(1) Routine examination of blood, urine, liver and kidney function, coagulation function, etc. was conducted under the guidance of a doctor.

(2) Check the anterior position, oblique position and posterior position of the head and face before operation.

(3) There is generally no need to shave the hair around the operation area before operation. Men routinely cut their hair before surgery, and women wash their hair before surgery.

(4) Surgery is generally performed under local anesthesia, and children who do not cooperate should be performed under general anesthesia or basic anesthesia plus local anesthesia. Therefore, we should make corresponding preparations before anesthesia.