Balloon catheter with stent securement means
First Claim
1. An assembly for delivery and deployment of a stent within a vessel, comprising:
- a catheter having a proximal and distal ends;
a stent, expandable from a delivery diameter to a deployment diameter, such that the delivery diameter is reduced from the deployment diameter for conforming the stent to the catheter, such that the stent, in its delivery diameter, is coaxially mounted on the catheter near the catheter distal end;
an expandable balloon coaxially mounted on the catheter within the stent for expansion of the stent from the delivery diameter to the deployment diameter upon application of deployment pressure to the balloon; and
an expandable tube component coaxially mounted on the catheter within the expandable balloon, wherein the expandable balloon and the expandable tube component are independently expandable relative to one another and wherein the expandable balloon is capable of being substantially collapsed when the expandable tube component is fully expanded.
1 Assignment
0 Petitions
Accused Products
Abstract
An assembly for delivery and deployment of an inflation expandable stent within a vessel is comprised of a catheter, an inflation expandable stent, an expandable balloon, and a securement means such as a corrugated tube component or an expandable tube component. The tube component is mounted on the inner shaft beneath the balloon and provides increased securement to the stent in a reduced delivery diameter to maintain the stent on the catheter during delivery to the deployment site. The tube component is adhered to the inner shaft and has a plurality of ribs or is fluid expandable to no more than the delivery diameter. and may be comprised of more than one separately inflatable pouch expandable to provide the stent with a substrate seat with increased friction and to decrease the slack in stent recoil crimping. The assembly is used in a method for delivering and deploying a stent, and also adds safety when loading/crimping the stent onto a balloon.
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Citations
47 Claims
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1. An assembly for delivery and deployment of a stent within a vessel, comprising:
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a catheter having a proximal and distal ends;
a stent, expandable from a delivery diameter to a deployment diameter, such that the delivery diameter is reduced from the deployment diameter for conforming the stent to the catheter, such that the stent, in its delivery diameter, is coaxially mounted on the catheter near the catheter distal end;
an expandable balloon coaxially mounted on the catheter within the stent for expansion of the stent from the delivery diameter to the deployment diameter upon application of deployment pressure to the balloon; and
an expandable tube component coaxially mounted on the catheter within the expandable balloon, wherein the expandable balloon and the expandable tube component are independently expandable relative to one another and wherein the expandable balloon is capable of being substantially collapsed when the expandable tube component is fully expanded. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
providing a catheter having proximal and distal ends, with an expandable balloon coaxially mounted on the catheter, and an expandable tube component coaxially mounted on the catheter within the expandable balloon, so that the balloon and the tube component are each in an unexpanded condition;
providing a stent which is expandable from a delivery diameter to a deployment diameter;
mounting the stent, in a diameter greater than the delivery diameter, on the balloon;
contracting the stent to the delivery diameter to conform to an overall profile of the catheter, the tube component and the balloon;
inflating the tube component to provide to the stent a securement pressure to retain the stent in the delivery diameter;
delivering the assembly to a deployment site; and
inflating the balloon to expand the stent to its deployment diameter.
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15. The method according to claim 14, wherein the expandable tube component is sized and constructed to be fluid expandable to no more than the delivery diameter.
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16. The method according to claim 14, wherein the tube component is essentially equal in length to the stent and wherein the stent is positioned on the assembly essentially coextensive with the tube component.
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17. The method according to claim 14, wherein the tube component is comprised of at least two inflatable pouches.
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18. The assembly according to claim 17, wherein the at least two pouches are separately inflatable.
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19. The method according to claim 14, wherein the tube component is comprised of three pouches, with a proximal and distal pouch inflatable to a greater pressure than a medial pouch.
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20. The assembly according to claim 19, wherein the pouches are separately inflatable.
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21. An assembly for delivery and deployment of a stent within a vessel, comprising:
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a catheter having a proximal and distal ends;
an expandable balloon coaxially mounted on the catheter for expansion upon application of pressure to the balloon; and
an expandable tube component coaxially mounted on the catheter within the expandable balloon, wherein the expandable balloon and the expandable tube component are independently expandable relative to one another and wherein the expandable balloon is capable of being substantially collapsed when the expandable tube component is fully expanded. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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33. An assembly for delivery and deployment of a stent within a vessel, comprising:
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a catheter having a proximal and distal ends;
a stent, expandable from a delivery diameter to a deployment diameter, such that the delivery diameter is reduced from the deployment diameter for conforming the stent to the catheter, such that the stent, in its delivery diameter, is coaxially mounted on the catheter near the catheter distal end;
an expandable balloon coaxially mounted on the catheter within the stent for expansion of the stent from the delivery diameter to the deployment diameter upon application of deployment pressure to the balloon, the balloon having an inner wall, an expanded state and a collapsed state; and
an expandable tube component coaxially mounted on the catheter within the expandable balloon, the expandable tube having an outer wall, an expanded state and a collapsed state, wherein, when the expandable balloon and the expandable tube component are in their expanded states, there is a gap between the inner wall of the expandable balloon and the outer wall of the expandable tube component and wherein the expandable balloon is capable of being substantially collapsed when the expandable tube component is fully expanded. - View Dependent Claims (46, 47)
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Specification