医用生物力学
醫用生物力學
의용생물역학
JOURNAL OF MEDICAL BIOMECHANICS
2009年
6期
458-461
,共4页
刘盛雄%尹志勇%赵辉%杨光瑜
劉盛雄%尹誌勇%趙輝%楊光瑜
류성웅%윤지용%조휘%양광유
减速碰撞%对冲伤%脑组织%受力特点
減速踫撞%對遲傷%腦組織%受力特點
감속팽당%대충상%뇌조직%수력특점
Deceleration impact%Contrecoup injury%Brain tissue%Mechanical style
目的 研究颅脑减速撞击过程中脑组织关键部位受力的特点(受拉或受压).方法 制作含气泡的透明颅脑物理模型,并将其固定在竖式颅脑减速撞击实验台上.将移动平台放置在400 mm的高度,自由下落并撞击固定台面,同时采用高速摄像记录整个减速撞击过程,并用序列图片分析软件对气泡长、短轴(分别位于垂直于撞击方向及撞击方向)的轴长变化进行分析.结果 撞击点处的气泡在短轴方向上的轴长变化大于长轴方向上的轴长变化,对冲点处的气泡在短轴方向上的轴长变化小于长轴方向上的轴长变化.结论 实验结果表明撞击点处的气泡所受到的作用力主要为压力且来自于短轴方向,即撞击方向;对冲点处的气泡所受到的作用力主要为拉力且来自于长轴方向,即撞击方向的垂直方向.该结果对于研究颅脑减速撞击致伤的力学机制及其诊断和防护具有重要意义.
目的 研究顱腦減速撞擊過程中腦組織關鍵部位受力的特點(受拉或受壓).方法 製作含氣泡的透明顱腦物理模型,併將其固定在豎式顱腦減速撞擊實驗檯上.將移動平檯放置在400 mm的高度,自由下落併撞擊固定檯麵,同時採用高速攝像記錄整箇減速撞擊過程,併用序列圖片分析軟件對氣泡長、短軸(分彆位于垂直于撞擊方嚮及撞擊方嚮)的軸長變化進行分析.結果 撞擊點處的氣泡在短軸方嚮上的軸長變化大于長軸方嚮上的軸長變化,對遲點處的氣泡在短軸方嚮上的軸長變化小于長軸方嚮上的軸長變化.結論 實驗結果錶明撞擊點處的氣泡所受到的作用力主要為壓力且來自于短軸方嚮,即撞擊方嚮;對遲點處的氣泡所受到的作用力主要為拉力且來自于長軸方嚮,即撞擊方嚮的垂直方嚮.該結果對于研究顱腦減速撞擊緻傷的力學機製及其診斷和防護具有重要意義.
목적 연구로뇌감속당격과정중뇌조직관건부위수력적특점(수랍혹수압).방법 제작함기포적투명로뇌물리모형,병장기고정재수식로뇌감속당격실험태상.장이동평태방치재400 mm적고도,자유하락병당격고정태면,동시채용고속섭상기록정개감속당격과정,병용서렬도편분석연건대기포장、단축(분별위우수직우당격방향급당격방향)적축장변화진행분석.결과 당격점처적기포재단축방향상적축장변화대우장축방향상적축장변화,대충점처적기포재단축방향상적축장변화소우장축방향상적축장변화.결론 실험결과표명당격점처적기포소수도적작용력주요위압력차래자우단축방향,즉당격방향;대충점처적기포소수도적작용력주요위랍력차래자우장축방향,즉당격방향적수직방향.해결과대우연구로뇌감속당격치상적역학궤제급기진단화방호구유중요의의.
Objective to research the mechanical style(compressive or tensile force)of the key site of brain tissue in brain deceleration impact.Method a transparent physical brain model with air bubbles was built and loaded on an upright brain decaler ation impacting expedmentel platform.Then,the moveable platform was made a free fall from a height of 400mm and impacted on the fixed platform,and the whole deceleration impacting process was recorded by a high-speed video camera.Using the serial pictures analyzing Software,the length change of the long ads(vertical to the impacting direction)and the short axis(in the impacting di-rection)of the air bubbles were analyzed and calculated.Result the length change of the long axis of air bub-ble with in site coup was smallerthan the absolute value of that of the short axis;while with the air bubble in the contrecoup site,the length change of the long axis was bigger than the absolute value of the short axis.Conclusions the results showed that the air bubble in the coup site mainly suffered from the tensile force vertical to the impacting direction and the air bubble in the contrecoup site mainly suffered from the compres-sive force in the impacting direction.Since the propeny of tensile resistance of the brain tissue is inferior to the property of compressive resistance of the brain tissue, the injury is often easier to occur in the contrecoup site than in coup site. The results were of significance to the research of biomechanical mechanism, diagnosis and prevention of the brain deceleration impacting injury.
