| 摘要 |
PROBLEM TO BE SOLVED: To provide a balloon catheter which achieves a higher freedom in the selection of forming materials for outer and inner tubes in a type with a double tube comprising the outer and inner tubes by making a gap between the internal surface of the outer tube and the external surface of the inner tube hard to deform partially during the use thereof and moreover, the bending rigidity thereof properly adjustable. SOLUTION: An inner tube side engaging member 15 is arranged on the external surface of an inner tube 3 and an outer tube side engaging member 17 on the internal surface of an outer tube 5. The inner tube side engaging member 15 and the outer tube side engaging member 17 form engaging parts 19 to be mutually mated. The engaging parts 19 enable the inner tube 3 to slide axially with respect to the outer tube 5 while disabling the displacement of the inner tube 3 to the outer tube 5 in the circumferential and radial directions thereof 5. |
