基于脊柱矢状面曲线建立腰椎L4~5力学简化模型及其有效性验证  

Construction and Validation of Simplified Mechanical Model of L4-5 Lumbar Based on Sagittal Spinal Curve

作　　者：徐玉玲 严荣国[1] 郭田雨 颜丽琴 许任兴 张瀚文 XU Yuling;YAN Rongguo;GUO Tianyu;YAN Liqin;XU Renxing;ZHANG Hanwen(School of Health Science and Engineering,University of Shanghai for Science and Technology,Shanghai 20093,China)

机构地区：[1]上海理工大学健康工程与科学学院,上海200093

出　　处：《医用生物力学》2022年第6期1083-1087,共5页Journal of Medical Biomechanics

基　　金：上海介入医疗器械工程技术研究中心资助项目(18DZ2250900)。

摘　　要：目的 根据人体脊柱矢状面曲线建立腰椎L4~5活动节段力学简化模型,对该模型结构进行有效性验证与分析。方法 采用基于飞行时间测距原理的体外测量装置获取人体脊柱矢状面曲线,基于该曲线构建腰椎L4~5机械简化模型,并从关节活动度(range of motion, ROM)、椎间盘应力(intervertebral disc pressure, IDP)分布及小关节力(facet joint force, FJF)方面对模型有效性进行验证。结果 在0.2、0.4、0.6、0.8、1 kN随动载荷(follower load, FL)下模型最大IDP分别为0.23、0.46、0.69、0.92、1.15 MPa,纯扭矩下模型屈曲、后伸、侧屈及轴向扭转时ROM分别为6.61°、4.03°、3.30°、2.03°,在FL和扭矩共同作用下屈曲、后伸、侧屈及轴向扭转时IDP分别为1.80、1.00、1.36、0.80 MPa,后伸、侧屈及轴向旋转时FJF分别为79.60、29.49、94.64 N。结论 基于人体脊柱矢状面曲线构建的力学简化模型可用于脊柱矢状面曲线变化的脊柱力学分析。Objective To establish a simplified mechanical model of L4-5 movable lumbar segment according to the sagittal curve of human spine, and to verify and analyze validity of the model structure. Methods An in vitro measurement device based on the time-of-flight(ToF) distance measurement principle was used to obtain the sagittal curve of human spine. Based on the curve, the simplified mechanical model of L4-5 lumbar segment was constructed, and validity of the model was verified from the aspects of range of motion(ROM), intervertebral disc pressure(IDP) and facet joint force(FJF). Results The maximum IDP under 0.2, 0.4, 0.6, 0.8 and 1 kN follower load(FL) was 0.23, 0.46, 0.69, 0.92 and 1.15 MPa, respectively. The ROM of models during flexion, extension, lateral flexion and axial torsion under pure moment were 6.61°, 4.03°, 3.30° and 2.03°, respectively. The IDPs of models during flexion, extension, lateral flexion and axial torsion under the combined load of FL and moment were 1.80, 1.00, 1.36, 0.80 MPa, respectively. The FJFs of models during extension, lateral bending and axial rotation were 79.60, 29.49, 96.64 N, respectively. Conclusions The simplified mechanical model based on sagittal curve of human spine can be used for spinal mechanical analysis on changes in sagittal curve of the spine.

关 键 词：飞行时间测距 腰椎 机械模型 随动载荷 

分 类 号：R318.01[医药卫生—生物医学工程]