英语语法分析

Methods 3 patients with recalcitrant bronchopleural fistula underwent transsternal transpericardial closure of a bronchopleural fistula and drainage by open thoracostomy.

方法3例难治性支气管胸膜瘘的病人，采用胸骨正中切口经心包纵隔内关闭支气管残端加胸壁开窗引流治疗。