PDF(Pubmed)
Abstract：
Seat pressure measurements in wheelchair users have been available for some time; however, repeated measurements from a commercially available pressure mat over 90 min did not differ in the pressure-loaded measurement area or the coordinates of the center of pressure, even in participants who were able to reposition themselves in the wheelchair. The question therefore arises: to what extent are there other parameters that reflect the activity of wheelchair users with the pressure mat? To investigate this, a commercial pressure mat (BodiTrak®) was used to perform the measurements of pressure of 33 adult wheelchair-dependent people with spinal cord injury after 30 and 90 min sitting on the cushion. In addition to the standard output of the pressure mat, graph-based surface analyses (calculation of the area of maximum pressure, calculation of the pressure-loaded measurement area, and pressure-area ratio) was performed retrospectively using Python 3.7. The analysis of the measurements after 30 and 90 min was performed by distinguishing the participants between those who could actively change their position (N = 24) and those who could not (N = 9). The parameters of the pressure mat and the graph-based analyses remained unchanged for active participants. In participants who were unable to actively change their position, the area of maximum pressure and the pressure-area ratio (ratio of maximum pressure area and total pressure-loaded area) increased. Significant differences between minutes 30 and 90 are only found for the pressure-area ratio. Thus, when measuring the seat pressure of wheelchair users, the pressure-area ratio should be taken into account as it reflects the daily relief activities of wheelchair users.
摘要：
轮椅使用者的座椅压力测量已经有一段时间了；然而，在90分钟内对市售压力垫进行重复测量，在压力负荷测量区域或压力中心坐标上没有差异，即使是能够在轮椅上重新定位自己的参与者。Thereforethequestionarises:towhatextentarethereotherparametersthatreflecttheactivityof轮椅userswiththepressuremat?Toinvestigatethis,使用商业压力垫(BodiTrak®)对33名成年轮椅依赖的脊髓损伤患者在坐垫30和90分钟后的压力进行测量。除了压力垫的标准输出，基于图形的表面分析(最大压力面积的计算，压力加载测量面积的计算，和压力-面积比）使用Python3.7进行回顾性检查。30和90分钟后的测量分析是通过区分那些可以积极改变其位置的参与者（N=24）和那些不能改变其位置的参与者（N=9）来进行的。对于活跃参与者，压力垫的参数和基于图形的分析保持不变。在无法积极改变立场的参与者中，最大压力面积和压力面积比（最大压力面积与总压力负荷面积之比）增加。在30分钟和90分钟之间的显著差异仅在压力-面积比下发现。因此，测量轮椅使用者的座椅压力时，应考虑压力面积比，因为它反映了轮椅使用者的日常救援活动。
