Shear stress measured on beds and wheelchairs.
Shear stress measured on beds and wheelchairs.
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在床和轮椅上测量剪切应力。
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
A. Holman
中科院分区：
文献类型：
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作者：
R. Goossens;C. Snijders;T. Holscher;W. Heerens;A. Holman
局部剪切被认为是压疮发展的主要风险因素之一。需要一种能够测量皮肤和可变形材料之间的剪切力而不干扰剪切现象的小型可变形传感器。在本研究中，引入了一种新的剪切传感器，接触面积为4.05平方厘米。对10名健康的年轻受试者进行了一系列验证实验。结果表明，对于前倾座椅，皮肤和传感器垫之间的局部剪切力之和等于用测力板测量的合成剪切力。该结果可作为新传感器的验证。当坐在轮椅上时，所记录的剪切值在纵向方向上为4.8kPa，在横向方向上为8.5kPa，而当在床上以坐姿时，在医院病床的床垫上，所记录的剪切值在纵向方向上为5.6kPa，在横向方向上为3.1kPa。
Local shear is understood to be one of the principal risk factors for the development of pressure sores. There is a need for a small deformable sensor that can measure the shear force between skin and deformable materials without disturbing the shear phenomenon. In the present study a new shear sensor is introduced with a contact area of 4.05 cm2. A series of validation experiments was performed with ten healthy young subjects. It was demonstrated that with a forward-tilted seat, the sum of the local shear forces between skin and sensormat is equal to the resultant shear force measured with a force plate. This result serves as a validation of the new sensor. The shear values recorded are 4.8 kPa in the longitudinal direction and 8.5 kPa in the transversal direction while sitting in a wheelchair, and 5.6 kPa in the longitudinal direction and 3.1 kPa in the transversal direction on a mattress of a hospital bed, while in sitting position in bed.