Surgical Treatment of Lumbar Spinal Canal Stenosis:Follw up of 35 Cases

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Since 1973, we have treated surgically 35 cases of lumbar spinal canal stenosis. They are 22 men and 13 women, average age is 58.They include Degenerative (34%), Combined (52%), Post-operative, and Spondylolisthetic type, but no Developemental and Congenital type.The operative procedures are laminectomy for 32 cases, partial laminectomy for 2, anterior spinal fusion for 2. Posterolateral spinal fusion was added for 2 laminectomy cases.Intermittent claudication, lumbago and numbness of leg are common complaints. By the surgical treatment, intermittent claudication is relieved in all cases but one. Lumbago and numness are tend to remain, especially in degenerative spondylolisthesis. In degenerative spondylolisthesis, laminectomy increases the instability of vertebra, and the nerve roots are entrapped in the lateral recess more often than in other type of stenosis. So sufficient decompression of the nerve roots and spinal fusion procedure should be added.
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