Abstract

Info

Title:: Measurement of the accuracy of total knee replacement navigation system and method implementation

Author(s):: ZHENG Lifu; Beijing Institute of Medical Device Testing, Beijing 101111, China

Keywords:: Keywords: total knee replacement navigation system laser tracker saw simulation tool

Abstract:: Abstract: Objective To propose an approach to measure and quantify the parameters of total knee replacement navigation system, thereby realizing the measurement of the accuracy of the navigation system. Methods The test system used laser tracker, spherically mounted retro-reflectors and saw simulation tool to capture the location and orientation of the positioning plane of the navigation system. The spatial coordinates of the spherically mounted retro-reflectors were utilized to calculate the positioning geometry data of the navigation system for accurately measuring the precision and accuracy of the navigation system. Results The proposed method was applied on a total knee replacement navigation system for several rounds of measurements and analysis. The positioning location accuracy, positioning location repeatability, positioning orientation accuracy and positioning orientation repeatability of the navigation system were calculated, and the validity of the test data was analyzed. Conclusion The proposed method which is easy to operate, with high repeatability and accurate test results can effectively help technicians test and analyze the positioning accuracy of the navigation system.