Catheter and method of manufacturing same
First Claim
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1. A method for manufacturing a catheter having two or more portions of different stiffness, the method comprising:
- forming a catheter shaft portion of a first material and a catheter tip of the first material, the catheter tip being part of the catheter shaft portion; and
forming a joint portion that has a different stiffness than the catheter shaft portion, the forming of the joint portion comprises;
applying a member of a second material to the catheter shaft portion, proximally to the catheter tip, the second material being more flexible than the first material of the catheter shaft portion; and
reducing thickness of the first material that forms the catheter shaft portion along the member of the second material and integrating the second material into the first material of the catheter shaft portion by treating the second material with a radiation energy.
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Abstract
A catheter basically has a catheter shaft in which a catheter tip of which is provided with a joint made of a material which is more flexible than the material of the catheter shaft. The joint is disposed between the distal end of the catheter shaft and the distal end of the catheter tip. The front end consists of a material being the same or more rigid than that of the catheter shaft.
198 Citations
16 Claims
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1. A method for manufacturing a catheter having two or more portions of different stiffness, the method comprising:
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forming a catheter shaft portion of a first material and a catheter tip of the first material, the catheter tip being part of the catheter shaft portion; and forming a joint portion that has a different stiffness than the catheter shaft portion, the forming of the joint portion comprises; applying a member of a second material to the catheter shaft portion, proximally to the catheter tip, the second material being more flexible than the first material of the catheter shaft portion; and reducing thickness of the first material that forms the catheter shaft portion along the member of the second material and integrating the second material into the first material of the catheter shaft portion by treating the second material with a radiation energy. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for manufacturing a catheter having two or more portions of different stiffness, the method comprising:
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forming a catheter shaft portion of a first material and a catheter tip of the first material, the catheter tip being part of the catheter shaft portion; forming a joint portion that has a different stiffness than the catheter shaft portion, the forming of the joint portion comprises; applying an encircling member of a second material to the catheter shaft portion, the second material being more flexible than the first material of the catheter shaft portion; reducing thickness of the first material that forms the catheter shaft portion along the encircling member and integrating the second material into the first material of the catheter shaft portion by treating the encircling member of the second material with a radiation energy. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification