公开(公告)号：US11413164B2

公开(公告)日：2022-08-16

申请号：US16535659

申请日：2019-08-08

Applicant: ORTHOSOFT INC.

Inventor： Karine Duval ,  Di Li ,  Laurence Moreau-Belanger ,  Benoit Pelletier ,  Yvan Leone ,  Myriam Valin ,  François Paradis

IPC: A61B5/107 ,  A61F2/46 ,  A61B34/20 ,  A61B5/00 ,  A61B34/00 ,  A61B17/84 ,  G01B21/04 ,  A61B90/00

Abstract: A computer-assisted surgery system has inertial sensor unit connected to an instrument and producing readings representative of its orientation. A computer-assisted surgery processor unit has a coordinate system module for setting a pelvic coordinate system from readings of the inertial sensor unit when the instrument is in a given orientation relative to the pelvis, a tracking module for tracking an orientation of the instrument relative to the pelvic coordinate system during movements thereof and a geometrical relation data module for recording preoperatively a landmark orientation relative to the pelvic coordinate system and a distance when the at least one instrument has a first end abutted to a pelvic landmark and a second end abutted to a leg landmark, for recording after implant rejointing the medio-lateral orientation and the distance, and for calculating a leg length discrepancy and/or an offset, based on the distances and the medio-lateral orientations.