Repeated upper respiratory tract infection needs to observe whether the lung function is damaged;

Smoking history and long-term cough history need to observe whether the function of the small airways has changed;

Seasonal cough and asthma needs to see if you have asthma;

Regular review of chronic bronchitis is helpful to monitor the progress of the disease;

Abnormal chest X-ray needs to judge the degree of lung function damage.

Anesthesia, risk assessment of surgical procedures, and monitoring of postoperative recovery.