Graichen F, Bergmann G, Rohlmann A
Free University of Berlin, Department of Orthopaedics, Oskar-Helene-Heim, Clayallee, Berlin, Germany.
Med Eng Phys. 1996 Mar;18(2):167-74. doi: 10.1016/1350-4533(95)00030-5.
Fractures of the spine can be stabilized by different implants. Their stiffness varies widely and only little is known about the loads acting on these devices. In order to measure the forces and moments in the implant, the internal fixator after Dick was modified. An inductively powered telemetry unit is placed inside the fixator and is hermetically sealed against body fluids. An integrated eight channel telemetry chip was developed to measure the signals of six strain gauge sensors, the implant temperature and the power supply. Because two fixators are implanted together, two telemetry transmitters run at the same time. This paper describes the function of the instrumented implant and the external system components.
脊柱骨折可通过不同的植入物实现稳定。它们的刚度差异很大，而作用于这些装置上的载荷却知之甚少。为了测量植入物中的力和力矩，对迪克式内固定器进行了改进。一个感应供电的遥测单元被放置在固定器内部，并进行了密封以防止体液侵入。开发了一种集成的八通道遥测芯片，用于测量六个应变片传感器的信号、植入物温度和电源情况。由于两个固定器是一起植入的，所以两个遥测发射器同时运行。本文描述了这种仪器化植入物及外部系统组件的功能。
