野球 • ソフトボール選手に発生した外傷性肩関節前方不安定症の特徴
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概要
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The purpose was to investigate the clinical features of traumatic anterior shoulder instability in baseball and softball players. Patients who suffered traumatic anterior shoulder instability totalled 170, and there were 72 contact sports players, 41 overhead sports players, and 57 others. Among them, 100 shoulders underwent operation. The most popular sport was baseball 21 cases. Their mean age, including 2 softball players, was 19.7 years old, and there were 4 pitchers, 2 catchers, 17 field players. The throwing side was affected in 12 cases, and the non-throwing side was affected in 11 cases, and there was first time instability in 9 cases and recurrent instability in 14 cases. They were injured by head sliding in 7 cases, by diving catching in 4 cases, and at back to base in 4 cases. Among them, 12 innitially suffered subluxation, which were injured by hyperflexion of the shoulder. Regarding their disability in 14 players with recurrent instability, while 3 of 6 throwing shoulders complained of throwing pain and the other 3 shoulders complained of dislocation at throwing, 5 of 8 non-throwing shoulders complained of apprehensive sensation and/or pain at back to base or at catching. Among ten players who underwent operation, all of them suffered recurrent instability, and all of 8 players suffering on the non-throwing side underwent operation. Among nine operated players who were followed up for 1 year minimally, 8 players could completely return to pre-injured level, one throwing shoulder could not. In conclusion, it is important to take care of the subluxation of the non-throwing shoulder at base running and fielding in baseball players.
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