Evidence map›Paper›PMID 31768449›Full record

ArticleSpine surgery and related research2019

Reoperation Rates after Laminoplasty for Cervical Disorders: A 26-Year Period Survival Function Method Analysis.

Ko Hashimoto, Toshimi Aizawa, Hiroshi Ozawa, Yasuhisa Tanaka, Takashi Kusakabe, Naoki Morozumi, Yutaka Koizumi, Tetsuro Sato, Hironori Hyodo, Tomowaki Nakagawa and 8 more

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Article in Spine surgery and related research, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed, 1 pooled it
1.3field-weighted citation impact, top 19% 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

5 citing papers in PubMed, 1 synthesis or guideline pooled it, 8 citations in OpenAlex.

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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

18 authors at 9 institutions in 2 countries.

Ko HashimotoDepartment of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
Toshimi AizawaDepartment of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
Hiroshi OzawaDepartment of Orthopaedic Surgery, Tohoku Medical and Pharmaceutical University, Sendai, Japan.
Yasuhisa TanakaDepartment of Orthopaedic Surgery, Tohoku Central Hospital, Yamagata, Japan.
Takashi KusakabeDepartment of Orthopaedic Surgery, Tohoku Rosai Hospital, Sendai, Japan.
Naoki MorozumiDepartment of Orthopaedic Surgery, Sendai Nishitaga Hospital, Sendai, Japan.
Yutaka KoizumiDepartment of Orthopaedic Surgery, Sendai Nishitaga Hospital, Sendai, Japan.
Tetsuro SatoDepartment of Orthopaedic Surgery, Sendai Orthopaedic Hospital, Sendai, Japan.
Hironori HyodoDepartment of Orthopaedic Surgery, Sendai Orthopaedic Hospital, Sendai, Japan.
Tomowaki NakagawaDepartment of Orthopaedic Surgery, Sendai Orthopaedic Hospital, Sendai, Japan.
Eiji TakahashiDepartment of Orthopaedic Surgery, Sendai Orthopaedic Hospital, Sendai, Japan.
Takeshi HoshikawaDepartment of Orthopaedic Surgery, Tohoku Central Hospital, Yamagata, Japan.
Hideki ImaizumiDepartment of Orthopaedic Surgery, Osaki Citizen Hospital, Miyagi, Japan.
Shinji OgawaDepartment of Orthopaedic Surgery, Sendai Medical Center, Sendai, Japan.
Fumio KasamaDepartment of Orthopaedic Surgery, Matsuda Hospital, Sendai, Japan.
Haruo KannoDepartment of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
Eiji ItoiDepartment of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
Shoichi KokubunResearch Center for Spine and Spinal Cord Disorders, Sendai Nishitaga Hospital, Sendai, Japan.
Orthopaedic Hospital · USSendai Nishitaga National Hospital · JPTohoku University · JPTohoku University Hospital · JPIjinkai Takeda General Hospital · JPOsaki Citizen Hospital · JPSendai Medical Center · JPTohoku Medical and Pharmaceutical University · JPTohoku Rosai Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionLaminoplasty is a common surgery for cervical myelopathy. Previous studies have analyzed the reoperation rates in posterior decompression surgeries of the cervical spine. However, few studies have solely focused on midline-splitting laminoplasty (MSL) using a large number of patients. This aims to analyze the reoperation rates after MSL using the survival function method.

methodsBetween 1988 and 2013, 4,208 MSLs were performed as a primary operation for cervical myelopathy and enrolled in our spinal surgery registration system. The Kaplan-Meier survival function method was used to analyze the rates of reoperation.

resultsOf 4,208 patients with primary MSL, 40 underwent reoperation for neurological complications. The overall reoperation rate was 0.26%, 0.64%, 0.83%, 0.93%, and 0.95% at 1, 5, 10, 20, and >20 years, respectively. The causes of reoperation were postoperative cervical radiculopathy in 10 patients, stenosis at an adjacent level in 8, stenosis due to failed "open-door" lamina in 6, instability of the cervical spine in 4, cervical disc herniation in 3, elongation of ossification of the posterior longitudinal ligament in 3, spinal cord injury in 1, fracture of the cervical spine in 1, postoperative scar formation in 1, ossification of anterior longitudinal ligament in 1, and unknown in 2. The number of patients with surgical site infection (SSI) who needed surgical debridement was 34 (0.81%).

conclusionsExcluding reoperations for SSI, the reoperation rate of MSL was approximately 1.0% at the maximum of 26 years after surgery. MSL was determined to be a reliable surgical procedure regarding postoperative complications requiring additional surgeries.

Indexed as

Cervical myelopathymidline-splitting laminoplastyreoperation ratesurvival function method analysis

Identifiers

PMID31768449
PMCPMC6834470
OpenAlexW2961046389

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LicenceCC BY-NC-ND
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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.