Fig 1.

(A) Curved marking/measuring device. This instrument allows direct measurement of the medial wall of the lateral femoral condyle and anatomic positioning of the femoral tunnel. (B) Measuring from low position: the view is of the medial wall of the lateral femoral condyle of the left knee from the AM portal with the knee at 90° of flexion. The height of the center of the femoral tunnel is 2 mm plus the radius of the tunnel above the low articular margin. (C) Close-up of measuring arm. (D) Measuring deep to shallow or front to back of notch. The anatomic or midbundle position is halfway from the deep to the shallow articular cartilage. Again, the view is from the AM portal at 90° of flexion.