运用多层螺旋CT平扫、三维重建和磁共振成像技术对尸体进行全面检查,随后即行系统尸体解剖,分别比较影像学技术与尸体解剖在关键信息和细节信息获取方面的优点和不足。结果对于损伤死亡案例,影像学技术可以收集损伤、骨折、出血等关键信息,且具有预先探知、显示非常规解剖部位微小损伤等优点,对于细节问题显示尚存在不足,某些技术的法医学应用尚需进一步磨合。结论影像学技术应用可在致伤方式鉴定中作为法医尸体解剖的指导和补充,在特定情况下可起到一定的替代作用。     

Fatal and Nonfatal Rip Saw Injuries

This paper deals with a fatal stab wound suffered by a 29-year-old man and nonfatal injuries of 35-year-old and 67-year-old saw operators. Rip saw is a machine that is specially designed for making a rip cut, a cut made parallel to the direction of the wood grain. Rip-saw-related injuries mostly occur when a person is struck by the cutting material, which usually involves splinters of irregular shape and diameter. When the splinter strikes the body diagonally, the injuries may include abrasions, lacerations, and cut wounds; in situations where the victim is struck directly, the most common injuries are oval- or star-shaped stab wounds with a varying width of abrasions around the wounds. Therefore, such injuries may come across as injuries produced by a knife-like instrument, which is an added difficulty in the interpretation of such injuries.     

外伤性黄斑裂孔法医学鉴定16例分析

目的 分析总结外伤性黄斑裂孔的特点,探讨法医学鉴定的要点及注意事项.方法 对2004-2009年在中国医科大学法医司法鉴定中心鉴定的16例外伤性黄斑裂孔案例进行回顾性分析.结果 16例外伤性黄斑裂孔均为闭合性眼球钝挫伤所致,以青年男性多见.裂孔可于伤后立即出现或间隔一段时间出现.伤后6个月,2例黄斑裂孔自发性闭合,12...     

小鼠皮肤切创愈合过程中纤维细胞募集和分化的时间依赖性

目的 观察小鼠皮肤切创愈合过程中,纤维细胞募集和分化随时间变化的规律性.方法 应用免疫荧光技术共定位纤维细胞[共表达CD45、Ⅰ型前胶原(procollagen Ⅰ)]和肌成纤维细胞[共表达CD45、平滑肌肌动蛋白(α-smooth muscle actin,α-SMA)],计数纤维细胞及其分化成的肌成纤维细胞.结果 ...     

Death certification of "suicide by cop"

Death certification of "suicide by cop" is controversial among some medical examiners and coroners. We present five such deaths that were certified as suicides and discuss the medico-legal issues involved with these certifications. To certify such a death as a suicide, certain criteria should be met. Suicide by cop is a circumstance that involves competing intentional acts that may result in dichotomous determinations of the manner of death. Despite the absence of direct self-infliction, there is overwhelming evidence that these five individuals intended to end their own lives. Their use of an unusual method to accomplish this goal may inappropriately result in a reflexive certification of homicide. All of the decedents possessed weapons or a facsimile of a weapon. We present five instances of suicide by cop and contend that these types of deaths are best certified as suicides.     

Gunshot residues on dry bone after decomposition-a pilot study

Abstract: Very little literature exists concerning radiochemical and microscopic analyses of gunshot wounds in decomposed material, and even less concerning skeletonized samples; the most advanced technologies may provide useful indications for the diagnosis of suspect lesions, especially if gunshot wounds are no longer recognizable. However, we know very little of the survival of gunshot residues (GSR) in skeletonized samples. This study examined nine gunshot wounds produced on pig heads which then underwent skeletonization for 4 years, and four gunshot entries on human heads from judicial cases which were then macerated to the bone in water; the samples underwent scanning electron microscopy coupled with energy dispersive X‐ray (SEM‐EDX) analysis. Positive results for GSR were observed only in four of the nine animal samples and in all four human samples. Among the human samples, two lesions showed Pb and Sb, one lesion only Pb, and one Pb, Sb, and Ba. This pilot study showed the survival of GSR in skeletal material and therefore the crucial importance of SEM‐EDX analyses on skeletonized material. Further studies are needed in order to ascertain the role of environmental modifications of GSR.     

Comparison of injuries caused by the pistols Tokarev,Makarov and Glock 19 at firing distances of 25, 50, 75 and 100 cm

Firings in the horizontal direction at cloth targets and at human skin from autopsy material were performed using the pistols 7.62 mm Tokarev (TT), 9 mm Makarov (PM) and 9 mm × 19 mm Glock 19 with common ammunition.     

Firearm Deaths by Law Enforcement

Abstract:  The use of deadly force during law enforcement is a matter that compels public scrutiny. There were 42 gunshot deaths caused by police over a 4-year period in New York City. The decedents' average age was 31 years and ranged from 17 to 64 years. There were 41 males and one female; and 26 Black, nine Hispanic, and seven White decedents. Ethanol and/or drugs of abuse were detected in 78% (31/40) of the decedents. The vast majority of shootings occurred with the police responding to a crime and 90% of the decedents were armed (26 handguns, six knives, one axe, one metal pipe, and one toy gun). Vehicles were used as weapons in two incidents. A total of 177 bullets struck the 42 decedents. Fourteen decedents sustained single gunshot wounds (GSWs), and the remainder had multiple GSWs ranging from 2 to 21. In the majority of the cases in this study, the number of GSWs of the body was three or fewer. Thirteen decedents had at least one GSW of the back or buttocks, accounting for 25 of the total 177 wounds, and four of the 13 had GSWs of only the back. With the exception of the upper extremities, GSWs of all locations were more likely to penetrate than perforate. Although these deaths may be high profile, the certification is typically straightforward and the cause (i.e., GSW) and manner of death (homicide) are readily apparent. Although police shootings in which the decedent was unarmed and/or sustained numerous GSWs are widely reported by the lay press, these types of shootings were not typical in our study.