TARGETING DEVICE AND METHOD

摘要

The present invention relates to a method for fixing an intramedullary cavity nail for the treatment of unstable trochanteric fractures and to a targeting device for use in performing the steps of said method. According to the method, a recess (16) for a femur neck screw (8) for fixing the cavity nail (2) is provided in at least the lateral cortex of the femoral shaft (FS) in close distal proximity to a hole (9) for the femur neck screw such that bone fragment(s) located distally of the fracture and bone fragment(s) located proximally of the fracture relatively seen can be displaced towards each other. A targeting head (5) of the targeting device (1) is configured with a targeting bore (14) which is alignable with a point on the femoral shaft (FS) in close distal proximity to the hole (9) for the femur neck screw (8) for use in providing at said point, said recess (16) for the femur neck screw.

主权项

1. Method for fixing an intramedullary cavity nail for the treatment of unstable tro-chanteric femur fractures, wherein said method comprises the steps of inserting a cavity nail (2) into the intramedullary canal (10) of the femoral shaft (FS) of the fractured femur,
providing a hole (9) for a femur nock screw which extends through the femoral shaft (FS), through an inclined proximal through-hole (7) in the cavity nail (2) and through the fracture into the femoral head (FH) of the fractured femur on the opposite side of the cavity nail and the fracture, providing a hole (13) for a diaphysis screw which extends into the femoral shaft (FS) and through an oblong distal through-hole (11) in the cavity nail (2) into the femoral shaft on the opposite side of the cavity nail, screwing a femur neck screw (8) and a diaphysis screw (12) into the respective hole (9 and 13 respectively) therefor for fixing the cavity nail (2) in the intramedullary canal (IC) of the femoral shaft (FS) such that withdrawal of the cavity nail there-from is prevented, and providing in close distal proximity to the hole (9) for the femur neck screw (8), a recess (16) for the femur neck screw at least in the lateral cortex of the femoral shaft (FS) such that the at least one bone fragment located distally of the unstable trochanteric fracture, primarily the femoral shaft (FS), and the at least one bone fragment located proximally of the unstable trochanteric fracture, primarily the femoral head (FN), relatively seen can be displaced towards each other in the longitudinal direction of the femoral shaft and the cavity nail (2).