Measurement of spinopelvic sagittal alignment in the relaxed seated position rather than in the straight seated position is suitable for assessing spinopelvic mobility in patients before total hip arthroplasty.

IF 1.8 Q2 ORTHOPEDICS SICOT-J Pub Date : 2023-01-01 DOI:10.1051/sicotj/2022051
Yohei Ohyama, Kentaro Iwakiri, Yoichi Ohta, Yukihide Minoda, Akio Kobayashi, Hiroaki Nakamura
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引用次数: 1

Abstract

Purpose: The relationship between spinopelvic mobility and dislocation in total hip arthroplasty (THA) has recently attracted attention. This study aimed to investigate the differences in sacral slope (SS) between two types of upright seated positions and to determine which seated position was appropriate for assessing spinopelvic mobility (change in SS from standing to sitting) before THA.

Materials and methods: This prospective cohort study included 75 hips from 75 patients who had undergone primary THA. Each patient underwent preoperative lateral spinopelvic radiography in standing (st) and two seated positions: relaxed (rs) and straight (ss). The change in SS between each position (Δ) was measured.

Results: Differences in all spinopelvic sagittal alignment parameters between the two seated positions were statistically significant (p < 0.001). The range, median, and mean values of ΔSSss-rs were -2.0° to 26.5°, 6.8°, and 8.3°, respectively. ΔSSss-rs was significantly correlated with SS, LLA, and PFA in the relaxed seated position (r = -0.52, -0.39, and 0.37; p < 0.001, p < 0.001, and p = 0.001, respectively), but was not correlated to these parameters in the straight seated position. Of the 52 patients with normal spinopelvic mobility in the relaxed seated position (ΔSSst-rs > 10°), 24 (46%) patients were misrepresented as having a stiff spine in the straight seated position (ΔSSst-ss < 10°).

Conclusion: The change in SS from the straight to the relaxed seated position widely varied in patients before THA. The spinopelvic radiograph in the relaxed seated position is appropriate when evaluating spinopelvic mobility for preoperative planning.

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在全髋关节置换术前,在放松坐姿下测量脊柱骨盆矢状位比在笔直坐姿下测量脊柱骨盆矢状位更适合评估患者的脊柱骨盆活动度。
目的:全髋关节置换术(THA)中脊柱骨盆活动与脱位的关系近年来引起了人们的关注。本研究旨在探讨两种直立坐姿骶骨斜率(SS)的差异,并确定哪种坐姿适合评估THA前脊柱骨盆活动度(SS从站立到坐姿的变化)。材料和方法:这项前瞻性队列研究包括75名接受原发性THA的患者的75髋。每位患者术前均在站立(st)和两种坐姿(rs)和直立(ss)下进行脊柱侧位x线摄影。测量每个位置之间的SS变化(Δ)。结果:两种坐位的所有椎盂矢状面对准参数差异均有统计学意义(p ss-rs分别为-2.0°至26.5°、6.8°和8.3°)。ΔSSss-rs与放松坐姿的SS、LLA、PFA显著相关(r = -0.52、-0.39、0.37;p st-rs > 10°),24例(46%)患者被误以为笔直坐姿时脊柱僵硬(ΔSSst-ss结论:THA前患者从笔直坐姿到放松坐姿的SS变化差异很大。脊柱骨盆x线片在评估脊柱骨盆活动能力时适合于术前计划。
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来源期刊
SICOT-J
SICOT-J ORTHOPEDICS-
CiteScore
3.20
自引率
12.50%
发文量
44
审稿时长
14 weeks
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