J Korean Soc Geriatr Neurosurg > Volume 16(1); 2020 > Article
Journal of Korean Society of Geriatric Neurosurgery 2020;16(1):42-46.
DOI: https://doi.org/10.51638/jksgn.20.00297    Published online September 30, 2020.
Surgical Outcomes of Microscopic versus Unilateral Biportal Endoscopic Decompression for Lumbar Spinal Stenosis: A Preliminary Report
Jun Hong Lee, Sung Ik Cho, Chung Kee Chough
Department of Neurosurgery, Yeouido St. Mary’s Hospital, The Catholic University of Korea, Seoul, Korea
Correspondence:  Chung Kee Chough, Tel: +82-2-3779-1187, Fax: +82-2-786-5809, 
Email: chough@catholic.ac.kr
Abstract
Objective
The objective of this study was to compare clinical outcomes and length of hospitalization between microscopic decompression and unilateral biportal endoscopic (UBE) decompression for lumbar spinal stenosis.
Methods
Medical records of patients with lumbar spinal stenosis who underwent microscopic fenestration and unilateral laminotomy bilateral decompression (ULBD) via UBE from January 2017 to May 2019 were reviewed retrospectively. Clinical outcomes were reviewed regarding preoperative and postoperative visual analogue scale of back pain (VAS-B), visual analogue scale of leg pain (VAS-L) and Oswestry Disability Index of the lumbar spine (ODI) scores. Length of hospitalization, postoperative total drainage volume, and type and incidence of complications were also reviewed.
Results
A total of 103 patients (44 microscopic fenestration and 59 ULBD via UBE) was selected. The mean age of the two groups was the same. The preoperative and postoperative clinical results of the two groups showed no significant difference, and the mean operation time and complications were similar in the groups. The microscopic fenestration group (10.37 days) had longer hospitalization than the ULBD via UBE group (7.53 days, p=0.01) and larger postoperative drainage volume (157.10 cc) than the ULBD via UBE group (83.50 cc, p<0.01).
Conclusion
These two surgical procedures showed no significant difference in clinical outcome, but the ULBD via UBE group had shorter hospitalization, allowing patients to return to their daily lives earlier. These improved recovery after surgery suggests that ULBD via UBE could be a viable surgical option for geriatric patients with lumbar spinal stenosis.
Key Words: Biportal endoscopic, Decompression, Lumbar stenosis, Microscopic, Minimally invasive s


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