The location of atelectasis was mostly in the upper lung lobe in children under 3 years old and in right-middle lung lobe and left lingual lobe in the children above 3 years old caused by sputum jammed and infection. 发生部位:小于3岁患儿中因炎症痰堵所致的肺不张主要发生在上叶,而3岁以上主要发生在右中叶及左舌叶。