| 主权项 |
1. A fistula catheter to be disposed in a fistula of a patient, comprising:
an external fixing part configured to be disposed on an abdominal wall of the fistula, a supply tube with a tubular body configured with a tip end side connected to the external fixed part and with a primary cavity formed therein and a secondary cavity formed in a peripheral wall thereof, and an inner fixed part on the tip end side on an outer periphery of the supply tube that expands with a supply of a compound liquid of a granular substance and a liquid through the secondary cavity, the internal fixed part comprises an inner balloon that communicates with the secondary cavity through filler ports provided on the peripheral surface of the supply tube, and an outer balloon provided on the outer peripheral side of the inner balloon, respectively, and is configured so that an empty space is formed between the inner balloon and the outer balloon at the time of expansion, and a filter on the filler port that communicates with the secondary cavity and the outer balloon that the liquid within the compound liquid can pass through but the granular substance cannot and can fill the inner balloon with the compound liquid through the filler port that communicates with the inner balloon from the secondary cavity and which can fill the outer balloon with the liquid from within the compound liquid through the filter and the filler port that communicates with the outer balloon from the secondary cavity. |
