If there are no cardiovascular diseases such as hypertension, coronary heart disease and arrhythmia, there will be no cerebrovascular diseases. Simple bronchitis depends on the results of lung function and blood gas analysis to judge the risk of operation. To tell the truth, if you have serious tracheal diseases at the age of 70, the risk of anesthesia operation will be greatly increased, and there is no risk factor. If all goes well, the operation will be 100% safe, and if there is an accident, it will be 100% risk for our people. It can only be said that if the above two results are normal, the risk will be smaller, and there will be risks as long as surgery is performed. Also, nasal polyps in our hospital can be operated under local anesthesia+auxiliary analgesic drugs, and the risk will be less. Note: Don't do or quit smoking for more than two weeks when you have upper respiratory tract infection.