Patent ID: 7976482

Claim:
A device for measuring displacement of the tibia ( 46 ) in relation to the femur ( 56 ) in response to an applied force or torque on the tibia and/or the femur, comprising a first shaft ( 10 ) being tiltable about a first axis close to the ankle and parallel to the coronal plane of a patient's body, a second shaft ( 20 ) being connected to said first shaft ( 10 ) and being rotatable about a second axis perpendicular to said first axis, being close to the ankle and parallel to the tibia, a foot support platform ( 30 ) being mounted on said second shaft ( 20 ), the foot support platform having means for attaching the foot thereto at a fixed position, at least one displacement test device ( 60 ) for applying forces to the tibia and either measuring displacement of the proximal tibia ( 46 ) relative to the distal femur ( 56 ) or measuring drawer shift, and either at least one means ( 13 , 23 ) for driving at least one of said first shaft ( 10 ) or second shaft ( 20 ) with a predetermined torque and/or with a predetermined force or at least one means ( 13 , 23 ) for driving at least one of said first shaft ( 10 ) or second shaft ( 20 ), and means for stopping tilt or rotation motion after a predetermined position and/or predetermined force has been reached.