Inada Toru, Tsutsumi Masahiro, Ikezu Masahiro, Iizuka Yasuhiko, Nagano Tatsuo, Kudo Shintarou
Graduate School of Health Sciences, Morinomiya University of Medical Sciences, Osaka Japan.
Nagano Orthopedics Clinic, Nara, Japan.
JSES Int. 2024 Jun 19;8(5):1033-1038. doi: 10.1016/j.jseint.2024.06.004. eCollection 2024 Sep.
The thickening of the inferior glenohumeral joint capsule (IGC) is a characteristic finding in frozen shoulders. However, the relationship between the thickness of the IGC measured using ultrasonography (US) and the range of motion (ROM) remains unclear. This study aimed to investigate a suitable IGC thickness measurement site that can reflect the ROM of frozen shoulders.
The participants were 29 patients with frozen shoulder and 20 healthy shoulders of 10 healthy adult. US measurements of the IGC were performed at 80° elevation in the scapular plane, with thickness was measured at 3 levels in both groups: just above the surgical neck, just above the anatomical neck, and at the parenchymal level. The relationship between thickness and ROM at the 3 levels was also assessed. The thickness of the IGC was evaluated using magnetic resonance imaging and US, as well as the validity of US evaluation.
There was a positive correlation (r = 0.72) between magnetic resonance imaging-measured and US-measured IGC thickness. The IGC was thicker in the frozen shoulder group than in the control group at all 3 levels ( < .001). The thickness of the IGC at the parenchymal level showed a significant negative correlation with all ROMs: flexion (r = -0.63), abduction (r = -0.60), external rotation (r = -0.50), and internal rotation (r = -0.52).
The thickness of the IGC at the parenchymal level is negatively correlated with the ROM. The evaluation of the IGC in this study will be helpful in selecting treatment options for frozen shoulders.
肩胛下关节囊（IGC）增厚是肩周炎的一个特征性表现。然而，超声（US）测量的IGC厚度与活动范围（ROM）之间的关系仍不清楚。本研究旨在探究一个能够反映肩周炎ROM的合适的IGC厚度测量部位。
研究对象为29例肩周炎患者和10名健康成年人的20个健康肩部。在肩胛平面80°抬高时进行IGC的超声测量，两组均在3个水平测量厚度：手术颈上方、解剖颈上方和实质水平。还评估了3个水平下厚度与ROM之间的关系。使用磁共振成像和超声评估IGC的厚度，以及超声评估的有效性。
磁共振成像测量的IGC厚度与超声测量的IGC厚度呈正相关（r = 0.72）。在所有3个水平上，肩周炎组的IGC均比对照组厚（<0.001）。实质水平的IGC厚度与所有ROM均呈显著负相关：前屈（r = -0.63）、外展（r = -0.60）、外旋（r = -0.50）和内旋（r = -0.52）。
实质水平的IGC厚度与ROM呈负相关。本研究中对IGC的评估将有助于为肩周炎选择治疗方案。
