Noncylindrical drug eluting stent for treating vascular bifurcations
First Claim
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1. A method of treating a vascular bifurcation of a main coronary vessel into a first and a second branch vessels, comprising the steps of:
- providing a delivery catheter having a stent thereon, the stent having an upstream end and a downstream end with at least one marker on the downstream end, and being self expandable to a configuration having a single central lumen in which the upstream end has a smaller dimension than the downstream end;
positioning the catheter such that the stent is at a treatment site within the main coronary vessel with the downstream end adjacent the vascular bifurcation;
deploying the stent in the main coronary vessel such that the stent self expands to a configuration in which the upstream end of the stent has a smaller dimension than the downstream end of the stent, and in which the downstream end communicates with both the first and the second branch vessels, wherein said deploying comprises moving a releasable restraint having a plurality of expansion limiting bands with respect to said stent; and
eluting a drug from the stent at the treatment site.
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Abstract
A device and method for treating pathological narrowing of fluid-carrying conduits of the human body (such as blood vessels) in an area of a bifurcation is disclosed. In particular, a stent delivery system configured to carry one or more of a pair of dissimilar stents. At least one of the stents is particularly suited for treating a widened portion of a blood vessel immediately proximal to a bifurcation. The stent delivery system can also include a handpiece adapted to selectively deliver the stents.
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Citations
27 Claims
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1. A method of treating a vascular bifurcation of a main coronary vessel into a first and a second branch vessels, comprising the steps of:
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providing a delivery catheter having a stent thereon, the stent having an upstream end and a downstream end with at least one marker on the downstream end, and being self expandable to a configuration having a single central lumen in which the upstream end has a smaller dimension than the downstream end; positioning the catheter such that the stent is at a treatment site within the main coronary vessel with the downstream end adjacent the vascular bifurcation; deploying the stent in the main coronary vessel such that the stent self expands to a configuration in which the upstream end of the stent has a smaller dimension than the downstream end of the stent, and in which the downstream end communicates with both the first and the second branch vessels, wherein said deploying comprises moving a releasable restraint having a plurality of expansion limiting bands with respect to said stent; and eluting a drug from the stent at the treatment site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of treating a vascular bifurcation of a main coronary vessel into first and second branch vessels, comprising the steps of:
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deploying a substantially cylindrical stent in a first branch vessel which is downstream with respect to the bifurcation; deploying a tapered stent in the main coronary vessel, upstream with respect to the bifurcation, such that the tapered stent has at least one marker and a single central lumen and tapers in the downstream direction from a smaller upstream end to a larger downstream end which faces the bifurcation, wherein said deploying a tapered stent comprises moving a releasable restraint having a plurality of expansion limiting bands with respect to said tapered stent; and delivering an active agent from at least one of the cylindrical and the tapered stents. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification