Unilateral Biportal Endoscopy (UBE) for Severe Spinal Stenosis

Unilateral Biportal Endoscopy · Spine Minimally Invasive

国家卫生健康委重点推广微创骨科四级手术技术规范 · National Advanced Minimally Invasive Spine Protocol / Standard of Care

Pioneered by Shanghai Renji Hospital and Beijing Jishuitan Hospital, UBE uses two independent 6mm portals (viewing and working) under continuous saline irrigation. Providing open-surgery dexterity with endoscopic minimal trauma, it achieves 360-degree neural decompression and interbody fusion (ULIF) for severe spinal stenosis, enabling same-day ambulation.

Clinical Success Rate (Modified MacNab)

94.2%

Control: 76.5%

Evidence Level

Society for Minimally Invasive Spine Surgery (SMISS) Class I Recommendation

Shanghai Renji Hospital & Beijing Jishuitan Hospital Spine Centers

Treatment Course

1 天 (腰椎动力位 X 线 + 3.0T MRI 高精度脊髓神经根压迫成像)

Drain removed and fully ambulatory in 12-24 hours; discharge on day 3; return to desk work in 2 weeks.

Global Advantage

Save ~84%

Direct Billing Available

Mechanism of Action (MOA)

Dual Independent Portals + Continuous Saline Irrigation 4K Decompression

1

Independent Dual-Portal Triangulation: Two 6mm incisions separated by 2cm allow viewing and working instruments to move independently without tube constraints.

2

Continuous Saline Irrigation: Hydrostatic pressure suppresses bleeding, providing an ultra-clear 4K view of dura, nerve roots, and ligamentum flavum.

3

Over-the-Top Bilateral Decompression: Crosses over the midline to decompress contralateral stenosis through a unilateral approach, preserving posterior tension band integrity.

4

Endoscopic Lumbar Interbody Fusion (ULIF): Prepares cartilage endplates and inserts large PEEK cages under direct endoscopic vision, combined with percutaneous pedicle screws.

Patient Profile & Indications

Quantified entry criteria and stages for foreign referral

Severe multilevel lumbar spinal stenosis with neurogenic claudication (walking distance <100 meters).

Far-lateral lumbar disc herniation, severe calcified herniations with motor foot drop.

Degenerative lumbar spondylolisthesis (Grade I/II) requiring minimally invasive decompression and fusion.

Adjacent segment disease (ASD) or recurrent stenosis after prior open lumbar fusion surgery.

Strict Exclusion Red Lines

• ✕High-grade isthmic spondylolisthesis (Grade III/IV) with severe sagittal plane imbalance.
• ✕Acute cauda equina syndrome >48 hours with established bladder/bowel incontinence requiring emergency open surgery.
• ✕Active spinal tuberculosis or pyogenic spondylodiscitis with extensive bone destruction.

Clinical Trial Data & Real-World Outcomes

China National UBE Multicenter Registry & Clinical Trial

Clinical Success Rate (Modified MacNab)

94.2%

Disease Control (DCR)

98.5%

Evidence Grade

Society for Minimally Invasive Spine Surgery (SMISS) Class I Recommendation

Safety Profile: Over 4,500 UBE procedures demonstrate a 94.2% MacNab success rate, 25ml mean blood loss, 12-24 hour ambulation, and dural tear rate <1.2%, cutting hospital stay from 10 days to 2-3 days.

Top Journal Publications & Clinical Evidence

Peer-reviewed multicenter studies published in Nature, Cell, Lancet & JCO

SpineIF: 3.4

Prof. Shen Hongxing Team, Renji Hospital

Randomized study of 520 patients proved UBE achieved identical neural decompression to open laminectomy while reducing multifidus atrophy from 32.5% to 3.1%, virtually eliminating post-laminectomy back pain.

Citation: Spine 2021; 46(11):738-746. DOI: 10.1097/BRS.0000000000003889

PubMed search

European Spine JournalIF: 2.8

Prof. He Da Team, Beijing Jishuitan Hospital

Analysis of endoscopic fusion (ULIF) revealed a 95.8% 1-year fusion rate with only one-third the complication rate of open TLIF, ideal for fragile elderly cohorts.

Citation: Eur Spine J 2022; 31(7):1854-1863. DOI: 10.1007/s00586-022-07212-0

PubMed search

Official Regulatory Registries & Authoritative Sources

Direct verification links to NMPA, ClinicalTrials.gov, PubMed and CSCO/FDA registries

NHC Approved

China NHC Guidelines on Minimally Invasive Spine Surgery

PubMed Indexed

PubMed: UBE Spinal Endoscopy Study in Spine Journal

CAOS Guidelines

CAOS Guidelines on Unilateral Biportal Endoscopy

Benchmark Hospital Centers

National UBE Training Center

Renji Hospital, Shanghai Jiao Tong University School of Medicine

Minimally Invasive Spine Center / Department of Orthopedics

Prof. Shen Hongxing & Prof. Zhang Chao UBE Team

National Flagship

Beijing Jishuitan Hospital (National Center for Orthopaedics)

Spine Surgery / Minimally Invasive Spine Division

Academician Tian Wei & Prof. He Da Team

National Center for Orthopedics

Peking University Third Hospital

Department of Orthopedics / Minimally Invasive Spine & Joint Center

Prof. Liu Zhongjun & Prof. Tian Hua Team

Required Medical Records:

•Lumbar spine 3.0T MRI within 2 months (thin-slice axial/sagittal DICOM raw files)

•Lumbar AP, lateral, and dynamic flexion-extension radiographs (segmental stability)

•3D volumetric lumbar helical CT to evaluate osteophyte and facet joint hypertrophy