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KMID : 1099620090060020061
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Korean Journal of Spine
2009 Volume.6 No. 2 p.61 ~ p.67
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Efficacy of Microdecompression with Microxcope and Tubular Retractor im Lumbar Forminal Stenosis: Surgical Technique and Clinical Outcomes
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Choi Hyun-Min
Park Kwan-Ho
Kim Tae-Wan
Kim Jae-O
Kim Jung-Chul
Chi Moon-Pyo
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Abstract
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Objective: The objective of this study is to evaluate the efficacy of microdecompression (MD) with microscope and tubular retractor in lumbar foraminal stenosis (FS) and to analyze the clinical outcomes.
Methods: From January 2006 to December 2007, 22 patients with symptomatic lumbar FS underwent conventional decompressive surgery (CDS) and MD was performed in other 20 patients. Clinical outcome was measured using a Visual Analogue Scale (VAS) and Macnab?fs criteria. Spinal instability was determined by radiologic assessment of flexion-extension radiographs.
Results: The CDS group included 14 men and 8 women. The MD group included 14 men and 6 women. The mean age was 66.2 years (range, 46-80 yrs) in the CDS group and 65.4 years (range, 59-74 yrs) in the MD group. Average follow-up periods were 18.6 months in the CDS group and 16.5 months in the MD group. Mean operating time was 126 minutes in the CDS group and 168 minutes in the MD group. The mean VAS of back pain decreased from 2.68 to 1.36 in the CDS group and from 2.85 to 1.25 in the MD group. The mean VAS score of leg pain decrea- sed from 6.68 to 1.48 in the CDS group and from 6.65 to 1.40 in the MD group. The success rate of CDS group was 86.3 % (19/22), compared with 85.0% (17/20) for MD group. Radiologically, there was no spinal instability.
Conclusion:MD could achieve neural decompression and offer an effective treatment of lumbar FS. However it was a technically demanding procedure and effective in limited operative indications. We need to consider long-term follow-up.
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KEYWORD
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Lumbar, foraminal Stenosis, Open decompressive surgery, Tubular retractor, Microdecompression
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