CAJ | 학술논문

目的建立颅脑枕部与地面接触碰撞的虚拟模型,探讨道路交通事故致行人中、重度颅脑损伤的生物力学机制. 方法利用临床病历资料分析道路交通事故致行人中、重度颅脑损伤的常见致伤方式和伤情特点,在Hypermesh软件中建立模拟常见致伤方式的有限元模型,用Ls-Dyna软件计算、分析颅内压力变化特点,并与伤情特点作对比分析. 结果行人中、重度颅脑交通伤以枕部接触碰撞致伤最为常见,特点是以撞击点对应的额、颞叶部位硬膜下出血、硬膜外出血和脑组织挫裂伤为主的"对冲伤".模拟分析结果显示,以右枕部为撞击点时,从右枕部到左额部.压缩力峰值逐渐减小,拉伸力峰值逐渐增大并在对冲部位的左额叶表面达到最大. 结论道路交通事故致行人中、重度颅脑损伤时,枕部接触碰撞最常见,额、颞叶组织拉伸变形和灰白质血管分布特点可能是发生"对冲伤"的主要生物力学机制.
목적 건립로뇌침부여지면접촉팽당적허의모형,탐토도로교통사고치행인중、중도로뇌손상적생물역학궤제. 방법 이용림상병력자료분석도로교통사고치행인중、중도로뇌손상적상견치상방식화상정특점,재Hypermesh연건중건립모의상견치상방식적유한원모형,용Ls-Dyna연건계산、분석로내압력변화특점,병여상정특점작대비분석. 결과 행인중、중도로뇌교통상이침부접촉팽당치상최위상견,특점시이당격점대응적액、섭협부위경막하출혈、경막외출혈화뇌조직좌렬상위주적"대충상".모의분석결과현시,이우침부위당격점시,종우침부도좌액부.압축력봉치축점감소,랍신력봉치축점증대병재대충부위적좌액협표면체도최대. 결론 도로교통사고치행인중、중도로뇌손상시,침부접촉팽당최상견,액、섭협조직랍신변형화회백질혈관분포특점가능시발생"대충상"적주요생물역학궤제.
Objective To study the mechanics of moderate and severe brain injury of pedestrians in road traffic accident by establishing the virtual model of impact occipital bone injury.Methods The clinical data were used to analyze comlnon mode and characteristics of moderate and severe brain injury of pedestrians.Then,the corresponding finite element model built by using Hypermesh software was used to to analyze the changes of intracranial pressures and compare with injury characteristics by using Ls-Dyna soft-ware. Results The conlmon injury mode of moderate and severe brain injury of pedestrians wag the con-tact impact of occiputal part,characterized by"eontrecoup injury",mainly including subdural hemorrhage,extradural hemorrhage and contusion in the opposite parts to the impact point.The simtdation resuhs showed that when the impact was at right occiputal bone.the peak value of condensing force decreased from the right occipital lobe.to the left frontal lobe,while the peak value of tension increased gradually and reached maximum at the surface of left frontal lobe. Conclusions Moderate and severe brain injury of pedestrian is commonly caused by impacting the occiputal bone in road traffic accident.The tension deformation in frontal or temporal lobes and the distribution of vessels in grey matter may be main biomeehanies leading to "contrecoup injury".