Balloon catheter with stent securement means
First Claim
1. A catheter assembly, comprising:
- a catheter having a proximal and distal ends;
an expandable outer balloon coaxially mounted on the distal end of the catheter, the expandable outer balloon having a collapsed state and an expanded state, a distal end and a proximal end and an inner wall and an outer wall;
a stent coaxially mounted on the expandable outer balloon, the stent having an expanded; and
a first inner expandable balloon coaxially mounted on the catheter within the expandable balloon, the first inner expandable balloon having a collapsed state and an expanded state and a distal end and a proximal end, the catheter having a first inflation conduit in direct fluid communication with the inner wall of the expandable outer balloon, the first inflation conduit designed to inflate the expandable outer balloon to its expanded state.
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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
29 Claims
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1. A catheter assembly, comprising:
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a catheter having a proximal and distal ends;
an expandable outer balloon coaxially mounted on the distal end of the catheter, the expandable outer balloon having a collapsed state and an expanded state, a distal end and a proximal end and an inner wall and an outer wall;
a stent coaxially mounted on the expandable outer balloon, the stent having an expanded; and
a first inner expandable balloon coaxially mounted on the catheter within the expandable balloon, the first inner expandable balloon having a collapsed state and an expanded state and a distal end and a proximal end, the catheter having a first inflation conduit in direct fluid communication with the inner wall of the expandable outer balloon, the first inflation conduit designed to inflate the expandable outer balloon to its expanded state. - 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, 29)
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Specification