Internal duodenum drainage tube for sagittal polyurethane common bile duct

The utility model discloses an internal duodenum drainage tube for a sagittal polyurethane common bile duct, which comprises a tube body, wherein the tube body comprises a near-end tube section and a far-end tube section; the length of the near-end tube section is 50mm, and the internal diameter of the near-end tube section is 6mm; the length of the far-end tube section is 290mm, and the internal diameter of the far-end tube section is 4mm; the far-end tube section and the near-end tube section are communicated by a transition tube section with a gradual change diameter; the length of the transition tube section with the gradual diameter is 10mm; a tube wall on the starting end of the near-end tube section is at least provided with a first radial through hole; a tube wall on the tail end of the far-end tube section is at least provided with a second radial through hole; the diameter of the first radial through hole is 3mm; and the diameter of the second radial through hole is 2mm. The drainage tube disclosed