(1), ensure adequate rest and sleep a few days before operation, quit smoking and drinking two weeks before operation, and stop taking drugs containing aspirin and vitamin E. ..

(2), the subjects should inform the doctor in detail whether there is a serious illness; Have a history of drug allergy; Have a clear history of communication; Whether there is a tendency of scar hyperplasia.

(3) Eating and drinking are prohibited 12 hours before operation, and drinking is prohibited for 4 hours. Need to test blood items, blood sugar, electrocardiogram.

(4) It is not suitable for surgery during menstrual period, pregnancy and lactation for 6 months.