肺水肿可分心源性和非心源性二类。前者由心脏疾病——主要为左心衰竭和二尖瓣狭窄所引起;后者则由其他因素所致。不同病因的肺水肿,其治疗措施与预后不尽相同。故病因探讨具有重大的意义。非心源性肺水肿的病因,按其性质可分五类,每 Pulmonary edema can be distracted source and non-cardiogenic two categories. The former is caused by heart diseases - mainly left ventricular failure and mitral stenosis; the latter by other factors. Different etiology of pulmonary edema, its treatment and prognosis are not the same. Therefore, the cause of the discussion of great significance. The causes of non-cardiogenic pulmonary edema, according to their nature can be divided into five categories, each