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Japanese

Minimum 2-year Follow-up in Elderly Degenerative Spondylolisthesis Patients who Underwent the Less-invasive Lumber Interlaminar Decompression Surgery Takuya Numasawa 1 , Atsushi Ono 1 , Kanichiro Wada 1 , Yoshihito Yamasaki 1 , Satoshi Toh 1 1Department of Orthopedic Surgery, Hirosaki University Graduate School of Medicine Keyword: 腰椎変性すべり症 , lumbar degenerative spondylolisthesis , 低侵襲除圧術 , less invasive surgery , 高齢者 , elderly patient pp.1019-1023
Published Date 2010/11/25
DOI https://doi.org/10.11477/mf.1408101836
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 Porpose:The aim of this study was to investigate the clinical symptoms and radiographic changes in patients above 60 years of ages who underwent less-invasive interlaminar decompression for lumbar degenerative spondylolisthesis.

 Methods:In this study, 23 patients (men:11, women:12) with a mean age of 69.4 years were followed up for at least 2 years. Radiographic inclusion criteria were as follows:<25% slippage, < -20 degree flexion-extension motion, and a kyphotic angle of <5 degree in flexion at the L4/5 segment. Evaluation on the basis of the Japanese Orthopaedic Association score, Visual Analogue Scale, and Roland Morris Disability Questionnaire revealed that the clinical symptoms significantly improved postoperatively and maintained at 1-year and final follow-up.

 Results:There was no significant difference between the preoperative and final follow-up values for the radiological lumbar lordotic angle in standing position and L4/5 segmental mobile angle. Intervertebral disc height was significantly decreased while the % slippage was significantly increased at L4/5 at the final follow-up.

 Conclusions:We confirmed that,in the patients who underwent less-invasive lumber interlaminar decompression,the radiological anterior slippage was greater while the disc height was smaller than usually observed in the patients who underwent decompression by the conventional method;however,these radiological changes may have no influence on the clinical symptoms.


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電子版ISSN 1882-1286 印刷版ISSN 0557-0433 医学書院

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