Patent ID: 7648510
Filing Date: 2010-01-19
Classification: A61B,A61F

Abstract:
1. An adjustment apparatus for the selection of suitable implant sizes in knee operations comprising a lower work unit supportable on a tibia and an upper work unit supportable on a femur, wherein the lower work unit and the upper work unit are vertically adjustable relative to one another and with which the spacing between the tibia and the femur can be adjusted by spreading apart the knee, wherein the upper work unit includes a carrier that is vertically adjustable relative to the lower work unit and at least two different functional units which are releasably couplable to the carrier, wherein one of the at least two different functional units is formed as an extension unit serving for the spreading apart of the knee when the femur is in extension, and another of the at least two different functional units is formed as a flexion unit serving for the spreading apart of the knee and for the selection of a suitable implant size when the femur is in flexion, wherein the flexion unit includes a base section couplable to the carrier and a central guide piece which can alternatively be brought into a condition freely movable in height or fixed relative to the base section, wherein the central guide piece is rotatable relative to the base section about an axis extending in the spreading apart direction and wherein, when the central guide piece is fixed, the knee can be spread apart by changing the spacing between the lower work unit and the carrier and, when the central guide piece is freely movable, the base section is adjustable in height relative to the central guide piece.