Fig. 3.

Positional relationship between bypass vessel routes and the pancreas. Different vascular bridging routs. R1 is the retrogastric tunnel route in the ventral side of the pancreas. R2 is the pullout route on the dorsal side of the pancreas, and the bridging vessels completely passed through the dorsal side of the pancreas. R3 is the low dissection route, in which the bridging vessels did not need to pass through the dorsal side of the pancreas. R, route