Simultaneous measurement of plantar pressure and shear forces in diabetic individuals
Simultaneous measurement of plantar pressure and shear forces in diabetic individuals
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DOI：
10.1016/s0966-6362(01)00176-x
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发表时间：
2002-02-01
期刊：
影响因子：
2.4
通讯作者：
Davis, BL
中科院分区：
文献类型：
--
作者：
Perry, JE;Hall, JO;Davis, BL
足底溃疡是一种糖尿病并发症，其潜在致病因素尚不完全清楚。当前工作的目标是同时记录足底压力和剪切力并检查这些力的相互关系；具体来说，峰值剪切力和压力是否发生在同一地点/时间，以及相邻的剪切力是否更有朝向或远离彼此的趋势。使用定制的 16 传感器阵列来记录 12 名神经性糖尿病患者在步态开始期间的前足剪切力和压力。受试者赤脚，传感器上覆盖着 5 毫米厚的 Minorplast 层。最大压力发生在内侧跖骨头（189 kPa），最大剪切力发生在外侧跖骨头（33 kPa）。剪切力的相互作用表明，足底组织的拉伸幅度大于其束状程度（24 kPa 与 12 kPa，所有区域的平均值）。确定了内侧-外侧和前后方向上的拉伸和聚束的正态分布。当结合考虑剪切力和压力时，一半的神经病个体的峰值剪切力和压力发生在同一部位。这些峰值应力并非同时出现（平均相差 0.186 秒）。这项研究的结果有助于进一步表征神经性糖尿病个体在步态开始期间足底表面所经历的组织应力。 (C) 2002 Elsevier Science B.V. 保留所有权利。
Plantar foot ulceration is a diabetic complication whose underlying causative factors are still not fully understood. The goal of the current work was to simultaneously record plantar pressure and shear and examine the interrelationship of these forces; specifically, if peak shear and pressure occurred at the same site/time and whether adjacent shear forces had a greater tendency to be directed towards or away from each other. A custom built 16 transducer array was used to record forefoot shear and pressure during gait initiation in a cohort of 12 neuropathic diabetic individuals. The individuals were barefoot and the transducers were covered with a 5 mm thick layer of Minorplast. The greatest pressure occurred in the medial metatarsal heads (189 kPa) and the greatest shear in the lateral metatarsal heads (33 kPa). The interaction of the shear forces revealed that the plantar tissue was stretched to a greater magnitude than it was bunched (24 kPa vs 12 kPa, averaged over all regions). Normal distributions were determined for stretching and bunching in both the medial-lateral and anterior-posterior directions. When shear and pressure were considered in combination, half of the neuropathic individuals had peak shear and pressure Occurring at the same site. These peak stresses did not occur at the same time (average difference of 0.186 s). The results of this Study help to further characterize tissue stresses experienced on the plantar surface of the foot during gait initiation in neuropathic diabetic individuals. (C) 2002 Elsevier Science B.V. All rights reserved.