Lone-Star retractor perineal exposure method for laparoscopic abdominal perineal resection of rectal cancer

Figure 1 Layout of the trocars. 1: A 12 mm trocar is placed two transverse finger widths from the right anterior superior iliac spine as the main operation port for the surgeon; 2: A 5 mm trocar is placed at the right midclavicular line at the flat umbilicus as the auxiliary operation port for the surgeon; 3: A 5 mm trocar is placed at the left midclavicular line at the flat umbilicus as the main operation port for the first assistant; 4: A 5 mm trocar is placed at the left Mai’s point as an auxiliary operation port for the first assistant; 5: A 10 mm diameter trocar is placed 1 cm above the umbilicus as an observation port.