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首页> 外文期刊>Biomedical Circuits and Systems, IEEE Transactions on >A Visual-Aided Wireless Monitoring System Design for Total Hip Replacement Surgery
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A Visual-Aided Wireless Monitoring System Design for Total Hip Replacement Surgery

机译：全髋关节置换手术的可视化无线监控系统设计

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摘要

To improve the positioning accuracy of implants in Total Hip Replacement (THR) surgeries, a visual-aided wireless monitoring system for THR surgery is proposed in this paper. This system aims to measure and display the contact distribution and relative pose between femoral head and acetabulum prosthesis during the surgery to help surgeons obtain accurate position of implants. The system consists of two parts: the Sensors Array Measuring System (SAMS) and the display part. The SAMS is composed of a sensors array (including contact sensors and an image sensor), signal conditioning circuits, a low power microcontroller (MCU), and a low-power transceiver. The SAMS is designed to estimate the relative pose of femoral head component to acetabular component. The display part processes the data from sensors and demonstrates the contact distribution and the pose of the prothesis during the surgery in 3-D graphics. The two parts of the system communicate with each other on an RF link at the band of 400 MHz. The signal conditioning circuits have been designed and fabricated in 0.18 m CMOS process. Testing results show that the resolution of the signal conditioning circuits is 60.1 Vpp (1.35g) with mVpp input. The chip can operate under 1.2-to-3.6 V supply voltage for single battery applications with 116–160 A current consumption. The system has been verified by the simulation with rotation quaternion and translation vector. The experimental results show that the contact distribution and relative pose of the two components could be measured and demonstrated in real time. The relative error of rotation is less than 8% and the actual relative error of translation is less than 10%.
机译：为了提高全髋关节置换术（THR）手术中植入物的定位精度，本文提出了一种用于THR手术的视觉辅助无线监控系统。该系统旨在在手术期间测量和显示股骨头与髋臼假体之间的接触分布和相对姿势，以帮助外科医生获得植入物的准确位置。该系统由两部分组成：传感器阵列测量系统（SAMS）和显示部分。 SAMS由传感器阵列（包括接触传感器和图像传感器），信号调节电路，低功耗微控制器（MCU）和低功耗收发器组成。 SAMS旨在评估股骨头组件与髋臼组件的相对姿势。显示部分处理来自传感器的数据，并在手术中以3D图形显示假体的接触分布和姿势。系统的两个部分在400 MHz的RF链路上相互通信。信号调理电路的设计和制造采用0.18 m CMOS工艺。测试结果表明，使用mVpp输入时，信号调理电路的分辨率为60.1 Vpp（1.35g）。对于单电池应用，该芯片可以在1.2至3.6 V的电源电压下工作，电流消耗为116–160A。通过旋转四元数和平移矢量的仿真验证了该系统。实验结果表明，可以实时测量和演示两个组件的接触分布和相对姿势。旋转的相对误差小于8％，实际平移的相对误差小于10％。

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