Nakagami Gojiro, Sanada Hiromi, Sugama Junko
Department of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo , Tokyo , Japan and.
Disabil Rehabil Assist Technol. 2015 Mar;10(2):165-9. doi: 10.3109/17483107.2013.867371. Epub 2013 Dec 9.
To investigate the effect of alternating air cells of a newly developed dynamic cushion on interface pressure and tissue oxygenation levels.
This cross-over experimental study included 19 healthy volunteers. The dynamic cushion used has an automatic self-regulating alternating pressure air-cell system with 35 small and four large air cells for maintaining posture while seated. This cushion also has 17 bottoming-out detectors that automatically inflate the air cells to release a high interface pressure. To assess the effect of this alternating system, participants sat on the new cushion with an alternating system or static system for 30 min and then performed push-ups. The interface pressure was monitored by pressure-sensitive and conductive ink film sensors and tissue oxygenation levels were monitored by near-infrared spectroscopy. A reactive hyperaemia indicator was calculated using tissue oxygenation levels as an outcome measure.
The peak interface pressure was not significantly different between the groups. The reactive hyperaemia indicator was significantly higher in the static group than in the alternating group.
An alternating system has beneficial effects on blood oxygenation levels without increasing interface pressure. Therefore, our new cushion is promising for preventing pressure ulcers with patients with limited ability to perform push-ups. Implications for Rehabilitation A dynamic cushion was developed, which consists of a uniquely-designed air-cell layout, detectors for bottoming out, and an alternating system with multiple air-cell lines. The alternating system did not increase interface pressure and it significantly reduced reactive hyperaemia after 30 min of sitting in healthy volunteers. This cushion is a new option for individuals who require stable posture but have limitations in performing scheduled push-ups for prevention of pressure ulcers.
研究一种新开发的动态坐垫的交替气室对界面压力和组织氧合水平的影响。
这项交叉实验研究纳入了19名健康志愿者。所使用的动态坐垫具有自动自我调节的交替压力气室系统，有35个小气室和4个大气室，用于在坐姿时维持姿势。该坐垫还有17个触底探测器，可自动给气室充气以释放高界面压力。为评估这种交替系统的效果，参与者分别坐在带有交替系统或静态系统的新坐垫上30分钟，然后做俯卧撑。通过压敏和导电油墨薄膜传感器监测界面压力，通过近红外光谱监测组织氧合水平。使用组织氧合水平作为结果指标计算反应性充血指标。
两组之间的峰值界面压力无显著差异。静态组的反应性充血指标显著高于交替组。
交替系统对血液氧合水平有有益影响，且不增加界面压力。因此，我们的新坐垫对于预防做俯卧撑能力有限的患者发生压疮很有前景。对康复的意义 开发了一种动态坐垫，其由独特设计的气室布局、触底探测器和带有多条气室线路的交替系统组成。交替系统在健康志愿者坐30分钟后未增加界面压力，且显著降低了反应性充血。这种坐垫为那些需要稳定姿势但在定期做俯卧撑以预防压疮方面有局限性的个体提供了一种新选择。
