摘要
目的利用有限元分析方法研究髋残肢在支撑阶段与髋离断假肢接受腔生机界面的力学特性,为优化、设计髋接受腔结构提供理论依据,为评估髋接受腔舒适度提供研究基础。方法根据患者残肢CT扫描模型,采用逆向建模的方式,三维重建骨骼、软组织以及接受腔模型。利用有限元方法研究站立状态下残肢-髋接受腔界面正应力及剪切应力的分布情况,并通过设计压力采集模块系统进行验证。结果残肢与髋接受腔界面应力主要分布在腰部和残肢底部,位于残肢其余区域的界面应力则分布较为均匀。有限元计算结果和压力采集模块系统测量结果有较好的符合。结论为能较好实现髋接受腔功能传递性和安全舒适性,需要充分考虑残肢腰部和底部的受力以及残肢与接受腔的配合度。
Objective To study mechanical properties of the interface between hip residual limb and hip socket during the stance phase by using the finite element analysis(FEA) method, so as to provide the theoretical basis for structure optimization and design of hip socket, as well as the research basis for comfort evaluation of hip socket. Methods According to CT scan images of the patient’s residual limb, the model of bone, soft tissues and socket was reconstructed by reverse modeling. The distribution of normal stress and shear stress on the interface between hip residual limb and hip socket was analyzed and a pressure acquisition module system was designed to verify the stress distribution condition. Results The interfacial stress between hip residual limb and hip socket was mainly distributed in the waist and the bottom of the residual limb, and the interfacial stress was more evenly distributed in the rest of the residual limb. The results of finite element calculation were in good agreement with the system measurement results of pressure acquisition module. Conclusions In order to improve force transfer and safety and comfort of the hip socket, it is necessary to fully consider stress condition of the waist and bottom of the residual limb, as well as the coordination degree between residual limb and hip socket.
作者
钱玉
李新伟
何秉泽
赵敬
喻洪流
QIAN Yu;LI Xinwei;HE Bingze;ZHAO Jing;YU Hongliu(Institute of Rehabilitation Engineering and Technology,School of Medical Instrument and Food Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《医用生物力学》
CAS
CSCD
北大核心
2021年第6期923-928,共6页
Journal of Medical Biomechanics
基金
国家自然科学基金项目(61473193)。
关键词
髋离断
髋接受腔
有限元分析
界面应力
压力采集系统
hip disarticulation
hip socket
finite element analysis
interface stress
pressure acquisition system
