Patent ID: 7955280

Claim:
A method of measuring surgical parameters in computer-assisted surgery so as to guide an operator in inserting a hip joint implant in a femur, comprising: i) digitizing a frame of reference of a pelvis, the frame of reference of the pelvis being trackable in space; ii) digitizing a pre-reduction frame of reference of the femur as a function of the frame of reference of the pelvis, the pre-reduction frame of reference comprising a femoral axis; iii) obtaining a reference orientation for the femoral axis of the pre-reduction frame of reference of the femur with respect to the frame of reference of the pelvis; iv) digitizing a reduction frame of reference of the femur by virtually orienting the femoral axis in said reference orientation as a function of the frame of reference of the pelvis, after initiation of implant reduction; v) providing the surgical parameters associating the femur to the pelvis and measured as a difference between the first and second frames of reference of the femur.