A Development of Measurement System for Radioulnar Instability by Using 3D Electromagnetic Sensor and Pressure Sensor

Abstract

Triangular Fibro-Cartilage Complex (TFCC) injures occur due to falling, traffic accident, abuse of wrist at work and log time sport. There are imaging and palpation for diagnosing TFCC tear. Imaging can confirm ligament tear, however it cannot measure bone movement. On the other hand, there are ballottement test and piano key sign in palpation methods, but these methods largely depend on doctor’s sense and experience. Therefore, it is impossible to diagnose quantitatively. This study has developed a measurement system to assess instability of ulna toward palmer side and wrist pressure quantitively in real time by using 3D electromagnetic sensor and pressure sensor.