Evidence map›Paper›PMID 31773186›Full record

ArticleInternational orthopaedics2020

Learning curve and clinical outcomes of percutaneous endoscopic transforaminal decompression for lumbar spinal stenosis.

Jin Yang, Chuan Guo, Qingquan Kong, Bin Zhang, Yu Wang, Lifeng Zhang, Hao Wu, Zhiyu Peng, Yuqing Yan, Dongfeng Zhang

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Article in International orthopaedics, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
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17citing papers in PubMed, 1 pooled it
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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

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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

17 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  4. Classification of endoscopic spine procedures.North American Spine Society journal · 2025
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  5. Percutaneous endoscopic lumbar partial laminectomy assisted by a new miniature parallel surgical robot system: a trial on a cadaveric specimen.Wideochirurgia i inne techniki maloinwazyjne = Videosurgery and other miniinvasive techniques · 2025
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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

10 authors.

Jin YangDepartment of Orthopedics Surgery, West China Hospital, Sichuan University, 37 Guoxue Lane, Chengdu, 610041, Sichuan, China.
Chuan GuoDepartment of Orthopedics Surgery, West China Hospital, Sichuan University, 37 Guoxue Lane, Chengdu, 610041, Sichuan, China.
Qingquan KongDepartment of Orthopedics Surgery, West China Hospital, Sichuan University, 37 Guoxue Lane, Chengdu, 610041, Sichuan, China. kqqspine@126.com.ORCID 0000-0002-0030-8019
Bin ZhangDepartment of Orthopedics Surgery, West China Hospital, Sichuan University, 37 Guoxue Lane, Chengdu, 610041, Sichuan, China.
Yu WangDepartment of Orthopedics Surgery, West China Hospital, Sichuan University, 37 Guoxue Lane, Chengdu, 610041, Sichuan, China.
Lifeng ZhangDepartment of Orthopedics Surgery, West China Hospital, Sichuan University, 37 Guoxue Lane, Chengdu, 610041, Sichuan, China.
Hao WuDepartment of Orthopedics Surgery, West China Hospital, Sichuan University, 37 Guoxue Lane, Chengdu, 610041, Sichuan, China.
Zhiyu PengDepartment of Orthopedics Surgery, West China Hospital, Sichuan University, 37 Guoxue Lane, Chengdu, 610041, Sichuan, China.
Yuqing YanDepartment of Orthopedics Surgery, West China Hospital, Sichuan University, 37 Guoxue Lane, Chengdu, 610041, Sichuan, China.
Dongfeng ZhangDepartment of Orthopedics Surgery, West China Hospital, Sichuan University, 37 Guoxue Lane, Chengdu, 610041, Sichuan, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo define and analyze the learning curve of percutaneous endoscopic transforaminal decompression (PETD) for lumbar spinal stenosis (LSS).

methodsFrom July 2015 to September 2016, 78 patients underwent PETD; one of whom was converted to open surgery, two were lost, and 75 were included in this study. Clinical results were assessed by using the Oswestry Disability Index (ODI) and visual analog scale (VAS). The learning curve was assessed by a logarithmic curve-fitting regression analysis. Of these 75 patients, 35 were defined as the "early" group, and 40 were defined as the "late" group for comparison.

resultsThe mean follow-up was 25.37 ± 4.71 months. The median operative time gradually decreased from 95 (interquartile range, IQR, 85-110) minutes for the early group to 70 (IQR, 60-80) minutes for the late group (P < .000), and an asymptote was reached after approximately 35 cases. After surgery, the VAS for leg pain (LP) and ODI decreased significantly and remained constant during the follow-up. However, the VAS of low back pain (LBP) increased mildly. The total complication rate was 6.6%. ODI, VAS of LP and of LBP, and complication rate did not significantly differ between two groups. Early ambulation and short hospital stay after surgery were achieved.

conclusionThe learning curve of PETD for LSS was assessed and good clinical results were achieved. The surgeon's experience with this technique correlated with reduced operation time. Proper patient selection, familiarity with pathological anatomy, and manipulation under endoscopic view may shorten the learning curve and decrease complications.

Indexed as

Learning CurveAgedDecompression, SurgicalEndoscopyFemaleHumansLumbar VertebraeMaleMiddle AgedNeurosurgical ProceduresOperative TimeSpinal StenosisTreatment OutcomeLearning curveLumbar spinal stenosisNon-fusion surgeryPercutaneous endoscopic transforaminal decompressionSurgery

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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.