Stent delivery catheter system with high tensile strength
First Claim
1. A stent delivery catheter system, comprisinga) an elongated delivery catheter having an inner tubular member, a stent holder region, a guidewire lumen-defining tubular member extending within at least a distal section of the inner tubular member, a distal tip at a distal end of the guidewire lumen-defining tubular member, an outer tubular member which has a stent restraining region and which is adapted for axial movement with respect to the stent holder region to transition from an advanced configuration surrounding the stent holder region to a proximally retracted configuration, and having a reinforcing tether member secured to the inner tubular member, which has a distal end length extending helically in the distal tip member or proximally adjacent to the proximal end of the distal tip member, and a substantially axially aligned section which extends substantially straight from the proximal end of the helical end length and through the stent holder region such that the tether member is configured to enhance the tensile strength of the catheter;
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Accused Products
Abstract
A stent delivery catheter system having a reinforcing tether member secured to the catheter such that the catheter is provided with an improved combination of an enhanced tensile strength together with other catheter performance characteristics such as low profile and high flexibility. The stent delivery system includes an elongated delivery catheter including a reinforcing tether member secured to the inner tubular member of the catheter. The tether member has a distal end length extending helically from the distal tip member or proximally adjacent to the proximal end of the distal tip member of the catheter and a portion that also extends axially through the stent holder region of the catheter. This reinforcing tether member provides enhanced tensile strength to the catheter.
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Citations
24 Claims
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1. A stent delivery catheter system, comprising
a) an elongated delivery catheter having an inner tubular member, a stent holder region, a guidewire lumen-defining tubular member extending within at least a distal section of the inner tubular member, a distal tip at a distal end of the guidewire lumen-defining tubular member, an outer tubular member which has a stent restraining region and which is adapted for axial movement with respect to the stent holder region to transition from an advanced configuration surrounding the stent holder region to a proximally retracted configuration, and having a reinforcing tether member secured to the inner tubular member, which has a distal end length extending helically in the distal tip member or proximally adjacent to the proximal end of the distal tip member, and a substantially axially aligned section which extends substantially straight from the proximal end of the helical end length and through the stent holder region such that the tether member is configured to enhance the tensile strength of the catheter; - and
b) a self-expanding stent which is in a collapsed configuration surrounding the stent holder region of the catheter with the catheter outer tubular member in the advanced configuration, and which is configured to be deployed by radially self-expanding from the collapsed configuration upon movement of the catheter outer tubular member to the retracted configuration. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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4. A stent delivery catheter system, comprising
a) an elongated delivery catheter having an inner tubular member, a stent holder region, a guidewire lumen-defining tubular member extending within at least a distal section of the inner tubular member, a distal tip at a distal end of the guidewire lumen-defining tubular member, an outer tubular member which has a stent restraining region and which is adapted for axial movement with respect to the stent holder region to transition from an advanced configuration surrounding the stent holder region to a proximally retracted configuration, and having a reinforcing tether member secured to the distal tip member and secured to the inner tubular member, which extends at least in part helically in the distal tip member, and includes a substantially axially aligned section which extends substantially straight from the proximal end of the distal tip member on the guidewire lumen-defining tubular member and through the stent holder region such that the tether member is configured to enhance the tensile strength of the catheter; - and
b) a self-expanding stent which is in a collapsed configuration surrounding the stent holder region of the catheter with the catheter outer tubular member in the advanced configuration, and which is configured to be deployed by radially self-expanding from the collapsed configuration upon movement of the catheter outer tubular member to the retracted configuration.
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19. A stent delivery catheter system, comprising
a) an elongated delivery catheter having an inner member, a stent holder region, a guidewire lumen-defining tubular member extending within the stent holder region, a distal tip at a distal end of the guidewire lumen-defining tubular member, an outer tubular member which has a stent restraining region and which is adapted for axial movement with respect to the stent holder region to transition from an advanced configuration surrounding the stent holder region to a proximally retracted configuration, and having a reinforcing tether member which includes a substantially axially aligned section that extends substantially straight through the stent holder region and on at least a portion of the guidewire lumen-defining tubular member from a distal end of the inner tubular member to a proximal end of the distal tip member and which has an annular distal end extending around the circumference of the guidewire lumen-defining tubular member; - and
b) a self-expanding stent which is in a collapsed configuration surrounding the stent holder region of the catheter with the catheter outer tubular member in the advanced configuration, and which is configured to be deployed by radially self-expanding from the collapsed configuration upon movement of the catheter outer tubular member to the retracted configuration. - View Dependent Claims (20)
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21. A stent delivery catheter system, comprising:
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a) an elongated delivery catheter having an inner tubular member, a stent holder region, a guidewire lumen-defining tubular member extending within at least a distal section of the inner tubular member, a distal tip at a distal end of the guidewire lumen-defining tubular member, an outer tubular member which has a stent restraining region and which is adapted for axial movement with respect to the stent holder region to transition from an advanced configuration surrounding the stent holder region to a proximally retracted configuration, a reinforcing tether member secured to the inner tubular member, which has a distal end length extending helically in the distal tip member or proximally adjacent to the proximal end of the distal tip member, and which has a proximal portion that extends axially on the guidewire lumen-defining tubular member from the proximal end of the helical end length and includes a substantially axially aligned section that extends substantially straight through the stent holder region, the inner tubular member having a coil or braided reinforcing member embedded therein which extends proximal to the stent holder region, wherein the reinforcing tether member is an integral extension of, or is bonded to, the axial portion of reinforcing member; and b) a self-expanding stent which is in a collapsed configuration surrounding the stent holder region of the catheter with the catheter outer tubular member in the advanced configuration, and which is configured to be deployed by radially self-expanding from the collapsed configuration upon movement of the catheter outer tubular member to the retracted configuration. - View Dependent Claims (22, 23, 24)
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Specification