Al-Fakih Ebrahim, Arifin Nooranida, Pirouzi Gholamhossein, Mahamd Adikan Faisal Rafiq, Shasmin Hanie Nadia, Abu Osman Noor Azuan
University of Malaya, Department of Biomedical Engineering, Faculty of Engineering, Kuala Lumpur, Malaysia.
University of Malaya, Department of Electrical Engineering, Faculty of Engineering, Kuala Lumpur, Malaysia.
J Biomed Opt. 2017 Aug;22(8):1-8. doi: 10.1117/1.JBO.22.8.087001.
This paper presents a fiber Bragg grating (FBG)-instrumented prosthetic silicone liner that provides cushioning for the residual limb and can successfully measure interface pressures inside prosthetic sockets of lower-limb amputees in a simple and practical means of sensing. The liner is made of two silicone layers between which 12 FBG sensors were embedded at locations of clinical interest. The sensors were then calibrated using a custom calibration platform that mimics a real-life situation. Afterward, a custom gait simulating machine was built to test the liner performance during an amputee's simulated gait. To validate the findings, the results were compared to those obtained by the commonly used F-socket mats. As the statistical findings reveal, both pressure mapping methods measured the interface pressure in a consistent way, with no significant difference (P-values ≥0.05). This pressure mapping technique in the form of a prosthetic liner will allow prosthetics professionals to quickly and accurately create an overall picture of the interface pressure distribution inside sockets in research and clinical settings, thereby improving the socket fit and amputee's satisfaction.
本文介绍了一种基于光纤布拉格光栅（FBG）的假肢硅胶内衬，它可为残肢提供缓冲，并能以一种简单实用的传感方式成功测量下肢截肢者假肢接受腔内的界面压力。该内衬由两层硅胶制成，在两层之间的临床关注位置嵌入了12个FBG传感器。然后使用一个模拟实际情况的定制校准平台对传感器进行校准。之后，制造了一台定制的步态模拟机来测试该内衬在截肢者模拟步态过程中的性能。为了验证研究结果，将结果与常用的F型接受腔垫所获得的结果进行了比较。统计结果显示，两种压力映射方法测量界面压力的方式一致，无显著差异（P值≥0.05）。这种假肢内衬形式的压力映射技术将使假肢专业人员能够在研究和临床环境中快速准确地了解接受腔内界面压力分布的全貌，从而改善接受腔的适配性和截肢者的满意度。
