146 - A Comparative Analysis of Bi-Portal Endoscopic Spine Surgery and Microscopic Unilateral Laminotomy for Bilateral Decompression in Multilevel Lumbar Stenosis Patients

Saturday, June 3, 2023

12:10 PM – 12:12 PM

Location: Salons 13-15

Presenting Author (Person doing the Podium Present(s)

SP

Sub-Ri Park, n/a

Department of Orthopaedic surgery, Yonsei University College of Medicine, Republic of Korea

Co-Author(s)

KS

Kyung-Soo Suk

Professor
Department of Orthopaedic Surgery, Yonsei University College of Medicine, Seoul-t'ukpyolsi, Republic of Korea
HK

Hak-Sun Kim

Professor
Department of Orthopedic Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea, Seoul-t'ukpyolsi, Republic of Korea
SM

Seong-Hwan Moon

Professor
Department of Orthopedic Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea, Seoul-t'ukpyolsi, Republic of Korea
SP

Si-Young Park

Professor
Department of Orthopedic Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea, Seoul-t'ukpyolsi, Republic of Korea
BL

Byungho Lee

Professor
orthopedic spinal surgery, Gangnam Severance hospital, college of medicine, Yonsei university, Seoul-t'ukpyolsi, Republic of Korea
JP

Jin-Oh Park

Department of Orthopaedic surgery, Yonsei University College of Medicine, United States
SP

Sang-Jun Park

Department of Orthopaedic surgery, Yonsei University College of Medicine, United States
JK

Ji-Won Kwon

Department of Orthopaedic Surgery, Yonsei University College of Medicine, United States
DE

Dong-Chan Eun

Department of Orthopaedic surgery, Yonsei University College of Medicine, United States
YL

Yong-Ho Lee

Department of Orthopaedic surgery, Yonsei University College of Medicine, United States

Submitter(s)

SP

Sub-Ri Park, n/a

Department of Orthopaedic surgery, Yonsei University College of Medicine, Republic of Korea

Disclosure(s):

Byungho Lee: No financial relationships to disclose

The clinical and radiological results before and after surgery were compared and analyzed for patients with multilevel lumbar stenosis who underwent bi-portal endoscopic spine surgery (BESS) and microscopic unilateral laminotomy for bilateral decompression (ULBD). We retrospectively identified 47 and 49 patients who underwent BESS and microscopic ULBD, respectively, who were diagnosed with multi-level lumbar stenosis. Clinical outcomes were evaluated using the visual analog scale score for both back and leg pain, and medication (pregabalin) use and Oswestry Disability Index (ODI) scores for overall treatment outcomes were used pre-operatively and at the final follow-up. Radiological outcomes were evaluated as the percentage of dura expansion volume, and percentage preservation of both facets and both lateral recess angles. The follow-up period of patients was about 17.04 months in the BESS group and about 16.90 months in the microscopic ULBD group. The back and leg visual analog scale (VAS) scores and average pregabalin use decreased more significantly in the BESS group than in the microscopic ULBD group (each p -value 0.0443, < 0.001, 0.0378). All radiological outcomes were significantly higher in the BESS group than in the ULBD group. The change in ODI in two-level spinal stenosis showed a significantly higher value in the BESS group compared to the microscopic ULBD group (p-value 0.0335). Multilevel decompression with the BESS technique in multiple spinal stenosis is an adequate technique as it shows better clinical and radiological results than microscopic ULBD during a short-term follow-up period.