Prototype Development of MEMS Sensor Based Total Hip Navigation System

描述（由申请人提供）：我们建议开发一种用户（外科医生）友好、高效、经济的系统，用于精确和可重复的术中患者特异性THA组件定位，该系统基于加速度计和陀螺仪惯性测量单元（imu）的新范例，使用新专利和正在申请专利的技术。该产品的成功开发将大大提高THA手术的准确性，从而大大减少THA翻修次数和总体成本。IMU跟踪：精确、稳健、低成本的微型MEMS陀螺仪和加速度计阵列将与数字信号处理和无线收发器相结合。这些IMU将被放置在手术台上，患者的骨盆上，并连接或嵌入手术工具中。“无图像的患者特定运动学ROM模型：将对患者髋关节运动学进行详细建模，以确定最佳的植入物特定髋臼杯方向和股骨植入物对齐，以避免错位和撞击。”后处理和图形用户界面（GUI）： IMU传感器信号的融合将使用新的算法和过程来提取3D旋转和平移，并在计算机屏幕上实时显示在骨盆和器械的3D模型上，供外科医生使用。ROM模型也将在该系统中可视化，以帮助外科医生在部件定位时参考ROM。本研究的目标是生产一种导航系统，该系统使用骨盆上的IMU跟踪系统、手术工具（髋臼铰刀/尺寸/冲击器）和一个手术台单元，该单元可以接收和处理来自所有来源的数据。

DESCRIPTION (provided by applicant): We propose the development of a user (surgeon) friendly time efficient and cost effective system for accurate and repeatable intraoperative patient-specific THA component positioning based on a new paradigm of accelerometer and gyroscope inertial measurement units (IMUs) using newly patented and patent pending technologies. The successful development of this product will significantly increase the accuracy of THA surgery thereby drastically reducing the number of revision THAs and the overall cost. The proposed product will consist of the following: " IMU tracking: accurate, robust, low cost arrays of miniature MEMS gyroscopes and accelerometers will be coupled with digital signal processing and a wireless transceiver. These IMU's will be placed on the surgical table, the patient's pelvis and attached or embedded in surgical tools. "Imageless patient-specific kinematic ROM model: detailed modeling of the patient hip kinematics will be performed to determine the optimal implant specific acetabular cup orientation and femoral implant alignment to avoid malposition and impingement." Post Processing and graphical user interface (GUI): fusing of IMU sensor signals will be performed using new algorithms and processes to distill 3D rotations and translations and display them on 3D models of the pelvis and instrumentation on a computer screen in real- time for the surgeon. ROM models will also be visualized in this system to help the surgeon with ROM reference during component positioning. The goal of this research is to produce a navigation system using an IMU tracking system on the pelvis, the surgical tools (acetabular reamer/size/impactor), and a surgical table unit that receives and processes data from all sources. PUBLIC HEALTH RELEVANCE: Total hip arthroplasty (THA) revision surgery is too often required due to implantation inaccuracy. This project will design, develop and test a new method of implanting THA components using optimized MEMS sensor devices affixed to or implanted in standard implantation instruments and trials to increase accuracy.