Catheter having transitioning shaft segments
First Claim
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1. A balloon catheter having a distal tip member, comprising:
- a) an elongated shaft having a proximal end, a distal end, an inflation lumen, a guidewire receiving lumen, an inner tubular member with a distal section of the guidewire lumen therein, and a distal tip member secured to a distal end of the inner tubular member to define a distal end section of the guidewire lumen;
b) an inflatable balloon on a distal shaft section having a working length between proximal and distal cone sections, and a proximal skirt section and a distal skirt section sealingly secured to the shaft such that an inflatable interior of the balloon is in fluid communication with the inflation lumen; and
c) a distal coupling band member on an outer surface of the inner tubular member surrounding a junction of the inner tubular member, having a distal end which abuts an inner surface of the balloon at a distal end of the distal cone section.
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Abstract
A catheter having shaft segments which are joined together by a strong bond providing a low profile shaft section with a flexibility transition and/or a compositional transition. A balloon catheter embodying features of the invention has a distal tip member and a coupling band member surrounding a junction of an inner tubular member of the shaft, and has a gradual change in bending stiffness along a distal end section of the shaft which extends distally from a location within the balloon interior. Another catheter embodying features of the invention has shaft segments joined together by a diagonal seam.
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Citations
24 Claims
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1. A balloon catheter having a distal tip member, comprising:
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a) an elongated shaft having a proximal end, a distal end, an inflation lumen, a guidewire receiving lumen, an inner tubular member with a distal section of the guidewire lumen therein, and a distal tip member secured to a distal end of the inner tubular member to define a distal end section of the guidewire lumen; b) an inflatable balloon on a distal shaft section having a working length between proximal and distal cone sections, and a proximal skirt section and a distal skirt section sealingly secured to the shaft such that an inflatable interior of the balloon is in fluid communication with the inflation lumen; and c) a distal coupling band member on an outer surface of the inner tubular member surrounding a junction of the inner tubular member, having a distal end which abuts an inner surface of the balloon at a distal end of the distal cone section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 23)
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11. A balloon catheter having shaft segments joined by a diagonal seam, comprising:
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a) an elongated shaft having a proximal end, a distal end, an inflation a lumen, a guidewire lumen, a proximal tubular member, and a distal tubular member which has a diagonally extending proximal end bonded to a diagonally extending distal end of the proximal tubular member, such that a bond between the ends extends from a first side of the shaft diagonally to an opposite side of the shaft to form a diagonal seam; and b) an inflatable balloon on a distal shaft section having a working length and proximal and distal cone sections, and a proximal skirt section and a distal skirt section sealingly secured to the shaft such that an interior of the balloon is in fluid communication with the inflation lumen. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A balloon catheter having a distal tip member, comprising:
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a) an elongated shaft having a proximal end, a distal end, an inflation lumen, a guidewire receiving lumen, an inner tubular member with a distal section of the guidewire lumen therein, and a distal tip member secured to a distal end of the inner tubular member at a junction, the distal tip member being made from a softer polymeric material than the inner tubular member; b) an inflatable balloon on a distal shaft section having a working length between proximal and distal cone sections, and a proximal skirt section and a distal skirt section sealingly secured to the shaft such that an inflatable interior of the balloon is in fluid communication with the inflation lumen; and c) a distal coupling band member on an outer surface of the inner tubular member surrounding the junction of the inner tubular member and distal tip member, the distal coupling band member having a distal end which abuts an inner surface of the balloon at a distal end of the distal cone section. - View Dependent Claims (20, 21, 22, 24)
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Specification