Fig 1.

Paraspinal compression maneuver. An imaginary line is drawn horizontally between the tops of the iliac crests. The intersection point where the midline passes through the imaginary line vertically is marked. A total of 6 spots are marked. The first 2 spots are placed 2 finger widths laterally and 1 finger width below the intersect point. The second 2 spots are placed 1 finger width below the first spots. A, The third set of 2 spots is placed 1 finger width below the second spots. B, The examiner presses each spot with both thumbs. A positive sign of this maneuver is a definite sharp pain on 1 side and no pain on the other side.