Method for locating the mechanical axis of a femur

Details Method for locating the mechanical axis of a femur Method for locating the mechanical axis of a femur

2003-07-15

2008-09-23

Casler, Brian L. (Department: 3737)

Surgery

Diagnostic testing

Measuring anatomical characteristic or force applied to or...

C600S595000, C606S089000, C606S130000

Reexamination Certificate

active

07427272

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.

REFERENCES:
patent: 5611353 (1997-03-01), Dance et al.
patent: 2003/0069591 (2003-04-01), Carson et al.
patent: WO 00/48507 (2000-08-01), None
patent: WO 02/17798 (2002-03-01), None
patent: WO 02/47559 (2002-06-01), None
patent: WO/0247559 (2002-06-01), None

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