Abstract: An apparatus and method for determining offset-inset distances in the course of a total hip arthroplasty procedure. The apparatus includes a first attachment attachable to the superior eminence of the acetabulum, a second attachment point capable of being fixed to the femur at approximately the position of the greater trochanter, and preferably, a measuring device for measuring and noting the distance between the reference point and either the third or fourth fixed points.

Abstract: An apparatus for use in surgical hip replacement procedures for ensuring that the replacement hip joint components are properly sized. The acetabulum and femur are exposed, one end of a flexible measuring cable is attached to the superior eminence of the acetabulum and the cable is extended inferiorly so that it is aligned with a specific point on the femur, preferably the lesser trochanter. The selected point on the femur is marked and the scaling or marking indicator carried by the flexible cable is positioned in relation thereto. After this reference distance between the fixed points is determined, the flexible cable is moved out of the way while its end remains fixed to the acetabulum. The installation of an acetabular cup prosthesis and the femur is prepared to receive the femoral implant. After the femur is prepared, trial femoral implants are installed to determine the proper fit with the femoral canal.

Abstract: A method and apparatus for use in surgical hip replacement procedures for ensuring that the replacement hip joint components are properly sized. A flexible measuring cable is attached to the superior eminence of the exposed acetabulum and extended inferiorly to be aligned with a specific point on the femur. A marking indicator carried by the flexible cable is positioned to provide a reference distance between the fixed points on the acetabulum and the femur. Trial femoral implants can be selected to have proper neck length by extending the flexible cable attached at one end to the acetabulum toward the marked position of the femur so that the marked position is aligned with the indicator fixed to the cable. The cable may again be extended between the fixed point on the superior eminence of the acetabulum and the marked point of the femur and greater or lesser length femoral neck components may be selected until the correct length is achieved.

Abstract: A method and apparatus for providing accurate measurement, in the course of an A method andprocedure, of the length dimension of a bone joint movable between an extended and flexed position.