| abstract |
(57) [Summary] [Structure] The medical tube 1 has a flexible inner layer 21. And the coil layer 3 attached to the outer side of the inner layer 21, and the flexible outer layer 22 attached to the outer side of the coil layer 3. The coil layer 3 includes the first coil 31 and the coil 3 The second coil is provided substantially coaxially with the first coil and is wound in the opposite direction to the coil 31. First and second coil 3 1, 32 are not fixed to each other, and the inner layer 21 It is arranged in close contact with the inner layer 21 and the outer layer 22 without being adhered or embedded therein. Therefore, when the inner layer 21 and the outer layer 22 are curved, the inner layer 21 and the outer layer 22 can be flexibly curved without being restricted by the inner layer 21 and the outer layer 22. Has been done. [Effect] It is possible to provide a catheter having excellent flexibility and pressure resistance, and excellent operability such as kink resistance, torque transmission, pushability, and followability with a guide wire. |