How long you can live with an artificial lung depends largely on how well the patient’s own lungs recover. An artificial lung is an artificial gas exchange machine that temporarily replaces the function of the lung for gas exchange to meet the patient’s oxygen needs when the patient has a severe lung infection or pulmonary edema that affects gas exchange. After the patient’s lung function is restored, the patient can reuse his or her own lungs for gas exchange. If the patient has advanced lung cancer and there is the possibility of distant metastasis of cancer cells, even after replacing the artificial lung, the patient’s survival period will not be too long, which may be six months to a year or even shorter, and the use of artificial lung is generally not recommended. In the case of respiratory failure caused by common infections, artificial lungs can help patients through the critical phase of the disease and life expectancy is generally unaffected. The purpose of using artificial lung is mainly to maintain stable vital signs and also to actively treat the primary lesion in order to save the patient’s life.