目前关于肺纤维化、肺气肿及成年人呼吸窘迫症(ARDS)等肺疾患的发病机理,在肺泡损伤与修复方面已有广泛研究。由于各种有害物质在对肺泡的作用途径、损伤程度及时间上有所差别,因此其病理改变也各不相同。例如在ARDS,因为肺泡血管内皮细胞首先受到损 At present, the pathogenesis of lung diseases such as pulmonary fibrosis, emphysema and adult respiratory distress syndrome (ARDS) has been extensively studied in alveolar damage and repair. As a variety of harmful substances in the role of alveolar pathway, degree of injury and time are different, so the pathological changes are also different. For example, in ARDS, alveolar vascular endothelial cells are first damaged