Evidence map›Paper›PMID 40551242›Full record

Trial reportJournal of orthopaedic surgery and research2025

Does the number of drain tubes influence the formation of postoperative spinal epidural hematoma following biportal endoscopic unilateral laminotomy for bilateral decompression (BE-ULBD) in patients with two-level adjacent lumbar spinal stenosis? a prospective randomized study.

Zhuolin Zhong, Jingjing Ying, Shaohua Zhang, Kaili Cai, Xiaowei Jing, Zhengyu Xu, Lejian Jiang, Tianxin Wu, Guojun Wei, Qingfeng Hu

Registry-linked trialAbstract readRandomized Controlled Trial
PubMed Full text at PMC Publisher
In one paragraph

Trial report in Journal of orthopaedic surgery and research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06290791 (Does a Drain Tube Influence the Postoperative Epidural Haematoma for Lumbar Biportal Endoscopic Surgery? A Randomized, Controlled Trial), which is not on this map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
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.

NCT06290791 nacompletednot on this map

Does a Drain Tube Influence the Postoperative Epidural Haematoma for Lumbar Biportal Endoscopic Surgery? A Randomized, Controlled Trial

TypeinterventionalSponsorThe Fourth Affiliated Hospital of Zhejiang University School of MedicineRan2020 to 2024Enrolled89ConditionsDrain Tube Influence the Postoperative Epidural HaematomaArmstwo level lumbar decompression with BESS procedure received one drain., two level lumbar decompression with BESS procedure received two drain.
3 · Its place in the literature

Who cites it

3 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
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.

Zhuolin ZhongDepartment of Orthopedics, The Fourth Affiliated Hospital of School of Medicine, and International School of Medicine, International Institutes of Medicine, Zhejiang University, No. N1, Shangcheng Road, Yiwu, 322000, China.
Jingjing YingDepartment of Orthopedics, The Second Affiliated Hospital of Zhejiang University School of Medicine, Zhejiang University, No. 88, Jiefang Road, Hangzhou, 310009, China.
Shaohua ZhangDepartment of of Science and Education, the Fourth Affiliated Hospital of School of Medicine, and International School of Medicine, International Institutes of Medicine, Zhejiang University, No. N1, Shangcheng Road, Yiwu, 322000, China.
Kaili CaiDepartment of of Science and Education, the Fourth Affiliated Hospital of School of Medicine, and International School of Medicine, International Institutes of Medicine, Zhejiang University, No. N1, Shangcheng Road, Yiwu, 322000, China.
Xiaowei JingDepartment of Orthopedics, The Fourth Affiliated Hospital of School of Medicine, and International School of Medicine, International Institutes of Medicine, Zhejiang University, No. N1, Shangcheng Road, Yiwu, 322000, China.
Zhengyu XuDepartment of Orthopedics, The Fourth Affiliated Hospital of School of Medicine, and International School of Medicine, International Institutes of Medicine, Zhejiang University, No. N1, Shangcheng Road, Yiwu, 322000, China.
Lejian JiangDepartment of Orthopedics, The Fourth Affiliated Hospital of School of Medicine, and International School of Medicine, International Institutes of Medicine, Zhejiang University, No. N1, Shangcheng Road, Yiwu, 322000, China.
Tianxin WuDepartment of Orthopedics, The Fourth Affiliated Hospital of School of Medicine, and International School of Medicine, International Institutes of Medicine, Zhejiang University, No. N1, Shangcheng Road, Yiwu, 322000, China.
Guojun WeiDepartment of Orthopedics, The Fourth Affiliated Hospital of School of Medicine, and International School of Medicine, International Institutes of Medicine, Zhejiang University, No. N1, Shangcheng Road, Yiwu, 322000, China.
Qingfeng HuDepartment of Orthopedics, The Fourth Affiliated Hospital of School of Medicine, and International School of Medicine, International Institutes of Medicine, Zhejiang University, No. N1, Shangcheng Road, Yiwu, 322000, China. 8021009@zju.edu.cn.

Funding

National Natural Science Foundation of China 82272615
6 · The paper itself

Abstract

backgroundThe formation of postoperative spinal epidural hematoma (POSEH) following lumbar spinal surgery is a potentially serious complication. The efficacy and necessity of prophylactic postoperative drain tubes in preventing symptomatic postoperative spinal epidural hematoma (SPOSEH) after lumbar spinal decompression remain subjects of ongoing debate. The objective of this study is to investigate the potential impact of the number of drain tubes on POSEH following biportal endoscopic unilateral laminotomy for bilateral decompression (BE-ULBD) in patients of two-level adjacent lumbar spinal stenosis.

methodsA prospective randomized study was conducted involving 89 patients with two-level adjacent lumbar spinal stenosis who underwent BE-ULBD. Patients were divided into two groups: Group A (one drain tube) and Group B (two drain tubes). Demographic data were collected, including preoperative visual analog scale (VAS) scores for leg pain and preoperative blood pressure (BP). Postoperative BP was recorded. The primary outcome was the cross-sectional area (CSA) of POSEH assessed at 72 h postoperatively. Secondary outcomes included postoperative VAS scores for leg pain, volume of drainage output, and length of hospital stay.

resultsA total of forty-three patients were assigned to Group A, while forty-six patients were assigned to Group B. The demographic characteristics of the patients in both groups were comparable. No significant differences were observed between the two groups regarding the CSA of POSEH. However, a significantly greater volume was noted in Group B (P = 0.015). There were no significant differences between the groups for other secondary outcomes, including postoperative VAS scores for leg pain (P = 0.584), and length of hospital stay (P = 0.428).

conclusionsMore drain tubes may result in statistically significant output but not clinically significant differences in influencing the formation of POSEH following BE-ULBD for two-level adjacent lumbar spinal stenosis.

trial registrationThe study was retrospectively registered in ClinicalTrials.gov on March 1, 2024, with the registration number NCT06290791.

Indexed as

Decompression, SurgicalDrainageHematoma, Epidural, SpinalLaminectomyLumbar VertebraePostoperative ComplicationsSpinal StenosisAgedEndoscopyFemaleHumansMaleMiddle AgedProspective StudiesTreatment OutcomeDecompression surgeryDrain tubeLumbar spinal stenosisSpinal epidural hematoma

Identifiers

PMID40551242
PMCPMC12186364

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Registered trials

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.