Brienza D M, Karg P E
Department of Rehabilitation Science and Technology, School of Health and Rehabilitation Sciences, University of Pittsburgh, PA, USA.
Arch Phys Med Rehabil. 1998 Apr;79(4):388-94. doi: 10.1016/s0003-9993(98)90138-1.
A method for designing tissue deformation minimizing seat surfaces was evaluated. Pressure and stiffness criteria were used to optimize surface shape. The method's efficacy for patients with spinal cord injuries (SCI) and a comparison of cushion performance and interface characteristics with a group of 30 elderly patients are presented.
Repeated measures, prospective study.
University medical center.
SCI (n=12), elderly (age 65 + years) [n=30].
One flat and two custom foam seat cushions.
Interface pressure measured using a pressure sensing pad; tissue stiffness and pressure recorded on a rigid programmable seat surface.
Pressure distributions on contoured cushions for the SCI group contained lower values than distributions on flat cushions. A comparison of the pressure data between the elderly and SCI showed that significant differences exist between interface characteristics. The SCI group had higher peak interface pressures for all cushions tested. Tissue stiffness measurements were similar for each group.
Results showed improved effectiveness of custom contoured foam seat cushions versus flat foam cushions. The results suggest that pressure distributions for SCI are more sensitive to support cushion characteristics than for the elderly. Further research is needed to determine the extent of the difference between the populations represented by these groups.
评估一种设计能使组织变形最小化的座椅表面的方法。使用压力和刚度标准来优化表面形状。介绍了该方法对脊髓损伤（SCI）患者的有效性，以及与一组30名老年患者的坐垫性能和界面特征的比较。
重复测量的前瞻性研究。
大学医学中心。
SCI患者（n = 12），老年人（年龄65岁及以上）[n = 30]。
一个平的和两个定制泡沫坐垫。
使用压力感应垫测量界面压力；在刚性可编程座椅表面记录组织刚度和压力。
SCI组轮廓坐垫上的压力分布值低于平坐垫上的压力分布值。老年人和SCI患者之间的压力数据比较表明，界面特征存在显著差异。SCI组在所有测试坐垫上的峰值界面压力更高。每组的组织刚度测量结果相似。
结果表明定制轮廓泡沫坐垫比平泡沫坐垫更有效。结果表明，SCI患者的压力分布比老年人对支撑坐垫特征更敏感。需要进一步研究以确定这些组所代表的人群之间差异的程度。
