The standard stipulates that:

3. 1.3.65438+

3. 1.3.2 T-shaped arc incision method: make an arc transverse incision from the left shoulder peak through the sternum to the right shoulder peak, and make a straight longitudinal incision downward at its midpoint, around the left side of umbilicus to the upper edge of pubic symphysis.

3. 1.3.3 Y-shaped incision method: cut down from the left and right mastoid processes to the shoulder respectively, and then cut forward until the sternal notch meets. The thoracoabdominal incision is the same as above, and the submandibular and chest skin are peeled off. Folding flap covers the face and exposes the anterior organs of cervical spine.

All three are possible, mainly because the straight line cutting method will cut through the front of the neck. If it is hung, there will be a constriction on the neck, and the constriction will be cut off by straight cutting. In order to ensure the integrity of the damage, T type or Y type will be adopted.

In practical work, it is necessary to analyze the specific situation, and there is no strict regulation of "only use".