METHOD FOR PLANNING ROTATIONAL POSITIONING OF FEMORAL COMPONENT OF KNEE ENDOPROSTHESIS Russian patent published in 2024 - IPC A61B17/56 

FIELD: medicine; traumatology; orthopedics.

SUBSTANCE: preoperative computed tomography of the involved knee joint is performed. Obtained images are analyzed to determine a rotational reference point. For this purpose, during step-by-step analysis of images in an axial projection of the knee joint, anatomical landmarks are marked: at the moment of visualization of the upper pole of the patella—a line passing tangentially through the protruding contours of the distal metaphysis of the femur, at the moment of detecting the apex of the lateral epicondyle and the groove in the center of the medial epicondyle—a line passing through them, after which they are completed to the point of intersection, determining the angle between them. Rotational landmark is intraoperatively projected—surgical supracondylar line on distal saw line of femoral condyles at previously defined angle to line, passing through the projecting parts of the plate of the compact bone substance of the distal metaphysis of the femur in the region of the superior pole of the patella. Resection block is placed along the formed projection of the surgical supracondylar line. Distal femoral bone is sawed off, followed by implantation of the endoprosthesis.

EFFECT: use of the disclosed method will simplify the process of preoperative planning of the rotation of the femoral component of the knee endoprosthesis while maintaining accuracy of intraoperative determination of rotational reference point.

1 cl, 1 dwg