大家传统认为 ,人类的肺脏分左、右两肺 ,共分 5叶 18个段级支气管。专业文献上只提到有少部分段级支气管口可有变异情况。我们开展纤维支气管镜(纤支镜 )检查 10余年 ,发现肺段口支气管变异情况十分多见 ,未引起注意。本文对近四年来行纤支镜检查的 5 86例患者做了仔细观察 ,? We generally believe that the human lung points left and right lungs, is divided into 5 leaf 18 segments of the bronchus. Only a small part of the professional literature mentioned the bronchial segment may have variation. We carry out fiber bronchoscopy (bronchoscopy) examination of more than 10 years and found that bronchiectasis of the pulmonary section of the mouth is very common, did not pay attention. In this paper, we performed careful observation on 5 86 patients undergoing bronchoscopy in the past four years.