청소년기 야구선수의 주관절 내상과의 방사선학적 변화

Radiographic Changes of the Medial Epicondyle in Little League Baseball Player

목적 : 본연구는초등학교 및중학교야구선수의우세팔주관절의변화를, 비우세팔과비교하여봄으로써투구가주관절의기능에미치는영향을확인하고자하였다. 대상및방법 : 5개초등학교및2개중학교야구선수105명을대상으로우세팔과비우세팔의주관절내상과의동통및이완성과방사선학적변화의양상을비교하였다. 나이는평균12세였으며, 운동경력은평균32개월이었다. 우세팔과비우세팔의외반정도, 내상과및주두의골극의크기, 골편의존재여부및성장판간격등을측정하였으며이학적검사결과와비교하였다. 결과 : 37명(35$\%$)의선수가 경기중통증을느꼈으며, 시각표를 이용한동통측정 시평균 4.8로 측정되었다. 우세팔과비우세팔에서굴곡을제외한운동범위, 외반정도및근력은차이가없었으며, 안정도는우세팔에서외반이완정도가컷다. 이학적 검사상 우세팔에서 척골상완관절 및요골상완골소두관절의 압통을호소한경우가각각18례 및 6례, 굴곡근군기시부의압통을 호소한경우는17례이었다. 신전근군및내측측부인대부의압통을호소한경우는 우세팔에서11례 및 39례 이었고 비우세팔에서 10례 및 12례이었다. 단순방사선촬영으로측정한내상과의크기는각각13.0$\times$6.3 mm 및 11.7$\times$6.1 mm으로우세 팔에서커졌으며, 성장판의간격또한각각 0.8 mm, 0.5 mm로우세팔에서넓어진양상이었다. 우세팔 14례( 13$\%$)에서 내상과의 하부에 골편의 소견을 보였으며, 하부골편을 포함하여 내상과 하부의 불규칙한 골 변화를 보인 경우는25례(24$\%$) 이었다. 결론 : 청소년기야구선수의경우주관절내상과의과다한스트레스로인한손상을피하기위해적절한무게의공과배트를사용하며, 운동량을조절할필요가있을것으로사료된다.

Purpose : We evaluated radiographic changes and clinical manifestations of the elbow joint to identify the effects of the throwing between dominant and non-dominant arms. Materials and Methods : A hundred and five little leaguer’s baseball player in 5 elementary school and 2 middle school were evaluated for clinical symptoms and radiographic changes about elbow joint. Mean age was 12 years old and average periods of exercise were 32 months. Elbow functions were evaluated using ASES standardized assessment form and radiographic changes of medial epicondyle were examinated for enlargement, separation of the apophyses, fragmentation and irregularity. Results : Thirty seven players (35$\%$) were complained pain with throwing and the average score was 4.8 using visual analog scale. There were no significant differences in range of motion except flexion angle, valgus angle, and strength between dominant arm and non-dominant arm. Valgus laxity was more prominent in dominant arm. Ulnohumeral tenderness, radiocapitellar tenderness and medial flexor origin tenderness were in 18, 6, and 17 cases respectively in dominant arm. Medial epicondyle was enlarged in dominant arm with 13.0 by 6.3 mm compared to non-dominant arm with 11.7 by 6.1 mm. Apophyseal separation was 0.8 mm in dominant arm and 0.5 mm in non-dominant arm. Fragmentation and irregularity were 14 (13$\%$) and 25 (24$\%$) cases respectively in dominant arm. Conclusion : In little league baseball player, it needs usage of ball and bat with appropriate weight, and careful conditioning programs through throwing exercise in order to avoid elbow injuries.