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Please use this identifier to cite or link to this item: http://hdl.handle.net/10564/3778

Title: The Influence of Posture on Instability Evaluation Using Flexion-Extension X-Ray Imaging in Lumbar Spondylolisthesis.
Other Titles: 腰椎すべり症における動態X線画像を用いた不安定性評価に対する姿勢の影響
Authors: Inoue, Daisuke
Shigematsu, Hideki
Nakagawa, Yoshiyuki
Takeshima, Toshichika
Tanaka, Yasuhito
Keywords: Lumbar
Spondylolisthesis
Flexion–extension X-ray
Magnetic resonance imaging
Visual Analog Scale
Issue Date: 22-Sep-2020
Publisher: Korean Society of Spine Surgery
Citation: Asian spine journal Online ahead of print (2020 Sep 22)
Abstract: Study design: Prospective clinical study. Purpose: To determine the optimal posture for instability evaluation using flexion-extension X-ray imaging in patients with lumbar spondylolisthesis. Overview of literature: Currently, flexion-extension X-ray imaging is the most practical approach for the evaluation of lumbar instability. In flexion-extension X-ray imaging, achievement of the greatest segmental motion with flexion-extension movement is necessary. However, to our knowledge, currently, there is no standardized posture for determining lumbar instability. Methods: Twenty-three individuals with lumbar spondylosis related to the fourth vertebra underwent flexion-extension X-ray imaging in different postures (standing, sitting, and lateral decubitus positions), lumbar magnetic resonance imaging (MRI), and low back pain Visual Analog Scale (VAS) evaluation on the same day. Intervertebral angle, percent slippage, and intervertebral disc area ratio for different postures during flexion and extension were compared using Tukey's method. The effect of low back pain and the association between MRI facet effusion and these measurements were investigated according to posture. Results: The percent slippage during extension (p=0.036), change in the percent slippage between flexion and extension (p=0.004), and change in the intervertebral angle (p=0.042) were significantly different between the sitting and lateral decubitus positions. There were also significant differences between the standing and lateral decubitus positions in the change in intervertebral angle (p=0.010). In patients with VAS score <40, there were significant differences in the intervertebral angle (p=0.011) between the standing and lateral decubitus positions, percent slippage (p=0.048), and intervertebral disk ratio (p=0.008) between the sitting and lateral decubitus positions. We found no relationship between MRI facet effusion and posture in terms of instability. Conclusions: In this study, intervertebral instability was best evaluated in the lateral decubitus position when using flexion-extension X-ray imaging for patients with fourth lumbar vertebral spondylolisthesis.
Description: 博士(医学)・甲第754号・令和2年9月30日
Copyright © 2020 by Korean Society of Spine Surgery
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
URI: http://hdl.handle.net/10564/3778
ISSN: 19761902
Academic Degrees and number: 24601A754
Degree-granting date: 2020-09-30
Degree name: 博士(医学)
Degree-granting institutions: 奈良県立医科大学
Appears in Collections:2020年度

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