| 主权项 |
1. A fistula catheter to be disposed in a fistula of a patient, comprising:
an extracorporeal fixing part configured to be disposed on an abdominal wall surface-side of the fistula; a supply tube comprising a tubular element joined to the extracorporeal fixing part, and having a tip-end section, a main lumen, and a sub-lumen in a peripheral wall thereof; and an intracorporeal fixing part at an outer periphery of the supply tube and proximate the tip-end section, the intracorporeal fixing part comprising an inner balloon and an outer balloon outside of the inner balloon, a first one-way valve disposed between the sub-lumen and the inner balloon, and a second one-way valve disposed between the sub-lumen and the outer balloon, the inner balloon in communication with the sub-lumen through the first one-way valve, and the outer balloon in communication with the sub-lumen through the second one-way valve. |
