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Lower Extremity Injury Criteria for Evaluating Military Vehicle Occupant Injury in Underbelly Blast Events

机译:评估下肢爆炸事件中军车乘员伤害的下肢伤害标准

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摘要

Anti-vehicular (AV) landmines and improvised explosive devices (IED) have accounted for more than half of the United States military hostile casualties and wounded in Operation Iraqi Freedom (OIF) (Department of Defense Personnel & Procurement Statistics, 2009). The lower extremity is the predominantly injured body region following an AV mine or IED blast accounting for 26 percent of all combat injuries in OIF (Owens et al., 2007). Detonations occurring under the vehicle transmit high amplitude and short duration axial loads onto the foot-ankle-tibia region of the occupant causing injuries to the lower leg. The current effort was initiated to develop lower extremity injury criteria for occupants involved in underbelly blast impacts. Eighteen lower extremity post mortem human specimens (PMHS) were instrumented with an implantable load cell and strain gages and impacted at one of three incrementally severe AV axial loading conditions. Twelve of the 18 PMHS specimens sustained fractures of the calcaneus, talus, fibula and/or tibia. The initiation of skeletal injury was precisely detected by strain gages and corresponded with local peak axial tibia force. Survival analysis identified peak axial tibia force and impactor velocity as the two best predictors of incapacitating injury. A tibia axial force of 5,931 N and impactor velocity of 10.8 m/s corresponds with a 50 percent risk of an incapacitating injury. The criteria may be utilized to predict the probability of lower extremity incapacitating injury in underbelly blast impacts. [PUBLICATION ABSTRACT]
机译:伊拉克自由行动(OIF)中,反车辆(AV)地雷和简易爆炸装置(IED)占了美国军事敌对人员伤亡的一半以上(国防人员与采购统计部,2009年)。下肢是在AV地雷或IED爆炸后主要受伤的身体部位,占OIF所有战斗伤害的26%(Owens等,2007)。车辆下方发生的爆炸将高振幅和短时的轴向载荷传递到乘员的脚踝胫骨区域,从而导致小腿受伤。当前的工作是着手为涉及腹部爆破冲击的乘员制定下肢损伤标准。用可植入的称重传感器和应变计对18个下肢验尸人体标本(PMHS)进行仪器测试,并在三种递增的严重AV轴向负荷条件之一下进行冲击。 18个PMHS标本中有12个持续发生了跟骨,距骨,腓骨和/或胫骨骨折。应变计可精确检测出骨骼损伤的发生,并与局部峰值胫骨胫骨力相对应。生存分析确定最大的胫骨轴向力​​和撞击器速度是无行为能力损伤的两个最佳预测指标。胫骨轴向力​​为5,931 N,冲击器速度为10.8 m / s,相应的伤残风险为50%。该标准可被用来预测下腹部爆炸冲击中下肢无能力伤害的可能性。 [出版物摘要]

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  • 来源
    《Stapp Car Crash Journal》 |2009年第1期|p.229-249|共21页
  • 作者

    Brian J McKay Cynthia A Bir;

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    Brian J. McKay and Cynthia A. BirWayne State UniversityAddress correspondence to Brian J. McKay, Wayne State University Bioengineering Center, 818 W. Hancock, Detroit, MI 48201. Electronic mail: bmckay@wayne.edu;

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