473080.fig.003a
(a)
473080.fig.003b
(b)
Figure 3: (a) Flexible port insertion procedure according to the two-surgeon method, showing the layouts of the surgeons and the forceps. (b) The surgical opening operation to insert the traction wire of the flexible port into the anterior wall of the rectum according to the two surgeon method. The safety of the procedure is ensured by an operation to be performed while monitoring the operative field with an endoscope that was inserted transgastrically.