Method for locating the mechanical axis of a femur
US7427272B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2003 |
| Grant date | Sep 23, 2008 |
| Priority date | — |
| Expiry date | Nov 30, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2/4657
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
There is described a method for determining a mechanical axis of a femur using a computer aided surgery system having an output device for displaying said mechanical axis, the method comprising: providing a position sensing system having a tracking device capable of registering instantaneous position readings and attaching the tracking device to the femur; locating a center of a femoral head of the femur by moving a proximal end of the femur to a first static position, acquiring a fixed reading of the first static position, repeating the moving and the acquiring for a plurality of static positions; and locating the centre by determining a central point of a pattern formed by the plurality of static positions; digitizing an entrance point of the mechanical axis at a substantially central position of the proximal end of the femur; and joining a line between the entrance point and the center of rotation to form the mechanical axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.