纵隔气肿即纵隔组织内积气,新生儿和婴幼儿发病率较高,多在肺部疾病的基础上突然发病。其发病原因如下: 小儿末稍气道较细,气道粘液腺多,当呼吸道感染时可引起气管痉挛,且分泌物多而粘稠致气道压力增高,肺泡过 Mediastinal emphysema, ie, mediastinal gas accumulation, neonatal and infant higher incidence, mostly in the sudden onset of lung disease. The pathogenesis is as follows: children at the end of the finer airway, airway mucus gland more, when the respiratory tract infection can cause tracheal spasm, and secretions and more viscous induced airway pressure, alveolar