Evidence map›Paper›PMID 35996762›Full record

ArticleNeurospine2022

Learning Curve and Complications of Unilateral Biportal Endoscopy: Cumulative Sum and Risk-Adjusted Cumulative Sum Analysis.

Jinchao Xu, Dong Wang, Jidan Liu, Chengyue Zhu, Jianhang Bao, Wenshuo Gao, Wei Zhang, Hao Pan

Open access · diamondAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Neurospine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 80 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
80citing papers in PubMed, 5 pooled it
14.1field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

80 citing papers in PubMed, 5 syntheses or guidelines pooled it, 102 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Learning curve insights in Unilateral Biportal Endoscopic (UBE) spinal procedures: proficiency cutoffs and the impact on efficiency and complications.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2025
    Pooled it
  4. Unilateral biportal endoscopic discectomy versus microdiscectomy for lumbar disc herniation: a systematic review and meta-analysis.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2024
    Pooled it
  5. Pooled it
  6. Trial
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  8. Article
  9. Validation of a modular low-fidelity training model for biportal endoscopic spine surgery.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026
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  15. Review
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  19. [Effectiveness comparison of transforaminal endoscopy and unilateral biportal endoscopy for far lateral lumbar disc herniation].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2026
    Article
  20. Article

20 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 1 institution in 1 country.

Jinchao XuZhejiang Chinese Medical University, Hangzhou, Zhejiang, China.
Dong WangDepartment of Orthopaedics, Hangzhou Traditional Chinese Medical Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China.
Jidan LiuZhejiang Chinese Medical University, Hangzhou, Zhejiang, China.
Chengyue ZhuDepartment of Orthopaedics, Hangzhou Traditional Chinese Medical Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China.
Jianhang BaoZhejiang Chinese Medical University, Hangzhou, Zhejiang, China.
Wenshuo GaoZhejiang Chinese Medical University, Hangzhou, Zhejiang, China.
Wei ZhangDepartment of Orthopaedics, Hangzhou Traditional Chinese Medical Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China.
Hao PanDepartment of Orthopaedics, Hangzhou Traditional Chinese Medical Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China.
Zhejiang Chinese Medical University · CN

Funding

Medical Health Science and Technology project of Zhejiang Province 2022KY997National Key R&D Program of China 2019YFC0121400
6 · The paper itself

Abstract

objectiveThe purpose of this study was to investigate the learning curve and complications of unilateral biportal endoscopy (UBE) in the treatment of lumbar disc herniation (LDH) and lumbar spinal stenosis (LSS).

methodsThis was a retrospective cohort analysis of 197 consecutive patients who received UBE unilateral laminotomy bilateral decompression (UBE-ULBD) or lumbar discectomy (UBE-LD) surgery, including 107 males and 90 females with an average age of 64.83 ± 14.29 years. Cumulative sum (CUSUM) and risk-adjusted cumulative sum analysis (RA-CUSUM) were used to evaluate the learning curve, with the occurrence of complications defined as surgical failure, and variables of different phase of the learning curve were compared.

resultsThe cutoff point of learning curve of UBE surgery was 54 cases according to CUSUM analysis. The learning curve of UBE-ULBD and UBE-LD were divided into 3 phases. The first cutoff points were 31 and 12 cases, and the second cutoff point were 67 and 32 cases respectively. With the progress of the learning curve, the operation time and postoperative hospital stays decreased. The visual analogue scale and Oswestry Disability Index at the last follow-up were significantly lower than that before surgery. The incidence of surgical failure was 6.11% and began to decrease after the 89th case based on RA-CUSUM analysis. The surgical failure rate decreased from 10.11% to 2.78 after the 89th case with significant different.

conclusionUBE surgery is effective in the treatment of LDH and LSS with low incidence of complications. But a learning curve of at least 54 cases still required for mastering UBE surgery.

Indexed as

Learning curveLumbar disc herniationLumbar spinal stenosisUnilateral biportal endoscopy

Identifiers

PMID35996762
PMCPMC9537833
OpenAlexW4291565040

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.