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KMID : 0950120120110020075
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Jouranl of Korean Orthopaedic Sports Medicine
2012 Volume.11 No. 2 p.75 ~ p.81
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Ultrasonographic Findings of the Shoulder in Asymptomatic High School Baseball Players
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Hwang Tae-Hyok
Cho Hyung-Lae
Wang Tae-Hyun
Yang Hee-Soon
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Abstract
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Purpose: To evaluate the ultrasonographic (US) findings in both shoulders of asymptomatic high school baseball players and compare with healthy control.
Materials and Methods: 42 individuals (age: 17.6±1.2 years) participated in this study. We recruited two groups of high school male baseball players, 14 pitchers and 18 fielders without shoulder pain for recent 6 months as well as one control group of 10 untrained healthy high school students who were age-matched. Ultrasound measurements of thickness of the biceps and supraspinatus tendon and acromio-humral distance (AHD) at 0˚abduction were taken in dominant and nondominant shoulders.
Results: On US examination, subacromial bursa effusion was observed in 7 of the dominant shoulders and in 2 of the nondominant shoulder of 32 baseball players and in none of the asymptomatic controls. The thickness of the biceps and supraspinatus tendons and AHD in both shoulders were significantly greater in the baseball players than in the controls (p<0.05). We also found that the biceps and supraspinatus tendon thickness and AHD of the dominant shoulder were significantly greater than the non-dominant shoulder in baseball players (p<0.05), but there were no differences between pitchers and fielders and between healthy controls.
Conclusion: Subacromial effusion could be found even in the asymptomatic stage and the thickness of the biceps and supraspinatus tendons and AHD were significantly greater in the baseball players than in the healthy controls. Our data is useful reference guide for the ultrasonographic diagnosis of shoulder pathologies occurring in high school baseball players.
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KEYWORD
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Shoulder , Ultrasonography , High school baseball players
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