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 vessel into a first and a second branch vessels, comprising the steps of:
- providing a delivery catheter having a stent thereon, the stent having a proximal end and a distal end and being self expandable to a configuration in which the proximal end has a smaller diameter than the distal end;
positioning the catheter such that the stent is at a treatment site within the main vessel with the distal end adjacent the bifurcation;
deploying the stent in the main vessel such that the distal end communicates with both the first and the second branch vessels; 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.
251 Citations
33 Claims
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1. A method of treating a vascular bifurcation of a main 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 a proximal end and a distal end and being self expandable to a configuration in which the proximal end has a smaller diameter than the distal end;
positioning the catheter such that the stent is at a treatment site within the main vessel with the distal end adjacent the bifurcation;
deploying the stent in the main vessel such that the distal end communicates with both the first and the second branch vessels; and
eluting a drug from the stent at the treatment site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A deployment system for treating a bifurcation of a main vessel and a first and second branch vessels, comprising:
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an elongate, flexible body, having a proximal end and a distal end;
a first stent carried by the distal end of the body;
a drug, releasably carried by the stent;
a releasable restraint, for retaining the stent on the flexible body;
wherein the distal end of the stent is larger in diameter than the proximal end of the stent in an unconstrained expanded configuration. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of treating a vascular bifurcation of a main 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 distal to the bifurcation;
deploying a tapered stent in the main vessel, proximal to the bifurcation, such that the tapered stent tapers in the distal direction from a smaller proximal diameter to a larger distal diameter which faces the bifurcation; and
delivering an active agent from at least one of the cylindrical and the tapered stents. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33)
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Specification