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Results of Expansive Laminoplasty for Lumbar Spinal Stenosis in Active Manual Workers

MATSUI, HISAO, MD; TSUJI, HARUO, MD; SEKIDO, HIROMICHI, MD; HIRANO, NORIKAZU, MD; KATOH, YOSHIHARU, MD; MAKIYAMA, NAOYA, MD

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Expansive laminoplasty was done on 18 selected patients with lumbar spinal canal stenosis who were active manual workers and 2 patients with cauda equina tumors from 1982 to 1990. Postoperative follow-up on the lnitial 10 cases of spinal stenosis was 1–7 years (mean, 3 years). Using computed tomography, the spinal canal was found to be enlarged with a nearly rectangular shape, and the mean percent eniargement was 119% (1.9 cm2). Spinal stability also was reinforced. The preoperative mean evaluation score (Japanese Orthopaedic Association score) was 10.4 (full scale, 29). The mean score improved to 24 postoperatively (mean percent improvement, 73%). These findings did not change during the long follow-up, and the satisfactory results were maintained.

Depatment of Orthopadic Surgery, Faculty of Medicine, Toyama Medical and Pharmachutical University, Toyama, Japan

© Lippincott-Raven Publishers.