Balloon catheter with stent securement means
First Claim
1. An assembly for delivery and deployment of an expandable stent within a vessel, comprising:
- a catheter having proximal and distal ends and an inner shaft;
an expandable balloon coaxially mounted on the catheter; and
a tube component coaxially mounted on the catheter axially within the expandable means, wherein the tube component is attached to the inner shaft at at least two consecutive points, the tube component having an outer wall, the outer wall comprising a plurality of ribs between the at least two consecutive points.
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 device 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.
171 Citations
31 Claims
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1. An assembly for delivery and deployment of an expandable stent within a vessel, comprising:
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a catheter having proximal and distal ends and an inner shaft;
an expandable balloon coaxially mounted on the catheter; and
a tube component coaxially mounted on the catheter axially within the expandable means, wherein the tube component is attached to the inner shaft at at least two consecutive points, the tube component having an outer wall, the outer wall comprising a plurality of ribs between the at least two consecutive points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
providing a catheter having proximal and distal ends, with an expandable balloon coaxially mounted on the catheter, and a tube component having a plurality of ribs coaxially mounted on the catheter, axially within the expandable balloon, so that the balloon is 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;
delivering the assembly to a deployment site; and
inflating the balloon to expand the stent to its deployment diameter.
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14. The method according to claim 13, wherein the tube component is a corrugate tubing adhered to the catheter formed of a low modulus polymer and having a diameter of approximately that of the delivery diameter.
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15. The method according to claim 13, 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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16. The assembly according to claim 1 wherein the tube component is an expandable tube component coaxially mounted on the catheter, axially within the expandable balloon, the tube component designed and adapted for fluid expansion to provide a securement pressure to the stent in the delivery diameter to maintain the stent in position on the catheter during delivery to the deployment site, the assembly further comprising a stent, inflation 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.
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17. The assembly according to claim 16, wherein the expandable tube component is sized and constructed to be fluid expandable to no more than the delivery diameter and to no more than the securement pressure.
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18. The assembly according to claim 17, wherein the tube component is comprised of more than one inflatable pouch.
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19. The assembly according to claim 18, 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 16, 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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21. A method for delivering and deploying a stent using an assembly according to claim 16, comprising:
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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, axially 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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22. The method according to claim 21, wherein the expandable tube component is sized and constructed to be fluid expandable to no more than the delivery diameter.
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23. The method according to claim 21, 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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24. The method according to claim 21, wherein the tube component is comprised of more than one inflatable pouch.
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25. The method according to claim 24, 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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26. The assembly according to claim 1, wherein the outer wall forms undulations.
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27. The assembly according to claim 26, the tube component having a length, wherein the undulations are formed along the length of the tube component.
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28. The assembly according to claim 26, wherein the undulations form peaks and troughs and wherein the peaks form the plurality of ribs.
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29. An assembly for delivery and deployment of an inflation expandable stent within a vessel, comprising:
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a catheter having proximal and distal ends and an inner shaft;
a stent, inflation 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 axially; and
a securement means for securing the stent to the balloon, the securement means coaxially mounted on the catheter axially within the expandable balloon. - View Dependent Claims (30, 31)
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Specification