• Pengfei Li, Zhen Shi, Yunduo Jiang, Zhibin Peng, and Yansong Wang.
• Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin Medical University, Harbin, China.
• World Neurosurg. 2024 Jul 1; 187: e129e135e129-e135.

PurposeThis study aims to observe the safety and effectiveness of 10-mm endoscopic minimally invasive interlaminar decompression in the treatment of ossified lumbar spinal stenosis.MethodsThe clinical data of 50 consecutive patients with ossified lumbar spinal stenosis were retrospectively analyzed. All patients underwent minimally invasive interlaminar decompression with 10-mm endoscope. Patient demographics, perioperative data, and clinical outcomes were recorded. Visual analog scale scores, Oswestry disability index scores, and modified Macnab criteria were used to assess clinical outcomes. The lateral recess angle, real spinal canal area, and effective intervertebral foramen area were used to assess the effect of decompression.ResultsThe mean age of all patients was 59.0 ± 12.3 years. The mean operative time and intraoperative blood loss were 43.7 ± 8.7 minutes and <20 ml, respectively. Two years after surgery, the leg pain Visual analog scale score decreased from 7.4 ± 1.0 to 1.6 ± 0.6 (P < 0.05) and the Oswestry disability index score decreased from 63.8 ± 7.6 to 21.7 ± 3.4 (P < 0.05). The lateral recess angle, real spinal canal area and effective intervertebral foramen area were significantly larger than before surgery (P < 0.05). The overall excellent and good rate at the last follow-up was 92.0% according to the modified Macnab criteria.ConclusionsThe 10-mm endoscopic minimally invasive interlaminar decompression can safely and effectively remove the ossification in the spinal canal and achieve adequate decompression in patients with ossified lumbar spinal stenosis.Copyright © 2024 Elsevier Inc. All rights reserved.

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