Patent ID: 8257361

Claim:
An instrument for locating an axis of a blocking screw, the instrument applicable for a retrograde installation of a femoral intramedullary device or an antegrade installation of a tibial intramedullary device, the instrument comprising: a. a drill jig having a radiolucent frame portion and a mounting portion, said mounting portion adapted to connect to an intramedullary device, and said frame portion further comprising at least one aperture for locating the axis of the blocking screw; and wherein said frame portion or said mounting portion is adjustable to locate said at least one aperture in a longitudinal direction along a long axis of the intramedullary device, wherein said mounting portion further comprises a neck and a barrel, and wherein said mounting portion is adjusted by removing said barrel and operatively connecting a second barrel having a length different than said barrel to said mounting portion.