Increased Stiffness of Rotator Cuff Tendons in Frozen Shoulder on Shear Wave Elastography

Journal of Ultrasound in Medicine - Tập 39 Số 1 - Trang 89-97 - 2020
Tomoki Wada1, Yoshiaki Itoigawa1, Koichiro Yoshida1, Takayuki Kawasaki2, Yuichiro Maruyama1, Kazuo Kaneko2
1Department of Orthopedic Surgery, Juntendo University Urayasu Hospital, Chiba, Japan
2Department of Orthopedic Surgery, Juntendo University, Tokyo, Japan

Tóm tắt

ObjectivesTo evaluate the stiffness and morphologic characteristics of the capsule, rotator cuff tendons and muscles, coracohumeral ligament (CHL), and long head of the biceps in patients with frozen shoulder using shear wave elastography (SWE) with B‐mode ultrasound.MethodsThirty‐two patients with frozen shoulder were divided into freezing and frozen phases. All patients had limitations of their range of motion without rotator cuff tears. Stiffness was measured by SWE in the supraspinatus (SSp) tendon, infraspinatus (ISp) tendon, SSp muscle, ISp muscle, teres minor muscle, upper and lower trapezius muscles, posterior capsule, CHL, and long head of the biceps. The posterior capsule and CHL thicknesses were also investigated with B‐mode ultrasound. All values were compared in the affected and unaffected shoulders in each phase.ResultsThe SWE values for the SSp and ISp tendons in the freezing phase and the CHL in the frozen phase were significantly greater on the affected side than the unaffected side (mean ± SD, 280.4 ± 125.3 versus 178.1 ± 73.3, 318.4 ± 110.7 versus 240.8 ± 91.5, and 287.2 ± 135.3 versus 214.1 ± 91.1 kPa, respectively; P < .05). The posterior capsule in both the freezing and frozen phases and the CHL in the frozen phase were significantly thicker on the affected side than the unaffected side (1.3 ± 0.2 versus 0.9 ± 0.3, 1.2 ± 0.4 versus 0.9 ± 0.3, and 4.4 ± 1.4 versus 3.3 ± 1.1 mm; P < .01).ConclusionsThe SWE values of the both SSp and ISp tendons increased in the freezing phase, and that of the CHL also increased in the frozen phase. Not only the change in thickness of the capsule but also the change in stiffness of the rotator cuff may correlate with frozen shoulder.

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Thông tin xuất bản

Journal of Ultrasound in Medicine

Tập 39 Số 1

89-97

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