EC-Service Inc., 915 South Frontage Rd, Centerville, UT, 84014-3211, USA.
Weber State University, 3850 Dixon Pkwy 1031, Ogden, UT, USA.
J Tissue Viability. 2024 May;33(2):292-297. doi: 10.1016/j.jtv.2024.02.003. Epub 2024 Feb 11.
This study investigated how the air-bladder offloading mode of the Orbiter by Kalogon wheelchair cushion (Orbiter) affected blood flow in the gluteal region of non-disabled subjects. The hypothesis was that the cushion's offloading mode would improve blood flow, resulting in reduced reactive hyperemia when compared to the static setting, or Loaded Control (LC). Furthermore, the study proposed a technique using a high-resolution image laser speckle contrast system to measure blood flow in the gluteal area.
Two procedures were carried out, one with the participant sitting on a cushion in LC, and the second, the cushion was set to offloading mode. Blood flow was measured through data imaging after each procedure. Three trials were performed, starting and ending in different cushion bladders. Customized algorithms were used to select regions of interest on the images for calculations. The Wilcoxon Signed-Rank Test was conducted to compare the offloads and loaded control values of each region of interest. Results were considered significant at α = 0.05.
Ten healthy, non-disabled adults participated in the study, seven females and three males. There were no significant differences among the participants. However, results showed that seven subjects tended to decrease reactive hyperemia in the offload sequence of trial when the last two bladders offloaded were the sacrum followed by the right ischial tuberosity.
The high-resolution imager showed that the Orbiter Offloads helped reduce reactive hyperemia in seven subjects, potentially improving blood flow. More research is necessary to comprehend the mechanisms of these effects fully.
本研究旨在探讨 Orbiter 气腔卸荷模式对非残疾受试者臀部血流的影响。假设是该坐垫的卸荷模式将改善血流，与静态设置（或负载控制 LC）相比，反应性充血减少。此外，本研究提出了一种使用高分辨率图像激光散斑对比系统测量臀部血流的技术。
进行了两项程序，一项是参与者坐在 LC 垫上，第二项是将坐垫设置为卸荷模式。每次程序后通过数据成像测量血流。进行了三次试验，起始和结束于不同的坐垫气腔。使用定制的算法选择图像上的感兴趣区域进行计算。使用 Wilcoxon 符号秩检验比较每个感兴趣区域的卸荷和加载控制值。结果在 α = 0.05 时被认为是显著的。
共有 10 名健康的非残疾成年人参加了这项研究，其中 7 名女性和 3 名男性。参与者之间没有显著差异。然而，结果表明，在最后两个气腔卸载时依次为骶骨和右坐骨结节，七个受试者在卸载序列中反应性充血有减少的趋势。
高分辨率成像仪显示，Orbiter 卸荷有助于减少七个受试者的反应性充血，可能改善血流。需要进一步研究以充分理解这些影响的机制。
