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KMID : 1140920180420020260
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Annals of Rehabilitation Medicine
2018 Volume.42 No. 2 p.260 ~ p.269
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Quantitative Measurement of Muscle Atrophyand Fat Infiltration of the Supraspinatus MuscleUsing Ultrasonography After ArthroscopicRotator Cuff Repair
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Kim Yong-Ki
Choi Eun-Seok
Kim Keon-Tae
Yoon Jung-Ro
Chae Sang-Han
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Abstract
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Objective: To investigate the utility of ultrasonography to objectively examine morphological changes (i.e., muscleatrophy and fatty infiltration) of the supraspinatus muscle.
Methods: Thirty-four patients were prospectively enrolled in this study. The degrees of muscle atrophy andfat infiltration were measured using ultrasonography 3?4 months after arthroscopic supraspinatus tendonrepair. Shoulder function (i.e., shoulder active range of motion, visual analogue scale, and constant score) wasexamined. Using the symmetricity of the muscles in the human body, the degrees of morphological changes of thesupraspinatus muscle were quantitatively measured. The associations between the morphological changes of thesupraspinatus muscle and shoulder function were identified.
Results: There were statistically significant differences in the cross-sectional area (CSA) and echogenicity betweenthe surgery and non-surgery sides (p<0.001). The CSA ratio, which represents the degree of muscle atrophy, wasassociated with shoulder forward flexion, external rotation, and constant score; however, the echogenicity ratio,which represents the degree of fat infiltration, was not associated with shoulder function after surgery.
Conclusion: This study demonstrated that shoulder function could be predicted by evaluating the morphologicalchanges of the supraspinatus muscle using ultrasonography and that objective evaluation is possible throughquantitative measurement using the symmetricity of the human body.
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KEYWORD
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Rotator cuff injuries, Ultrasonography, Supraspinatus, Atrophy, Muscles
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