Levine S P, Kett R L, Cederna P S, Brooks S V
Department of Physical Medicine and Rehabilitation, Medical School, University of Michigan, Ann Arbor.
Arch Phys Med Rehabil. 1990 Mar;71(3):210-5.
This study measured changes in tissue shape and deformation at the seating interface produced by electric muscle stimulation (EMS) of the gluteus maximus. The purpose of the study was to investigate the application of EMS for pressure sore prevention. Limitations of pressure measurements for analysis of load distribution are discussed and a rationale developed for using tissue shape and deformation to further characterize the seating interface. Ultrasonic imaging of the seating interface is described under three conditions: buttocks suspended, external load applied with no EMS, and external load applied with bilateral EMS of the buttocks. Results show that low level stimulation of the gluteus maximus produces substantial changes in the shape of the loaded buttocks and an external contour more nearly shaped like the suspended buttocks. It is concluded that EMS produces buttock tissue undulation and shape reconfiguration which may assist in preventing pressure sores over the seating surface.
本研究测量了臀大肌电刺激（EMS）在座椅界面处产生的组织形状变化和变形。该研究的目的是探讨EMS在预防压疮方面的应用。讨论了用于分析负荷分布的压力测量的局限性，并提出了使用组织形状和变形来进一步表征座椅界面的基本原理。描述了在三种条件下对座椅界面进行的超声成像：臀部悬空、施加外部负荷但无EMS、以及对臀部进行双侧EMS并施加外部负荷。结果表明，对臀大肌的低水平刺激会使负重臀部的形状产生显著变化，并且外部轮廓更接近悬空臀部的形状。得出的结论是，EMS会产生臀部组织波动和形状重新配置，这可能有助于预防座椅表面的压疮。
