Patent ID: 6706010
Filing Date: 2004-03-16
Classification: A61M

Abstract:
A balloon catheter having:a catheter shaft with a double-tube structure comprising an outer tube and an inner tube through which a guide wire is passed, located at least in proximity of a distal end portion of the catheter, an inflation lumen through which a pressure fluid is passed being provided between said inner tube and said outer tube; and a balloon disposed at the distal end portion of said catheter shaft and capable of being inflated, deflated, and wrapped by said pressure fluid, wherein an end of said balloon on a proximal side is joined in proximity to the distal end portion of said outer tube, while the other end of said balloon on the distal side is joined in proximity to the distal end portion of said inner tube, and a guide tube having an outside diameter smaller than the inside diameter of said outer tube and having an inside diameter larger than the outside diameter of said inner tube is disposed at least at the distal end portion of said outer tube being fixedly attached thereto so as to form a double-tube with said outer tube, and said inner tube is not fixed, but movably extends concentrically through the interior of said guide tube in the axial direction.