Finite Element Analysis of Donning Procedure of a Prosthetic Transfemoral Socket
Finite Element Analysis of Donning Procedure of a Prosthetic Transfemoral Socket
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DOI：
10.1007/s10439-011-0389-z
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发表时间：
2011-12-01
影响因子：
3.8
通讯作者：
Ramirez Patino, Juan Fernando
中科院分区：
文献类型：
--
作者：
Lacroix, Damien;Ramirez Patino, Juan Fernando
下肢截肢对患者来说是一个严重的心理和生理事件。可以提供假体解决方案，但应响应患者特定的需要，以适应几何和生物力学的特殊性。本文提出了一种计算5例经股截肢患者股骨窝与残端相互作用时应力-应变状态的新方法。在本研究中，使用基于CT和激光扫描数据获得的患者特定几何形状的显式有限元方法对套孔戴上过程进行建模。树桩上纵向和周向的平均最大压力分别为4 kPa （SD 1.7）和1.4 kPa (SD 0.6)，平均最大剪应力为0.6 kPa （SD 0.3）。最大值的位置根据插座上的压力区域而定。在本研究中获得的应力-应变状态可以被认为比其他的更可靠，因为有正常和切向应力与套接过程有关。
Lower limb amputation is a severe psychological and physical event in a patient. A prosthetic solution can be provided but should respond to a patient-specific need to accommodate for the geometrical and biomechanical specificities. A new approach to calculate the stress-strain state at the interaction between the socket and the stump of five transfemoral amputees is presented. In this study the socket donning procedure is modeled using an explicit finite element method based on the patient-specific geometry obtained from CT and laser scan data. Over stumps the mean maximum pressure is 4 kPa (SD 1.7) and the mean maximum shear stresses are 1.4 kPa (SD 0.6) and 0.6 kPa (SD 0.3) in longitudinal and circumferential directions, respectively. Locations of the maximum values are according to pressure zones at the sockets. The stress-strain states obtained in this study can be considered more reliable than others, since there are normal and tangential stresses associated to the socket donning procedure.