BALLOON CATHETER AND METHOD FOR MANUFACTURING SAME

摘要

A balloon catheter capable of improving re-wrapping property by preventing loosening of an inner tube after inflation of a balloon, preventing bending by easing discontinuity of rigidity at the bond portion between an outer tube and the balloon, improving advancing performance inside the blood vessel and passing performance of a constricted portion, and improving transmission property of push force by preventing a so-called "accordion phenomenon", comprising a catheter shaft (1) equipped with a double-tube structure comprising an inner tube (5) and an outer tube (4) at at least a position in the proximity of the distal end portion of the catheter and a balloon (3) disposed at the distal end portion of the catheter shaft (1), wherein a guide tube (11) having an outer diameter smaller than an inner diameter of the outer tube (4) and an inner diameter greater than an outer diameter of the inner tube (5) is disposed at at least the distal end portion of the outer tube (4) in such a manner as to constitute the double-tube with the outer tube (4), and the inner tube (5) is not fixed but is allowed to penetrate through inside of the guide tube (11) in the axial direction.