The patient is 73 years old and has emphysema. To see how long he will survive, we must first assess the severity of the emphysema and how well the lung function is at this moment. If the emphysema is fairly mild and the lung function is okay, the survival rate is relatively high despite being 73 years old, with no problem for 10-15 years. If you are 73 years old and your emphysema is serious and your lung function is quite poor, even if you take medication and quit smoking in time, your survival rate will not be too high because you are older, your inhalation medication fit rate is quite poor, and the effectiveness of the medication used is also quite poor, your survival rate will be about 5 years, your lung function will decline significantly, and your survival rate will be significantly lower. Therefore, at the age of 73 with emphysema, it is still necessary to carry out standardized treatment.