Biportal Endoscopy Spine Surgery (BESS )Versus Unilateral Laminotomy Bilateral Decompression (ULBD ): RCT, Non-inferiority Trial
Outcomes Following Bilateral Decompression Surgery in Lumbar Spinal Stenosis With Biportal Endoscopy Versus Unilateral Laminotomy Technique: A Prospective, Single-blinded, Randomized Controlled Non-inferiority Trial
Sponsor: Seoul National University Hospital
Listed as NCT03302507, this NA trial focuses on Degenerative Lumbar Spinal Stenosis and remains completed. Sponsored by Seoul National University Hospital, it has been updated 10 times since 2017, reflecting substantial change activity. This study adds to the evidence base for this therapeutic area through structured, versioned documentation.
Status Flow
Change History
10 versions recorded-
Sep 2025 — Present [monthly]
Completed NA
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Sep 2024 — Sep 2025 [monthly]
Completed NA
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Jul 2024 — Sep 2024 [monthly]
Completed NA
-
Jan 2021 — Jul 2024 [monthly]
Completed NA
-
Nov 2019 — Jan 2021 [monthly]
Completed NA
Status: Active Not Recruiting → Completed
▶ Show 5 earlier versions
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May 2019 — Nov 2019 [monthly]
Active Not Recruiting NA
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Aug 2018 — May 2019 [monthly]
Active Not Recruiting NA
Status: Enrolling By Invitation → Active Not Recruiting
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Jun 2018 — Aug 2018 [monthly]
Enrolling By Invitation NA
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Mar 2018 — Jun 2018 [monthly]
Enrolling By Invitation NA
Status: Not Yet Recruiting → Enrolling By Invitation
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Oct 2017 — Mar 2018 [monthly]
Not Yet Recruiting NA
First recorded
Eligibility Summary
No eligibility information available.
Contact Information
- Seoul National University Hospital
For direct contact, visit the study record on ClinicalTrials.gov .