Fig. 1

(A) After a Freeport (Ningbo SensCure Biotechnology) was inserted. One 8-mm optic trocar and two 8-mm trocars for robotic instruments were placed at 12o’clock, 3o’clock, and 9o’clock direction, respectively, and two assistant trocars were placed at the same time. (B) da Vinci XI robot was docked