Direction-adjustable catheter system based on choledochoscope

The utility model provides a choledochoscope-based direction-adjustable catheter system, which comprises an outer tube, an inner tube and an outer tube, and is characterized in that the outer tube comprises a first tube section and a second tube section; the second pipe section is connected with the first pipe section; the third pipe section is integrally connected with the second pipe section; the wall thickness of the first pipe section is larger than that of the second pipe section. In view of the wall thickness difference between the first tube section and the second tube section, and the second tube section is made of a material such as a silica gel material, when a choledochoscope enters the second tube section, the second tube section can be bent by a certain amplitude relative to the third tube section under the action of the choledochoscope, so that the field of view can be changed along with the movement of the choledochoscope, and the observation effect of the choledochoscope is improved. When soli