Bercich Rebecca A, Wang Zhi, Mei Henry, Hammer Lauren H, Seburn Kevin L, Hargrove Levi J, Irazoqui Pedro P
Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA.
J Neural Eng. 2016 Aug;13(4):046012. doi: 10.1088/1741-2560/13/4/046012. Epub 2016 Jun 6.
A significant challenge in rehabilitating upper-limb amputees with sophisticated, electric-powered prostheses is sourcing reliable and independent channels of motor control information sufficient to precisely direct multiple degrees of freedom simultaneously.
In response to the expressed needs of clinicians, we have developed a miniature, batteryless recording device that utilizes emerging integrated circuit technology and optimal impedance matching for magnetic resonantly coupled (MRC) wireless power transfer to improve the performance and versatility of wireless electrode interfaces with muscle.
In this work we describe the fabrication and performance of a fully wireless and batteryless EMG recording system and use of this system to direct virtual and electric-powered limbs in real-time. The advantage of using MRC to optimize power transfer to a network of wireless devices is exhibited by EMG collected from an array of eight devices placed circumferentially around a human subject's forearm.
This is a comprehensive, low-cost, and non-proprietary solution that provides unprecedented versatility of configuration to direct myoelectric prostheses without wired connections to the body. The amenability of MRC to varied coil geometries and arrangements has the potential to improve the efficiency and robustness of wireless power transfer links at all levels of upper-limb amputation. Additionally, the wireless recording device's programmable flash memory and selectable features will grant clinicians the unique ability to adapt and personalize the recording system's functional protocol for patient- or algorithm-specific needs.
使用先进的电动假肢为上肢截肢者进行康复治疗面临的一个重大挑战是获取可靠且独立的运动控制信息通道，以同时精确地控制多个自由度。
为了满足临床医生提出的需求，我们开发了一种微型无电池记录设备，该设备利用新兴的集成电路技术以及用于磁共振耦合（MRC）无线电力传输的最佳阻抗匹配，来提高与肌肉的无线电极接口的性能和通用性。
在这项工作中，我们描述了一种完全无线且无电池的肌电图记录系统的制造和性能，并展示了该系统用于实时控制虚拟肢体和电动假肢的情况。从环绕人类受试者前臂圆周放置的八个设备阵列收集的肌电图显示了使用MRC优化向无线设备网络进行电力传输的优势。
这是一个全面、低成本且非专有的解决方案，它为控制肌电假肢提供了前所未有的配置通用性，且无需与身体进行有线连接。MRC对各种线圈几何形状和排列的适应性有可能提高上肢截肢各个层面无线电力传输链路的效率和稳健性。此外，无线记录设备的可编程闪存和可选择功能将赋予临床医生独特的能力，使其能够根据患者特定需求或算法需求调整并个性化记录系统的功能协议。
