Introduction The Compass Knee Hinge can be a useful part of the treatment regimen for highly unstable knee dislocations.
Step 1: Initial Alignment of Wires Make sure to place the centering wire at the isometric point of the knee.
Step 2: Placement of the Compass Knee Hinge Take the necessary steps to place the Compass Knee Hinge over the wire.
Step 3: Application of the Compass Knee Hinge with Concurrent Procedures If repair or reconstruction of either the posteromedial or the posterolateral corner is part of the planned surgical procedure, place the centering wire prior to the repair or reconstruction of the injured corner.
Step 4: Postoperative Protocol Postoperatively, use progressive protocols to enable the patient to regain knee motion following the application of the hinge.
Results The above technique was used to treat fifty-five patients with a total of fifty-six knee dislocations who had various concurrent ligamentous reconstructions14.
Pitfalls & Challenges
The Compass Knee Hinge can be a useful part of the treatment regimen for highly unstable knee dislocations.
The Compass Knee Hinge is a hinged external fixator that provides multiplanar fixation across the knee joint while allowing sagittal plane motion. It can be utilized to provide stabilization of the knee in the setting of dislocation, fracture-dislocation, and multiple-ligament injuries, as opposed to using a fixed external fixator or knee brace alone.
Dislocation of the knee most frequently occurs from high-energy blunt trauma but may also result from an athletic competition injury. Knee dislocations are defined as multiple-ligament injuries, which typically involve the two cruciate ligaments. The injury may also involve the collateral ligaments and in most cases spontaneously reduces prior to presentation to the emergency room1-3. Treatment of these injuries has evolved as surgeons have attempted to balance the goal …
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