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Dynamic Ultrasonographic Measurement of Inferior Joint Capsule Thickness in Patients with Unilateral Frozen Shoulder

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Author(s)
Jun-Gyu LeeHyungsun PeoJang-Hyuk ChoChul-Hyun ChoDon-Kyu KimDu-Hwan Kim
Keimyung Author(s)
Cho, Jang HyukCho, Chul Hyun
Department
Dept. of Rehabilitation Medicine (재활의학)
Dept. of Orthopedic Surgery (정형외과학)
Journal Title
Diagnostics (Basel)
Issued Date
2021
Volume
11
Issue
5
Keyword
frozen shoulderultrasoundinferior joint capsule
Abstract
The diagnostic value of ultrasonography (US) for frozen shoulder (FS) is not well established. This study aimed to assess the diagnostic value of US measurement of inferior joint capsule (IJC) thickness and evaluate changes in the thickness of the IJC by US depending on arm position. A total of 71 patients with clinically diagnosed unilateral FS who underwent bilateral US measurement of the IJC were enrolled in this study. The US measurement of the IJC was performed with a linear transducer positioned around the anterior axillary line with the shoulder 40° abducted and with neutral rotation of the glenohumeral joint (neutral position). We also measured the IJC thickness in the externally rotated and internally rotated positions with the shoulder 40° abducted. In the neutral position, as well as in the internally rotated and externally rotated positions, the thickness of the IJC on US was significantly higher in the affected shoulder than that in the unaffected shoulder (all p < 0.001). On both the affected and unaffected sides, the US thickness of the IJC in the neutral position was significantly higher than that in the externally rotated position (p < 0.001), but lower than that in the internally rotated position (p < 0.001). Regarding IJC thickness in the neutral position, a 3.2-mm cutoff value yielded the highest diagnostic accuracy for FS, with a sensitivity and specificity of 73.2% and 77.5%, respectively. The area under the curve for IJC thickness was 0.824 (95% confidence interval, 0.76–0.89). US measurement of the IJC in the neutral position yielded good diagnostic accuracy for FS. Because IJC thickness is affected by arm rotation, it is important to measure the IJC thickness in a standardized posture to ensure diagnostic value.
Keimyung Author(s)(Kor)
조장혁
조철현
Publisher
School of Medicine (의과대학)
Citation
Jun-Gyu Lee et al. (2021). Dynamic Ultrasonographic Measurement of Inferior Joint Capsule Thickness in Patients with Unilateral Frozen Shoulder. Diagnostics (Basel), 11(5), 898. doi: 10.3390/diagnostics11050898
Type
Article
ISSN
2075-4418
Source
https://www.mdpi.com/2075-4418/11/5/898
DOI
10.3390/diagnostics11050898
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/43788
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학)
1. School of Medicine (의과대학) > Dept. of Rehabilitation Medicine (재활의학)
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