Investigation of peak pressure index parameters for people with spinal cord injury using wheelchair tilt-in-space and recline: methodology and preliminary report.
Investigation of peak pressure index parameters for people with spinal cord injury using wheelchair tilt-in-space and recline: methodology and preliminary report.
复制标题
使用轮椅倾斜空间和斜倚研究脊髓损伤患者的峰值压力指数参数：方法和初步报告。
DOI：
10.1155/2014/508583
复制
发表时间：
2014
影响因子：
--
通讯作者：
Jan,Yih-Kuen
中科院分区：
文献类型：
--
作者：
Lung,Chi-Wen;Yang,TimD;Crane,BarbaraA;Elliott,Jeannette;Dicianno,BradE;Jan,Yih-Kuen
本研究的目的是确定脊髓损伤（SCI）患者在不同程度的轮椅空间倾斜（倾斜）和斜倚情况下计算压力标测的峰值压力指数（PPI）时感觉窗位置和大小的影响。本研究共招募了13名电动轮椅使用者。参与者以随机顺序使用轮椅倾斜（15°，25°和35°）和倾斜（10°和30°）的六种组合。从标测系统的左侧提取峰值压力和压力中心的位移。针对三个传感器窗口维度（3个传感器× 3个传感器、5 × 5和7 × 7）计算归一化PPI。在倾斜和斜倚时观察到峰值压力的欧几里得位移至少为3.33 cm。对于每个倾斜角度，10°和30°后倾时的峰值压力位移无显著差异，而压力位移中心有显著差异（P<0.05）。对于每个后倾角，15°、25°和35°倾斜对之间的峰值压力位移没有显著差异，而15°与35°和25°与35°之间的压力位移中心显著不同。我们的研究表明，峰值压力位移发生在响应轮椅倾斜和斜倚，这表明，用于计算PPI的选择sensel窗口的位置应在轮椅配置的变化进行调整。
The purpose of this study was to determine the effect of the sensel window’s location and size when calculating the peak pressure index (PPI) of pressure mapping with varying degrees of wheelchair tilt‐in‐space (tilt) and recline in people with spinal cord injury (SCI). Thirteen power wheelchair users were recruited into this study. Six combinations of wheelchair tilt (15°, 25°, and 35°) and recline (10° and 30°) were used by the participants in random order. Displacements of peak pressure and center of pressure were extracted from the left side of the mapping system. Normalized PPI was computed for three sensel window dimensions (3 sensels × 3 sensels, 5 × 5, and 7 × 7). At least 3.33 cm of Euclidean displacement of peak pressures was observed in the tilt and recline. For every tilt angle, peak pressure displacement was not significantly different between 10° and 30° recline, while center of pressure displacement was significantly different (P< .05). For each recline angle, peak pressure displacement was not significantly different between pairs of 15°, 25°, and 35° tilt, while center of pressure displacement was significantly different between 15° versus 35° and 25° versus 35°. Our study showed that peak pressure displacement occurs in response to wheelchair tilt and recline, suggesting that the selected sensel window locations used to calculate PPI should be adjusted during changes in wheelchair configuration.