Measurement and finite element analysis of the load-dependent pressure redistribution behavior of various types of mattresses
Measurement and finite element analysis of the load-dependent pressure redistribution behavior of various types of mattresses
复制标题
各类床垫随负载变化的压力重新分布行为的测量和有限元分析
DOI：
10.1142/s0219519420500311
复制
发表时间：
2020
影响因子：
0.8
通讯作者：
H. Yamada
中科院分区：
文献类型：
--
作者：
Y. Fuwa;W. Z. W. Hasan;H. Yamada
在评估床垫压力重新分布时，必须记住负荷依赖性，以防止在骨性压迫处发生压疮。然而，目前还没有标准化的方法来分析床垫压力重新分布后的荷载相关行为。在这项研究中，一个简单的负载传感机制的便携式掌上设备被开发用于测量由一个突出的轴所施加的平均压力，由一个圆盘包围的低弹性聚氨酯（LRPu）泡沫，乳胶泡沫，椰子纤维和乳胶（CFL）床垫，以及聚氨酯（PU）泡沫床和LRPu泡沫床垫放在床上。采用有限元分析方法对接触压力和变形进行了详细的分析。LRPu泡沫床垫的压力重新分布最大，使用硬聚氨酯泡沫制成的床垫可以避免过度压缩。有限元分析表明，接触压力显着增加附近的外圆周的突出轴和周围的光盘。根据器械的边缘和底部几何形状，压力明显不均匀。测量和有限元分析揭示了负载相关的压力重新分布行为，这应该允许床垫根据个人的基础上定制。
Load dependence must be kept in mind when evaluating mattress pressure redistribution, to prevent the development of pressure ulcers at bony prominences. However, there is no standardized method for analyzing load-dependent behavior after mattress pressure redistribution. In this study, a portable palmtop device with a simple load-sensing mechanism was developed for measuring the mean pressure exerted by a protruding shaft surrounded by a disc on low-resilience polyurethane (LRPu) foam, latex foam, coconut fiber and latex (CFL) mattresses, as well as polyurethane (Pu) foam bed and an LRPu foam mattress laid on a bed. Finite element (FE) analysis was used to analyze deformation and contact pressure in detail. The pressure redistribution was greatest for the LRPu foam mattress, and excessive compression was avoided by using an underlay made of stiff Pu foam. FE analysis revealed that the contact pressure increased significantly near the outer circumference of the protruding shaft and the surrounding disc. Significant nonuniformity in pressure was evident, according to the edge and bottom geometry of the device. The measurements and FE analysis revealed load-dependent pressure redistribution behavior, which should allow mattresses to be tailored on an individual basis.