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应用激光经纤支镜治疗18例（27例次）气管癌所致大气过阻塞，结果呼吸困难症状缓解，肺功能明显改善。
By laser bronchoscopy, 18 cases (27 cases) of airway obstruction caused by tracheal cancer were treated. As a result, the symptoms of dyspnea were relieved and the pulmonary function was improved.