1. Do not take drugs containing aspirin within two weeks before operation, so as to avoid the decline of platelet coagulation function caused by aspirin.

2. Patients with hypertension and diabetes should inform the doctor of their condition at the time of initial diagnosis, so that the doctor can confirm the operation plan;

3. Make sure that you are in good health before the operation, and there is no infectious disease or other body inflammation;

4. Don't make up before the operation;

5. Women should avoid menstrual period;

6. Men should quit smoking one week in advance.