Bifurcation stent delivery system
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Abstract
The present invention is drawn to a system for deploying a stent at a bifurcation. In one embodiment, the system includes a stepped balloon which has a first section of a first diameter, and a second section of a second diameter. The first portion is sized to deploy a first stent portion, having a larger deployed diameter, while the second portion is sized to deploy a second stent portion, having a smaller deployed diameter.
109 Citations
113 Claims
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1-24. -24. (canceled)
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25. A balloon catheter for use in treating a vascular bifurcation, comprising:
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(a) a catheter shaft having a distal end portion; and
(b) a stepped balloon positioned at the distal end portion of the catheter shaft, the stepped balloon including;
(i) a proximal portion having an outer surface that defines a first average diameter, the proximal portion defining a proximal end portion of the stepped balloon, the proximal portion configured for placement at a proximal portion of the vascular bifurcation;
(ii) a distal portion having an outer surface that defines a second average diameter, the second average diameter being smaller than the first average diameter, the distal portion defining a distal end portion of the stepped balloon, the distal portion configured for placement at a distal portion of the vascular bifurcation; and
(iii) a transition portion extending between the first and second portions. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A balloon catheter assembly for use in a vascular anatomy, the assembly comprising:
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(a) a catheter shaft having a distal end portion and defining an inflation lumen; and
(b) a balloon extending from the distal end portion of the catheter shaft, the balloon having a shaped outer geometry that includes;
(i) a first portion having a first diameter, the first portion defining a proximal end portion of the balloon; and
(ii) a second portion having a second diameter that is less than the first diameter, the second portion defining a distal end portion of the balloon. - View Dependent Claims (37, 38, 39, 40, 41, 42)
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43. A method of treating a vascular bifurcation or side-branch anatomy with a balloon catheter, the balloon catheter including a balloon having a first balloon portion, a second balloon portion, and a transition portion, the first and second balloon portions having different outer diameters, the method comprising:
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mounting a stent in a unexpanded state on an exterior of the balloon;
positioning the balloon with the stent in a unexpanded state at a vascular bifurcation with the first balloon portion extending proximal of the vascular bifurcation and the distal balloon portion extending distal of the vascular bifurcation;
inflating the balloon to expand the stent into an expanded state at the vascular bifurcation; and
removing the balloon catheter from the vascular bifurcation. - View Dependent Claims (44)
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45. A catheter balloon, comprising:
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(a) a proximal portion having an outer surface that defines a first average diameter, the proximal portion defining a proximal end portion of the stepped balloon, the proximal portion configured for placement at a proximal portion of the vascular bifurcation;
(b) a distal portion having an outer surface that defines a second average diameter, the second average diameter being smaller than the first average diameter, the distal portion defining a distal end portion of the stepped balloon, the distal portion configured for placement at a distal portion of the vascular bifurcation; and
(c) a transition portion that extends from the proximal portion to the distal portion. - View Dependent Claims (46, 47, 48, 49)
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50. A balloon catheter for use in a vascular bifurcation or side-branch anatomy, comprising:
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a catheter body; and
a balloon positioned at a distal portion of the catheter body, the balloon including a balloon outer skin, a first lumen adapted to receive a guidewire and a second lumen configured to provide inflation and deflation of the balloon, the balloon having a first section with a first average diameter, and second section with a second average diameter that is smaller than the first average diameter, the first and second sections being coupled by a transition section that has a geometry and is sized to reduce vessel damage when position at a point of vessel bifurcation. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71)
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72. An angioplasty balloon catheter for use in a vascular anatomy, comprising:
- an angioplasty catheter body; and
a tubular balloon coupled to a distal end of the angioplasty catheter body and including, a shaped balloon skin, a catheter shaft with a first lumen configured to receive a guidewire and a second lumen configured to be provide inflation-deflation of the balloon, the balloon having a shaped outer geometry and size to reduce vessel damage when position at a point of vessel bifurcation. - View Dependent Claims (73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93)
- an angioplasty catheter body; and
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94. A stent delivery device, comprising:
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a catheter body;
a balloon positioned at a distal portion of the catheter body, the balloon including a balloon outer skin, a first lumen adapted to receive a guidewire and a second lumen configure to provide inflation and deflation of the balloon, the balloon having a first section with a first average diameter, and second section with a second average diameter that is smaller than the first average diameter, the first and second sections being coupled by a transition section that has a geometry and is sized to reduce vessel damage when position at a point of vessel bifurcation; and
a vascular stent positioned on an exterior of the balloon exterior. - View Dependent Claims (95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112)
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113. A method of treating a vascular bifurcation or side-branch anatomy, comprising:
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providing a catheter that includes a balloon with a transition section that couples a first section with a second section, the transition section having a geometry and size to reduce vessel damage when position at a point of vessel bifurcation;
mounting a stent in a non-expanded on an exterior of the balloon;
positioning the catheter with the stent in a non-expanded state at a vascular bifurcation or a vascular side-branch site;
inflating the balloon and deploying the stent in an expanded state at the vascular bifurcation or vascular side-branch site; and
removing the catheter from the vascular bifurcation or a vascular side-branch site.
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Specification