根据发病速度分类 1、急性(数分钟内发病):肺栓塞、肺水肿、气胸。 2、急性(数小时内发病):哮喘、左心衰竭、肺炎、急性肺浸润。 3、亚急性(数天内发病):亚急性肺浸润、如类肉廇病、胸膜渗出液,支气管癌。 4、慢性(数月或数年内发病):慢性呼吸道阻塞、肺部广泛纤维化、贫血、甲状腺中毒。 According to the incidence rate classification 1, acute (onset in minutes): pulmonary embolism, pulmonary edema, pneumothorax. 2, acute (onset within hours): asthma, left heart failure, pneumonia, acute lung infiltration. 3, subacute (onset within a few days): subacute pulmonary infiltrates, such as flesh disease, pleural effusion, bronchial cancer. 4, chronic (onset of several months or years): chronic obstruction of the airways, extensive pulmonary fibrosis, anemia, thyroid poisoning.