Kit for treating vascular bifurcations
A stepped balloon catheter prosthesis deployment system is disclosed for placement of a prosthesis across an Os opening from a main body lumen to a branch body lumen. The prosthesis comprises a radially expansible support at one end, a circumferentially extending link at the other end and at least one frond extending axially therebetween. The prosthesis is configured to be deployed from a stepped diameter balloon with the support in the branch body lumen, with the circumferentially extending link in the main lumen and the frond extendable across the Os.
1. A kit for stenting a bifurcation in a vessel, comprising:
a branch vessel stent, having a proximal end, a distal end, and at least two fronds extending from either the proximal or distal end;
a circumferential link separated from the branch vessel stent by the at least two fronds; and
a main vessel stent, separate from the branch vessel stent, the main vessel stent for entrapping the at least two fronds of the branch vessel stent against a vessel wall;
wherein the at least two fronds have sufficient length to extend into and expandably circumscribe a main vessel wall and reach a portion of the main vessel wall opposing an ostium opening at the intersection of the main vessel and branch vessel when the branch vessel stent is implanted in the branch vessel adjacent to the ostium opening such that a flow path is maintained in the main vessel through the circumferential link and beyond the ostium opening.
2. A kit as in claim 1 , additionally comprising a first balloon catheter for deploying the branch vessel stent.
3. A kit as in claim 2 , additionally comprising a second balloon catheter for deploying the main vessel stent.
4. A kit as in claim 2 , wherein the distal end of the branch vessel stent is carried by a first portion of the first balloon that is inflatable to a first diameter and at least a portion of the at least two fronds is carried by a second portion of the first balloon that is inflatable to a second diameter that is larger than the first diameter.
5. The kit as in claim 2 , wherein the first balloon catheter comprises a single, stepped balloon having a proximal section with a larger inflated diameter than an inflated diameter of a distal section.
6. The kit as in claim 2 , wherein the first balloon has an inflated profile with a first section having a first diameter, a second section having a second diameter, and a balloon transition in between the first and second sections, the branch vessel stent being carried by the first balloon, and wherein the branch vessel stent has a wall having a first wall pattern adjacent the first section of the balloon, and a second wall pattern adjacent the balloon transition.
7. The kit as in claim 6 , wherein the branch vessel stent has a third wall pattern adjacent the second section of the balloon.
8. A kit as in claim 1 , wherein the at least two fronds includes at least three fronds.
9. A kit as in claim 1 , wherein the at least two fronds comprises a helical configuration.
10. A kit as in claim 1 , wherein at least a portion of the at least two fronds comprises a lubricous coating.
11. A kit as in claim 1 , comprising an endothelial cell ingrowth surface.
12. A kit as in claim 1 , comprising a non thrombogenic surface.
13. A kit as in claim 1 , wherein at least a portion of the branch vessel stent comprises a drug coating, and at least a portion of the fronds and the circumferential link are without a drug coating.
14. A kit as in claim 13 , wherein the drug coating is configured to produce at least one of a controlled drug release rate, a constant drug release rate, bi-modal drug release rate or a controlled concentration of drug proximate a target vessel wall.
15. A kit as in claim 13 , wherein the drug is one of an anti-cell proliferative, anti cell migration, anti-neo plastic, anti inflammatory drug.
16. A kit as in claim 13 , wherein the drug is configured to reduce an incidence or amount of restensosis.
17. A kit as in claim 13 , wherein the drug coating includes a first coating and a second coating.
18. A kit as in claim 17 , wherein the first coating is configured to produce a first drug release rate and the second coating is configured to produce a second drug release rate.
19. A kit as in claim 1 , wherein the circumferential link is expandable from a first, reduced diameter to a second, enlarged diameter.
20. A kit as in claim 1 , wherein the branch vessel stent is on a first end of at least one of the at least two fronds, and the circumferential link is on a second end of at least one of the at least two fronds.
21. A kit as in claim 1 , wherein the circumferential link is radiopaque.
22. A kit as in claim 1 , wherein the circumferential link has a greater radiopacity than the fronds.