| abstract |
(57) [Summary] [Problem] While ensuring flexibility and followability, particularly at the tip, To provide a catheter excellent in kink resistance and pressure resistance. A catheter (1) according to the present invention includes a catheter body (2) made of a flexible tubular member and a coil (3) having a reinforcing effect. And the catheter 1 The coil 3 includes the first region 4 located on the most distal side and the second region 5 on the proximal side, and the coil 3 extends from the first region 4 to the second region 5. In the second region 5, the coil 3 is wound at a relatively large winding pitch over the entire length. In the first region 4, the coil 3 is wound at a relatively small winding pitch in which adjacent windings are separated from each other over the entire length, and the winding pitch gradually decreases toward the distal end. Thereby, the rigidity of the catheter 1 in the first region 4 is smaller than that in the second region 5. |