Evidence map›Paper›PMID 35710725›Full record

ArticleInternational journal of spine surgery2022

Prevalence and Modes of Posterior Hardware Failure With a Staged Protocol for Circumferential Minimally Invasive Surgical Correction of Adult Spinal Deformity: A 13-Year Experience.

Neel Anand, Andrew Chung, Christopher Kong, Alisa Alayan, Babak Khandehroo, Sheila Kahwaty, David Gendelberg

Open access · diamondAbstract read
In one paragraph

Article in International journal of spine surgery, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed, 2 pooled it
1.3field-weighted citation impact, top 21% 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, 2 syntheses or guidelines pooled it, 7 citations in OpenAlex.

  1. S2AI and iliac screw prominence and removal for symptomatic prominence: a systematic review.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
  2. Spinopelvic fixation failure in the adult spinal deformity population: 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
  3. Article
  4. Article
  5. Review
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

7 authors at 2 institutions in 1 country.

Neel AnandDepartment of Orthopedics, Cedars-Sinai Spine Center, Los Angeles, CA, USA.
Andrew ChungSonoran Spine Institute, Tempe, AZ, USA asc@sonoranspine.com.
Christopher KongDepartment of Orthopedics, Cedars-Sinai Spine Center, Los Angeles, CA, USA.
Alisa AlayanDepartment of Orthopedics, Cedars-Sinai Spine Center, Los Angeles, CA, USA.
Babak KhandehrooDepartment of Orthopedics, Cedars-Sinai Spine Center, Los Angeles, CA, USA.
Sheila KahwatyDepartment of Orthopedics, Cedars-Sinai Spine Center, Los Angeles, CA, USA.
David GendelbergDepartment of Orthopedics, Cedars-Sinai Spine Center, Los Angeles, CA, USA.
Cedars-Sinai Medical Center · USSonoran Spine Research and Education Foundation · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundOne of the common complications of adult spinal deformity (ASD) correction is the failure to relieve pain. This may result from the failure of implanted hardware to provide adequate stabilization. While numerous studies exist, characterizing complications that can occur with minimally invasive correction of ASD and data regarding hardware failure in this setting are limited.

objectiveThis article characterizes the rate and mode of posterior hardware failure in the setting of circumferential minimally invasive surgery (CMIS) for ASD correction.

methodsPatients undergoing staged CMIS correction of ASD from January 2007 to September 2018 were identified. Patients with a minimum 2-year follow-up were included in the study.

resultA total of 263 patients (168 women and 95 men) were included in the study. The mean age of patients was 64 years (21-85, SD 13.7), and the mean length of follow-up was 90 months (24-164, SD 40.2). An average of 6 levels (3-16, SD 3.15) was fused per patient.Eight patients had a mechanical hardware failure and required revision surgery (3.04%). No catastrophic failures were noted in our series. Hardware failures were characterized as follows: 2 patients with broken screws, 5 patients with loose screws, and 1 patient who had symptomatic T12-L1 and L5-S1 nonunion with bilateral distal rod fractures, iliac set screw loosening, and proximal T12 screw loosening. Following revision surgery, all of these patients had confirmed solid fusion on computed tomography (CT) scan at their latest follow-up visit.Interestingly, 3 other patients had loosening of the set screw on their iliac bolts. Five patients had rod fractures between L5 and S1 or below S1. All 8 of these patients were asymptomatic with confirmed fusion at L5-S1 on CT scans.

conclusionThe prevalence of clinically significant hardware failure needing revision in our series was low at 3.04%. Symptomatic hardware prominence requiring revision was 2.3%. Specifically, rod fractures were not common (2.2%). Our study suggests that in the appropriately selected patient, CMIS to correct ASD without osteotomies may result in acceptable rates of hardware failure. Future studies should compare the results of CMIS deformity correction to a matched population of patients undergoing open deformity correction. CLINICAL RELEVANCE: This study suggests that in the appropriately selected patient, CMIS to correct ASD without osteotomies may result in acceptable rates of hardware failure. LEVEL OF EVIDENCE: 4:

Indexed as

adultfailurehardwareminimally invasivespinal deformity

Identifiers

PMID35710725
PMCPMC9650186
OpenAlexW4283022237

What OpenQuestion holds

Textmetadata
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.