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. 2021 Feb 26;7:596327. doi: 10.3389/fsurg.2020.596327

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Copyright © 2021 Hua, Wang, Ke, Xiang, Wu, Zhang, Li, Yang, Wu and Yang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Surgical procedures of lumbar endoscopic unilateral laminotomy bilateral decompression (LE-ULBD). (A,B) The inferior edge of the cranial lamina and the base of the spinous process of the ipsilateral side were removed by the endoscopic burr; (C) undercutting of the contralateral cranial lamina was performed; (D) the ipsilateral and contralateral ligamentum flavum was identified and removed piecemeal with endoscopic punches and forceps; (E) the ipsilateral medial facetectomy was performed to decompress the lateral recess and ensure adequate decompression of the traversing nerve root; (F) the contralateral medial facetectomy was performed to decompress the lateral recess and ensure adequate decompression of the traversing nerve root.