Amputee socks: how does sock ply relate to sock thickness?
Amputee socks: how does sock ply relate to sock thickness?
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DOI：
10.1177/0309364611431290
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发表时间：
2012-03-01
影响因子：
1.5
通讯作者：
Karchin, Ari
中科院分区：
文献类型：
--
作者：
Sanders, Joan E.;Cagle, John C.;Karchin, Ari
背景：术语“袜子层”可能是假肢实践中的一个混淆来源，因为袜子层和袜子厚度之间可能没有一致的关系。 目的：本研究的目的是表征肢体假肢中常用的不同袜子材料的袜子层与袜子厚度之间的关系。我们还评估了与无压力条件下佩戴下肢假肢时所经历的负载条件下袜子厚度的变化。研究设计：实验。机械评估。方法：使用定制仪器测试七种不同层数和护套的袜子材料。测量了八种不同压应力条件和两种不同双轴面内拉伸应变条件下的袜子厚度。结果：对于由单一材料编织的袜子，步行站立阶段条件下的厚度对于 1、3 和 5 层而言平均分别为 0.7、1.2 和 1.5 毫米。对于由多种材料编织的袜子，相应的结果分别为0.4、0.7和0.8毫米。袜子层没有总和，例如3 层袜子的厚度不是 1 层袜子厚度的三倍。结论：袜子厚度和压缩刚度很大程度上取决于袜子材料、界面压力和面内双轴应变。
Background: The term 'sock ply' may be a source of confusion in prosthetics practice because there may not be a consistent relationship between sock ply and sock thickness.Objectives: The purpose of this study was to characterize how sock ply related to sock thickness for different sock materials commonly used in limb prosthetics. We also evaluated how sock thickness changed under loading conditions experienced while wearing a lower limb prosthesis compared with unstressed conditions.Study Design: Experimental. Mechanical assessment.Methods: Seven sock materials of varying ply and sheaths were tested using a custom instrument. Sock thickness under eight different compressive stress conditions and two different biaxial in-plane tensile strain conditions were measured.Results: For socks woven from a single material, thickness under walking stance phase conditions averaged 0.7, 1.2 and 1.5 mm for 1, 3 and 5-ply, respectively. For socks woven from several materials, the corresponding results were 0.4, 0.7 and 0.8 mm, respectively. Sock ply did not sum, e.g. a 3-ply sock was not three times the thickness of a 1-ply sock.Conclusions: Sock thickness and compressive stiffness are strongly dependent upon sock material, interface pressure, and in-plane biaxial strain.