Leg length calculation in computer-assisted surgery
US11413164B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2019 |
| Grant date | Aug 16, 2022 |
| Priority date | — |
| Expiry date | Oct 4, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B2210/58
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.