Stent and catheter assembly and method for treating bifurcations
First Claim
1. A stent for treating a bifurcated vessel having a main vessel and a side branch vessel, comprising:
- cylindrical body having a proximal end, a distal end, and a plurality of rings;
each ring having a delivered diameter, an implanted diameter and a plurality of peaks and a plurality of valleys, the peaks and the valleys being connected by bar arms;
each ring being attached to an adjacent ring by more than one undulating link;
a portal section comprised of one or more rings of the plurality of rings; and
at least some of the bar arms connecting the peaks and the valleys of the one or more rings in the portal section have a length that is relatively longer than the bar arms connecting the peaks and the valleys of rings in a distal section of the stent, wherein at least a portion of a ring of said portal section is nested within a ring in said distal section of the stent such that spaces between adjacent said relatively longer bar arms of said ring of said portal section are circumferentially aligned with spaces between adjacent bar arms of said ring of said distal section so that upon stent expansion the portal section will extend into the side branch vessel.
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Accused Products
Abstract
An improved stent design and stent delivery catheter assembly for repairing a main vessel and a side branch vessel forming a bifurcation. The stent includes rings aligned along a common longitudinal axis and connected by links, where the stent has one or more portals for aligning with and partially expanding into the opening to the side branch vessel. The stent is implanted at a bifurcation so that the main stent section is in the main vessel, and the portal section covers at least a portion of the opening to the side branch vessel. A second stent can be implanted in the side branch vessel and abut the expanded central section to provide full coverage of the bifurcated area in the main vessel and the side branch vessel. Radiopaque markers on the stent and on the tip of the delivery catheter assist in aligning the portal section with the opening to the side branch vessel.
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Citations
21 Claims
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1. A stent for treating a bifurcated vessel having a main vessel and a side branch vessel, comprising:
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cylindrical body having a proximal end, a distal end, and a plurality of rings; each ring having a delivered diameter, an implanted diameter and a plurality of peaks and a plurality of valleys, the peaks and the valleys being connected by bar arms; each ring being attached to an adjacent ring by more than one undulating link; a portal section comprised of one or more rings of the plurality of rings; and at least some of the bar arms connecting the peaks and the valleys of the one or more rings in the portal section have a length that is relatively longer than the bar arms connecting the peaks and the valleys of rings in a distal section of the stent, wherein at least a portion of a ring of said portal section is nested within a ring in said distal section of the stent such that spaces between adjacent said relatively longer bar arms of said ring of said portal section are circumferentially aligned with spaces between adjacent bar arms of said ring of said distal section so that upon stent expansion the portal section will extend into the side branch vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification