Semi-Circumferential Decompression: Microsurgical Total en-bloc Ligamentum Flavectomy to Treat Lumbar Spinal Stenosis with Grade I Degenerative Spondylolisthesis

摘要: To describe and assess clinical outcomes of the semi-circumferential decompression technique for microsurgical en-bloc total ligamentum flavectomy with preservation facet joint to treat patients who have a lumbar spinal stenosis degenerative spondylolisthesis.We retrospectively analyzed radiologic 19 Meyerding grade I spondylolisthesis. They were treated using "semi-circumferential decompression" method. We evaluated improvements in back radiating pain visual analogue scale (VAS) Oswestry Disability Index (ODI). also occurrence instability on radiological exam percentage slip angle.The mean VAS score decreased significantly from 6.3 4.3, although some had residual pain. The 8.3 2.5. ODI improved 25.3 preoperatively 10.8 postoperatively. No significant change was observed (10% vs. 12.2% at last follow-up). dynamic (gap between flexion extension X-ray exams) did not (5.2% 5.8%). Slip angle (3.2° 8.2° 3.6° 9.2°, respectively).The results suggested that is clinically recommendable procedure can improve This does cause when treating