公开(公告)号：US20180147016A1

公开(公告)日：2018-05-31

申请号：US15881288

申请日：2018-01-26

Applicant: ORTHOSOFT INC.

Inventor： Myriam VALIN ,  Catherine PROULX ,  Louis-Philippe AMIOT ,  Bruno FALARDEAU ,  Julie DESLONGCHAMPS

IPC: A61B34/20

CPC classification number: A61B34/20 ,  A61B2034/2048

Abstract: A system for tracking a femoral frame of reference in computer-assisted surgery comprises a sensor unit. The sensor unit is adapted to be secured to the femur. The sensor unit comprises accelerometer and gyroscope sensors that produce orientation data. A processing unit receives gyroscope and accelerometer data. The processing unit comprises a gyroscope-data calculator to provide calculated acceleration data resulting from movements of the femur, an accelerometer-data calculator to calculate measured acceleration data resulting from movements of the femur, and an acceleration comparator to relate an orientation of the sensor unit to the femur to define a femoral frame of reference. The femoral frame of reference is defined from the comparison between the calculated and the measured acceleration data. A sensor orientation interface provides orientation data for the femur from a tracking of the femoral frame of reference. A method for tracking a femoral frame of reference is also provided.