Fig. 1

The patient's position and location of trocar. The patient was placed in an oblique position of 70°. The location of trocar: A hole is located under the costal margin of the mid-clavicular line on the affected side, and 5 mm cannula is punctured into the abdominal cavity; B hole is located around the umbilicus and makes a longitudinal incision about 1 cm, and 10 mm Trocar cannula is placed into the laparoscope; C, D and E holes are located at the midpoint of the anterior superior iliac crest and umbilicus line on the affected 12 mm, 12 mm and 5 mm Trocar cannulas were placed at the horizontal intersection of axillary front line and umbilical cord for the placement of operating instruments