Tips of the Trade :14. A guide for the proper placement of a above a

cannulated Asnis screw above a sliding DHS hip screw.

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Grenis MS. Uhl RL. Orthopaedic Review. 18(7):818-21, 1989 Jul. Low fractures of the femoral neck are often treated by reduction and internal fixation with a sliding screw and plate. In base of the neck fractures, a supplemental cannulated screw should be used to prevent rotation of the femoral head and neck during sliding screw insertion. It is critical that the large sliding screw and the smaller supplemental screw are inserted in parallel alignment, without impinging upon each other. This article describes an easily manufactured guide that facilitates parallel placement of the screws and assures adequate clearance between the two screws.