The side effects of lung lavage (high volume whole lung lavage) are minor and may include fever, hemoptysis, mild pulmonary edema, and pulmonary atelectasis. 1. Fever and hemoptysis: mainly due to improper operation during the operation or infection after the operation, which may cause the patient to have fever and hemoptysis. 2. Mild pulmonary edema: During the whole process of lung lavage, the residual lavage fluid may lead to transient mild pulmonary edema in the lungs, but in general, it will not affect the patient’s lung function, and there will be no symptom of respiratory distress. 3. Lung atelectasis: Some alveolar surface-active substances may be lost during lung lavage, and alveolar surface-active substances are substances that maintain alveolar tone, if the patient’s ability to synthesize lung surface-active substances decreases, it will lead to atelectasis. Lung lavage (high-volume whole-lung lavage) has fewer side effects, but if an abnormality occurs, medical attention should be sought.