Combined shaped balloon and stent protector
First Claim
1. A stent delivery catheter, the catheter comprising:
- a catheter shaft, and a balloon, the balloon being mounted to the catheter shaft, the balloon when unconstrained being inflatable to a first inflation state at a first pressure where the balloon is nominally inflated by unfolding without substantial expansion and to a second inflation state at a second pressure higher than the first pressure, the balloon having a stent mounting region, at least one adjacent region, and at least one cone region, the at least one adjacent region being positioned between the stent mounting region and the at least one cone region, the stent mounting region having a stent mounting region inner diameter and the at least one adjacent region having an adjacent region inner diameter;
wherein when the balloon is in the first inflation state the stent mounting region inner diameter is less than the adjacent region inner diameter, and when the balloon is in the second inflation state the stent mounting region inner diameter is substantially the same as the adjacent region inner diameter.
2 Assignments
0 Petitions
Accused Products
Abstract
A stent delivery catheter comprising a catheter shaft and balloon engaged thereto. The balloon being inflatable from a first inflation state to a first expanded state as well as to a second expanded state. The balloon having a stent mounting region for retaining and delivery of a stent therefrom, and at least one adjacent region. The stent mounting region having a first diameter and the at least one adjacent region having a second diameter. In the first inflation state the first diameter being less than the second diameter. In the first expanded state the first diameter being no greater than the second diameter. In the second expanded state the first diameter being greater than the second diameter. The stent being retained on the stent mounting region by engagement of the at least one adjacent portion and at least one retractable stent retaining sleeve.
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Citations
32 Claims
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1. A stent delivery catheter, the catheter comprising:
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a catheter shaft, and a balloon, the balloon being mounted to the catheter shaft, the balloon when unconstrained being inflatable to a first inflation state at a first pressure where the balloon is nominally inflated by unfolding without substantial expansion and to a second inflation state at a second pressure higher than the first pressure, the balloon having a stent mounting region, at least one adjacent region, and at least one cone region, the at least one adjacent region being positioned between the stent mounting region and the at least one cone region, the stent mounting region having a stent mounting region inner diameter and the at least one adjacent region having an adjacent region inner diameter;
wherein when the balloon is in the first inflation state the stent mounting region inner diameter is less than the adjacent region inner diameter, and when the balloon is in the second inflation state the stent mounting region inner diameter is substantially the same as the adjacent region inner diameter. - View Dependent Claims (2, 3, 4, 5, 9, 10, 11, 15, 16, 17, 18, 19, 20, 21, 23)
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6. A stent delivery catheter, the catheter comprising:
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a catheter shaft;
a balloon, the balloon being mounted to the catheter shaft, the balloon being inflatable to a first inflation state and to a second inflation state, the balloon having a stent mounting region, at least one adjacent region, and at least one cone region, the at least one adjacent region being positioned between the stent mounting region and the at least one cone region, the stent mounting region having a stent mounting region diameter, the at least one adjacent region having an adjacent region diameter and the at least one cone region having a cone region diameter, the balloon having an inflation curve wherein when the balloon is in the first inflation state the stent mounting region diameter is less than the adjacent region diameter, in the second inflation state the stent mounting region diameter is substantially the same as the adjacent region diameter, in both the first inflation state and the second inflation state the cone region diameter is less than the adjacent region diameter;
a stent, the stent being disposed about at least a portion of the stent mounting region, the stent being expandable from an unexpanded state to a first stent expanded state, the stent further comprising a stent center, a first stent end and a second stent end; and
a first stent retaining sleeve and a second stent retaining sleeve, the first stent retaining sleeve having a stent retaining portion removingly disposed about the first stent end and a catheter engagement portion engaged to a first portion of the catheter shaft, the second stent retaining sleeve having a stent retaining portion removingly disposed about the second stent end and a catheter engagement portion engaged to a second portion of the catheter shaft;
wherein when the balloon is expanded from the first inflation state to the second inflation state the stent is expanded from the unexpanded state to the first stent expanded state; and
wherein the stent mounting region is characterized as having a stepped compliance curve and the adjacent region is characterized as having a substantially linear compliance curve, the stepped compliance curve being characterized by a low pressure segment defined by a low inflation pressure range, said low pressure segment being generally collinear with a corresponding segment of the generally linear compliance curve of the at least one adjacent region which is defined by said low inflation pressure range, a transition segment during which the balloon expands rapidly relative to the at least one adjacent region and a high pressure segment during which the compliance curve of the stent mounting region expands slowly relative to the transition segment. - View Dependent Claims (7, 8, 12, 13, 14, 22)
