deltatrials
Completed NA INTERVENTIONAL 2-arm NCT03302507

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

Interventions BESS ULBD
Updated 10 times since 2017 Last updated: Oct 10, 2019 Started: Nov 1, 2017 Primary completion: Jun 30, 2019 Completion: Oct 1, 2019
This information is for research purposes only and is not medical advice. Consult a healthcare provider before making any medical decision.

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

~Oct 2017 – ~Mar 2018 · 5 months · monthly snapshotNot Yet Recruiting~Mar 2018 – ~Jun 2018 · 3 months · monthly snapshotEnrolling By Invitation~Jun 2018 – ~Aug 2018 · 2 months · monthly snapshotEnrolling By Invitation~Aug 2018 – ~May 2019 · 9 months · monthly snapshotActive Not Recruiting~May 2019 – ~Nov 2019 · 6 months · monthly snapshotActive Not Recruiting~Nov 2019 – ~Jan 2021 · 14 months · monthly snapshotCompleted~Jan 2021 – ~Jul 2024 · 42 months · monthly snapshotCompleted~Jul 2024 – ~Sep 2024 · 2 months · monthly snapshotCompleted~Sep 2024 – ~Sep 2025 · 12 months · monthly snapshotCompleted~Sep 2025 – present · 10 months · monthly snapshotCompleted

Change History

10 versions recorded
  1. Sep 2025 — Present [monthly]

    Completed NA

  2. Sep 2024 — Sep 2025 [monthly]

    Completed NA

  3. Jul 2024 — Sep 2024 [monthly]

    Completed NA

  4. Jan 2021 — Jul 2024 [monthly]

    Completed NA

  5. Nov 2019 — Jan 2021 [monthly]

    Completed NA

    Status: Active Not RecruitingCompleted

Show 5 earlier versions
  1. May 2019 — Nov 2019 [monthly]

    Active Not Recruiting NA

  2. Aug 2018 — May 2019 [monthly]

    Active Not Recruiting NA

    Status: Enrolling By InvitationActive Not Recruiting

  3. Jun 2018 — Aug 2018 [monthly]

    Enrolling By Invitation NA

  4. Mar 2018 — Jun 2018 [monthly]

    Enrolling By Invitation NA

    Status: Not Yet RecruitingEnrolling By Invitation

  5. Oct 2017 — Mar 2018 [monthly]

    Not Yet Recruiting NA

    First recorded

Eligibility Summary

No eligibility information available.

Contact Information

Sponsor contact:
  • Seoul National University Hospital
Data source: Seoul National University Hospital

For direct contact, visit the study record on ClinicalTrials.gov .

Study Locations