Suicide by Shotgun in Southeastern Minnesota

Suicide by shotgun is a common method of suicide with high regional variation. We sought to describe their distinct, challenging features and provide demographic and risk characteristics. We reviewed 228 gunshot wounds autopsied at Mayo Clinic from 1994 to 2014; of these, 75 (32.9%) were shotgun wounds. All were suicides and contact range. Ages ranged from 14 to 92 years old; of these, 97% were men. The majority involved the head (70.9%), were intraoral (48.2%), and had upward (73.2%) and backward (73.2%) directionality. Next most common was the chest (21.5%), with backward (94.1%) and downward (64.7%) directionality. Four involved multiple wounds. Wadding was recovered in 16 (21.3%) cases. Six (8.0%) had a survival period. Most (66.7%) took place at home. Seventy‐one percent had a known psychiatric history; 32.4% had positive toxicology. Although contact range shotgun wounds cause severe destruction, entrance wound and other characteristic are identifiable with thorough scene, autopsy, and radiographic documentation.     

4种影像学检查方法应用于肩关节损伤法医学鉴定的比较

目的 评价X线、CT、MRI及CT气-碘双对比造影4种方法在肩关节损伤法医学鉴定中的应用价值.方法通过对肩关节损伤患者行X线摄片、CT扫描、MRI成像与CT气-碘双对比造影检查,观察、分析4种方法所得的影像学资料.结果 X线摄片对骨折的诊断率为52.8%,对软组织损伤的诊断率为0%;CT对骨折的诊断率为72.0%.对软...     

Multiple Self‐Inflicted Stab Wounds to Neck,Chest and Abdomen as a Unique Manner of Suicide

Abstract: This is a case report of a 30‐year‐old man found dead in his flat lying on the floor with multiple stab wounds over the body, surrounded by an extensive volume of blood. Examination of the scene of death showed a secure flat, locked from inside. A blood‐stained knife was present close to the body and two unstained notes left on the sofa at the locus. A small plastic bag containing white powder (which following toxicological examinations appeared to be cocaine) and an almost full bottle of beer were present on a table. Autopsy revealed more than 40 stab wounds to neck, chest, and abdomen arranged in isolated groups within which the wounds showed similar directions and had a transverse orientation. Together with hesitation marks located on the neck and wrists these characteristics allowed to interpret this case as a suicide.     

道路交通事故二次损伤致死17例分析

目的探讨道路交通事故二次损伤致死的法医学鉴定思路和要点。方法收集17例道路交通事故二次损伤致死的案例,通过事故现场勘验和尸体检验收集交通事故发生的基本信息以及损伤分布、性质等资料。根据收集的信息,重建事故发生过程,明确死者的致伤过程,分析损伤的致伤方式和机制、损伤的严重程度,判断属生前伤抑或死后伤,明确死者的死亡原因。结果道路交通事故二次损伤致死案例存在损伤严重,多发伤与复合伤常见,生前伤、濒死伤与死后伤并存,致伤方式多样,致伤机制复杂,甚至多次损伤相互掩盖等特点。结论道路交通事故二次损伤致死的法医学鉴定需结合事故现场勘验、尸体检验等综合分析和判断。     

Effects of Decomposition on Gunshot Wound Characteristics: Under Cold Temperatures with No Insect Activity

Abstract:  Information on gunshot wound characteristics has been well documented; however, there is little documented information on the effects of decomposition or environmental conditions on gunshot wound characteristics. This study was conducted in order to determine if decomposition would obscure or alter the physical surface characteristics of gunshot wounds when exposed to a low temperature environment. The study was conducted from November 2005 to January 2006 in Nova Scotia, Canada in forested and exposed environments, with air temperatures between −10°C and +10°C. Pigs were used as human models and were shot six times each at three different ranges (contact, 2.5 cm, and 1.5 m). Gunshot wound characteristics persisted until the wounds were covered with ice and snow, after which changes were observed. The changes were recognized as being unique to the different ranges of gunshots and it was concluded that changes due to decomposition under the conditions tested would not affect the collection and interpretation of gunshot wound evidence.     

574例高坠死亡案件分析

目的通过对大量高坠死亡案件的现场分析、尸体的损伤形态学观察并结合案情调查资料,构建高坠案件法医病理学案例库,为研究疑难坠落死亡案件奠定基础。方法收集并回顾分析5省市574例高坠死亡案件资料,包括死者个人信息、现场勘查资料、尸检结果、精神疾病史和毒物检验结果。结果男性的意外死亡率明显高于女性;在0～10岁年龄组未见自杀案例;在60岁以上年龄组,自杀率明显高于意外死亡;大多数的意外案例都发生在工作地点;坠落高度在10m以下的案例中,落地最先接触部位以头部居多,而在10～25m高度,足或下肢多见。结论大多数高坠案例都有明确的结论,但部分案例成伤机制及死亡方式判断呈现明显分歧,应为今后坠落伤研究的重点方向。     

146例体表损伤类型与致伤物分析

目的 探讨致伤物推断的法医学鉴定及其鉴定意见的证据价值.方法 收集1998-2007年间皖南医学院司法鉴定中心受理的致伤物推断案件146例,通过人体体表损伤特征的分析,推断致伤物.并通过推断致伤物与实际致伤物的比较,分析致伤物推断的准确性. 结果根据锐器伤推断致伤物的准确性要比根据钝器伤推断致伤物的准确性高.结论 致伤物推断结果尚存在一定的不确定性,必须结合其他证据,才能作为定案的依据.     

碱性成纤维细胞生长因子及其受体在脑损伤时的表达和应用

bFGF是一种广泛存在的多功能肽类生长因子,具有神经营养及促创伤修复功能.脑损伤可诱导bFGF及其特异性受体的表达,表明bFGF参与了CNS损伤后神经细胞的存活与损伤组织的修复过程,具有一定的治疗价值,同时其表达的时序性改变可作为一种客观指标用于法医学脑损伤时间的推断.     

The Impact of the 1994 Federal Assault Weapon Ban on Gun Violence Outcomes: An Assessment of Multiple Outcome Measures and Some Lessons for Policy Evaluation

The Federal Violent Crime Control and Law Enforcement Act of 1994 bans a group of military-style semiautomatic firearms (i.e., assault weapons) and ammunition magazines capable of holding more than 10 rounds. Ban advocates argue that these weapons are particularly dangerous because they facilitate the rapid firing of high numbers of shots. Though the banned guns and magazines were used in only a modest fraction of gun crimes before the law, it was hypothesized that a decrease in their use might reduce gunshot victimizations, particularly those involving multiple wounds and/or victims. In response to a Congressional mandate for an impact assessment of the law, this study utilized national and local data sources and a variety of analytical techniques to examine the ban's short-term impact on gun violence. The ban may have contributed to a reduction in gun homicides, but a statistical power analysis of our model indicated that any likely impact from the ban will be very difficult to detect statistically for several more years. We found no evidence of reductions in multiple-victim gun homicides or multiple-gunshot wound victimizations. The findings should be treated cautiously due to the methodological difficulties of making a short-term assessment of the ban and because the ban's long-term effects could differ from the short-term impacts revealed by this study.