Two-step/dual-diameter balloon angioplasty catheter for bifurcation and side-branch vascular anatomy
First Claim
1. A balloon catheter for use in a vascular bifurcation or side-branch anatomy, comprising:
- 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.
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Abstract
The present invention tackles the challenging anatomic characteristics of the coronary artery disease in the bifurcation point and the origin of side-branch. The invention has a specifically designed angioplasty balloon catheter, particularly the balloon shape and profile, to be used in the diseased vessels at these difficult anatomic locations. In stent implanting into a coronary artery, a balloon catheter application is an inseparable requirement. A stent is a passive device that cannot be deployed in a diseased or stenosed artery without a pre-stent, with-stent and/or post-stent balloon dilatation. In majority (more than 95%) of available coronary stents, a stent is deployed by balloon expandable mode, meaning that the stent is delivered and expanded inside a vessel lumen by expanding a delivery balloon. This is done by crimping a stent over a folded balloon for delivery into a coronary artery. When expanded by balloon inflation, a stent is expanded and shaped passively by the inflated balloon shape and profile. The balloon catheter is designed to do angioplasty in the bifurcation and side-branch anatomy of coronary arteries, while minimizing the side effect. This specially designed balloon catheter is not only for balloon angioplasty dilatation of the bifurcation and side-branch anatomy, but is also for delivering and deploying specially designed bifurcation or side-branch stents into these difficult anatomic locations, as a stent delivery system.
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Citations
64 Claims
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1. 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 (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An angioplasty balloon catheter for use in a vascular anatomy, comprising:
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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 (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. 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 (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
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64. 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
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Current AssigneeJang G. David
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Original AssigneeJang G. David
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InventorsJang, G. David
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Application NumberUS10/943,787Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current604/194CPC Class CodesA61F 2/958 Inflatable balloons for pla...A61M 25/1002 characterised by balloon sh...