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24. A stent delivery catheter comprising:
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a catheter shaft;
a balloon, the balloon being mounted to a distal portion of the catheter shaft, the balloon being inflatable to a first inflation state at a first pressure where the balloon is nominally inflated by unfolding without substantial expansion and to a second inflation state at a second pressure higher than the first pressure, the balloon having a stent mounting region, and a pair of balloon regions adjacent to the stoat mounting region, each of the balloon regions being positioned between the stent mounting region and a cone region of the balloon, the pair of balloon regions comprising;
a proximal adjacent region and a distal adjacent region, the stent mounting region having a stent mounting region diameter and each of the adjacent regions having an adjacent region diameter, in the first inflation state the stent mounting region diameter being less than the adjacent region diameter, in the second inflation state the stent mounting region diameter being no greater than the adjacent region diameter;
a stent, the stent being disposed about at least a portion of the stent mounting region, the stent being expandable from an unexpanded state to a first stall expanded state, the stent in the unexpanded state having an outer diameter less than or equal to the outer diameter of at least one of said adjacent regions in the first inflation state, the stent further comprising a stent center, a first stent end and a second stent end; and
a proximal stent retaining sleeve and a distal stent retaining sleeve, each of the stent retaining sleeves having a stent retaining portion and a catheter engagement portion, the stent retaining portion of the distal stent retaining sleeve being removingly disposed about the first stent end, the stent retaining portion of the proximal stent retaining sleeve being removably disposed about the second stent end, the catheter engagement portion of the distal stent retaining sleeve being engaged to a portion of the catheter shaft proximate to the distal adjacent region of the balloon, the catheter engagement portion of the proximal stent retaining sleeve being engaged to a portion of the catheter shaft proximate to the proximal adjacent region of the balloon, whereby when the balloon is inflated from the first inflation state to the second inflation state the at least one stent retaining sleeve is retracted off of the at least one end of the stent. - View Dependent Claims (25, 26, 27, 28, 29)
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30. A stent delivery catheter comprising:
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a catheter shaft;
a balloon, the balloon being mounted to a distal portion of the catheter shaft, the balloon being inflatable to a first inflation state, to a second inflation slate, and to a third inflation state, the balloon having a stent mounting region and a pair of adjacent end regions, the stent mounting region having a stent mounting region diameter and the pair of end regions each having an end region diameter, in the first inflation state the stent mounting region diameter being less that the end region diameter in the second inflation state the stent mounting region diameter being no greater than the end region diameter, in the third inflation state the stent mounting region diameter being greater than the end region diameter; and
a stent, the stent being disposed about at least portion of the stent mounting region, the stent being expandable from an unexpanded state to an expanded state, the stent further comprising a stent center, a first stent end and a second stent end, the stent in the unexpanded state having an outer diameter less than or equal to the outer diameter of a balloon end region in the first inflation state. - View Dependent Claims (31)
a stent retaining portion removingly disposed about one of the ends of the stent, an end region overlaying portion and a catheter engagement portion engaged to a portion of the catheter shaft adjacent to the balloon, whereby when the balloon is inflated from the first inflation state to the second inflation state retaining sleeves are retracted off of the ends of the stent and the end regions of the balloon.
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32. A stent delivery catheter comprising:
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a catheter shaft;
a balloon, the balloon being mounted to a distal portion of the catheter shaft, the balloon being inflatable to a first inflation state, to a second inflation state, and to a third inflation state, the balloon having a stent mounting region and a pair of adjacent end regions, the stent mounting region having a stent mounting region diameter and the pair of end regions each having an end region diameter, in the first inflation state the stent mounting region diameter being less than the end region diameter, in the second inflation state the stent mounting region diameter being no greater than the end region diameter, in the third inflation state the stent mounting region diameter being greater than the end region diameter;
a stent, the stent being disposed about at least a portion of the stent mounting region, the stent being expandable from an unexpanded state to an expanded state, the stent further comprising a stent center, a first stent end and a second stent end; and
a pair of stent retaining sleeves, each of the stent retaining sleeves having a stent retaining portion removingly disposed about one of the ends of the stent, an end region overlaying portion and a catheter engagement portion engaged to a portion of the catheter shaft adjacent to the balloon, whereby when the balloon is inflated from the first inflation state to the second inflation state the stent retaining sleeves are retracted off of the ends of the stent and the end regions of the balloon;
wherein when the balloon is in the first inflation state and the second inflation state the pair of end regions are engaged to the first stent end and the second stent end respectively, thereby preventing longitudinal movement of the stent relative to the balloon.
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Specification