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使用九轴惯性测量单元对膝内翻推力进行移动评估的诊断准确性。

Diagnostic Accuracy of the Mobile Assessment of Varus Thrust Using Nine-axis Inertial Measurement Units.

作者信息

Tsukamoto Hiroaki, Saito Kimio, Matsunaga Toshiki, Iwami Takehiro, Saito Hidetomo, Kijima Hiroaki, Akagawa Manabu, Komatsu Akira, Miyakoshi Naohisa, Shimada Yoichi

机构信息

Department of Orthopedic Surgery, Akita University Graduate School of Medicine, Akita, Japan.

Akita Sports Arthroscopy Knee Group (ASAKG), Akita, Japan.

出版信息

Prog Rehabil Med. 2021 Feb 6;6:20210009. doi: 10.2490/prm.20210009. eCollection 2021.

DOI:10.2490/prm.20210009
PMID:33564730
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7862008/
Abstract

OBJECTIVES

The purpose of this study was to clarify the diagnostic accuracy of the mobile assessment of varus thrust using inertial measurement units (IMUs).

METHODS

A total of 80 knees in 49 patients were enrolled in this study. On visual analysis of gait to determine the presence or absence of varus thrust, 23 knees were assigned to the Present group, 17 to the Ambiguous group, and 40 to the Absent group. The peak knee varus angular velocities (PVVs), measured by quantitative gait analysis using nine-axis IMUs, were compared between these three groups. A receiver operating characteristic curve for the relationship between the visual assessment of varus thrust (Present and Ambiguous) and the measured PVV was created, and the cut-off PVV for visualized varus thrust was determined as the highest point for both sensitivity and specificity.

RESULTS

The mean PVVs were significantly different between the three groups (Present, 47.7 ± 8.2 degree/s, Ambiguous, 34.1 ± 10.5 degree/s, and Absent, 28.1 ± 8.3 degree/s, respectively, ANOVA P=0.000). The PVV cut-off value for visualized varus thrust was 28.1 degree/s, yielding a sensitivity of 0.957 and a specificity of 0.579.

CONCLUSIONS

A PVV <28.1 degree/s is useful for ruling out varus thrust during gait. This quantitative varus thrust assessment method using IMUs has clinical utility as a screening test.

摘要

目的

本研究旨在阐明使用惯性测量单元（IMU）进行内翻推力移动评估的诊断准确性。

方法

本研究共纳入49例患者的80个膝关节。通过步态视觉分析确定是否存在内翻推力，将23个膝关节分配到存在组，17个膝关节分配到不确定组，40个膝关节分配到不存在组。使用九轴IMU通过定量步态分析测量的膝关节内翻峰值角速度（PVV）在这三组之间进行比较。绘制内翻推力视觉评估（存在和不确定）与测量的PVV之间关系的受试者工作特征曲线，并将可视化内翻推力的PVV截断值确定为敏感性和特异性最高的点。

结果

三组之间的平均PVV有显著差异（存在组为47.7±8.2度/秒，不确定组为34.1±10.5度/秒，不存在组为28.1±8.3度/秒，方差分析P = 0.000）。可视化内翻推力的PVV截断值为28.1度/秒，敏感性为0.957，特异性为0.579。

结论

PVV<28.1度/秒有助于排除步态中的内翻推力。这种使用IMU的定量内翻推力评估方法作为一种筛查测试具有临床实用性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d9f7/7862008/942450f2fed5/prm-6-20210009-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d9f7/7862008/99092fd6f256/prm-6-20210009-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d9f7/7862008/ede574b9091c/prm-6-20210009-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d9f7/7862008/a4ce4e660e15/prm-6-20210009-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d9f7/7862008/942450f2fed5/prm-6-20210009-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d9f7/7862008/99092fd6f256/prm-6-20210009-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d9f7/7862008/ede574b9091c/prm-6-20210009-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d9f7/7862008/a4ce4e660e15/prm-6-20210009-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d9f7/7862008/942450f2fed5/prm-6-20210009-g004.jpg

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