Results The drainage effect of LCTMSH group was equal to that of the contrast group,it did not increase the pain of patients,and did not make the pneumatothorax and thorax infection.

结果单根多侧孔长胸管引流效果完全同对照组,并无增加患者之痛苦,无拔管时造成气胸,无并发胸腔感染。