| 摘要 |
<p>[Problem to be Solved] An object of the present invention is to provide a catheter that does not reduce the thickness of an inner tube in a welded part and reduces the risk of penetration of a guide wire through the welded part. [Solution] In catheters 10, 10a, and 10b and a balloon catheter 10c, a protective film 40, 40a, or 40b made of a resin having higher heat resistance than a first inner tube 50 is interposed between an outer tube 30 and the first inner tube 50. Even if the first inner tube 50 is made of a soft thermoplastic resin, this configuration does not reduce the thickness of the first inner tube 50 in the welded part 100 and can reduce the risk of penetration of the guide wire, which is inserted into the first inner tube 50 by an operator, through the first welded part 110, 110a, 110b, or 110c to the walls of a blood vessel, a bile duct, a pancreatic duct, and so on from the first inner tube 50 near the outer tube 30.</p> |
