Bar C A
Rehabilitation Engineering Section, Rookwood Hospital, Cardiff, UK.
Prosthet Orthot Int. 1991 Dec;15(3):232-40. doi: 10.3109/03093649109164293.
Reduction of pressures generated in the tissues overlying the ischial tuberosities is an important measure for predicting a cushion's effectiveness. In particular, the pressure-time relationship is significant in the prevention of pressure sores. In this study a dynamic pressure monitoring system was used to obtain pressure-time profiles for 25 spinal cord injured subjects. Each subject tested three types of cushion (Foam, Gel (Aberdeen) and Roho) for periods of two hours each during which routine activities were performed. Results obtained were broadly comparable with previous studies. Average pressures were: Foam 87.6mmHg (11.6kPa); Gel 68.6mmHg (9kPa) and Roho 54.6mmHg (6.7kPa). Pressure-time histograms are presented for three subjects for each cushion. These show inter-subject variability on the same cushion as well as intra-subject variability on different cushions. Therefore individual patient assessment is important in providing the most appropriate cushion. Dynamic pressure monitoring allows the pattern of pressure variation to be determined and hence the potential effectiveness of the cushion.
降低坐骨结节上方组织所产生的压力是预测坐垫有效性的一项重要措施。特别是，压力-时间关系对于预防压疮具有重要意义。在本研究中，使用了一种动态压力监测系统来获取25名脊髓损伤受试者的压力-时间曲线。每位受试者对三种类型的坐垫（泡沫坐垫、凝胶坐垫（阿伯丁款）和罗霍坐垫）进行测试，每次测试两小时，期间进行日常活动。所获得的结果与先前的研究大致可比。平均压力分别为：泡沫坐垫87.6mmHg（11.6kPa）；凝胶坐垫68.6mmHg（9kPa）；罗霍坐垫54.6mmHg（6.7kPa）。给出了每种坐垫三位受试者的压力-时间直方图。这些图显示了同一坐垫上受试者之间的变异性以及不同坐垫上受试者内部的变异性。因此，个体患者评估对于提供最合适的坐垫很重要。动态压力监测可以确定压力变化模式，从而确定坐垫的潜在有效性。
