TWI-Hellas, 152 32 Halandri, Greece.
KTH Royal Institute of Technology, 10044 Stockholm, Sweden.
Sensors (Basel). 2021 May 28;21(11):3743. doi: 10.3390/s21113743.
A decision support system (DSS) was developed that outputs suggestions for socket-rectification actions to the prosthetist, aiming at improving the fitness of transfemoral prosthetic socket design and reducing the time needed for the final socket design. For this purpose, the DSS employs a fuzzy-logic inference engine (IE) which combines a set of rectification rules with pressure measurements generated by sensors embedded in the socket, for deciding the rectification actions. The latter is then processed by an algorithm that receives, manipulates and modifies a 3D digital socket model as a triangle mesh formatted inside an STL file. The DSS results were validated and tested in an FEA simulation environment, by simulating and comparing the donning process among a good-fitting socket, a loose socket (poor-fit) and several rectified sockets produced by the proposed DSS. The simulation results indicate that volume reduction improves the pressure distribution over the stump. However, as the intensity of socket rectification increases, i.e., as volume reduction increases, high pressures appear in other parts of the socket which generate discomfort. Therefore, a trade-off is required between the amount of rectification and the balance of the pressure distributions experienced at the stump.
开发了一个决策支持系统 (DSS)，为假肢技师输出适合腔的矫正建议，旨在改善股骨截肢者接受腔设计的适应性并减少最终接受腔设计所需的时间。为此，DSS 采用了模糊逻辑推理引擎 (IE)，该引擎将一组矫正规则与嵌入接受腔中的传感器生成的压力测量值相结合，以决定矫正动作。然后，通过接收、操作和修改以 STL 文件格式的三角网格形式格式化的 3D 数字接受腔模型的算法对其进行处理。通过在 FEA 模拟环境中对 DSS 进行验证和测试，模拟和比较了合适的接受腔、松动的接受腔（不合适）和由提出的 DSS 产生的几个矫正接受腔之间的穿脱过程。模拟结果表明，体积减小可改善残肢上的压力分布。然而，随着接受腔矫正强度的增加，即体积减小的增加，接受腔的其他部位会出现高压力，从而产生不适感。因此，需要在矫正量和残肢上的压力分布平衡之间进行权衡。
