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Wheeless' Textbook of Orthopaedics
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Selection of Fusion Level





- See: Treatment based on King et al Algorithm

- Discussion:
    - fusion mass needs to include distal vertebra of structural curve;
    - if a more distal vertebra appears rotated in the same direction as more
          cephalad vertebrae, it should be included in the fusion mass;
    - arthrodesis should include the first stable vertebra
          - this is the vertebrae that is bisceted by a line drawn thru the middle
                of the spinous process of S1 perpendicular to the iliac crest;
    - in low lumbar curves, avoid extending the fusion mass past L4;

- Radiographs:
    - lateral bending x-rays help delineate structural curves from compensatory
            curves which should not be included in the fusion mass;

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The selection of fusion levels in thoracic idiopathic scoliosis.



Original Text by Clifford R. Wheeless, III, MD.