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Abstract Objective To investigate the feasibility and efficacy of endoscopic-unilateral laminectomy for bilateral decompression (Endo-ULBD) for the treatment of lumbar spinal stenosis.Methods From Jun 2018 to Jun 2019，24 patients(male 14，female 10)underwent Endo-ULBD were retrospectively analyzed.The age ranges from 42 to 78，with an average age of (58.5±10.8).Visual analogue scale and Oswestry disability index before operation were compared with those 1 day，1 month，6 month after operation.Modified MacNab criterion evaluated at the last follow-up postoperatively was used to identify the clinical efficacy.Results All the 24 patients were followed up.The operation time ranged from 75 to 155 min，with an average of (58±23) min.VAS score and ODI score postoperatively were significantly improved compared with preoperative ones (P＜0.05).Modified MacNab criterion evaluated postoperatively indicated an efficacy of 13 excellent cases，8 good，2 fair and 1 poor.Conclusion Endo-ULBD is a safe and efficient technique for the treatment of lumbar spinal stenosis.
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