Bifurcated axially flexible stent
First Claim
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1. A bifurcated stent comprising:
- a first stent portion having first and second ends with an intermediate section therebetween, the stent further having a longitudinal axis and a plurality of longitudinally disposed cells, each of the cells having struts formed in the shape of waves, said waves having a spatial frequency along the length of the stent wherein each cell has an opening therein; and
a second stent portion having first and second ends with an intermediate section therebetween, the stent further having a longitudinal axis and a plurality of longitudinally disposed cells, wherein each cell has an opening therein; and
each of said stent portions capable of expanding from a first respective diameter to a larger second respective diameter; and
wherein said second stent portion is configured in its said first respective diameter to pass through a cell of the first stent portion; and
wherein the spatial frequency of the wave associated with each of the struts in the first stent portion is decreased in a first end region lying proximate to the first end and in a second end region lying proximate to the second end, in comparison to the spatial frequency of the wave in the intermediate section, by a factor of as great as twenty percent.
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Abstract
A stent with axial flexibility, in a preferred embodiment, has a longitudinal axis and comprises a plurality of longitudinally disposed bands, wherein each band defines a generally continuous wave along a line segment parallel to the longitudinal axis. A plurality of links maintains the bands in a tubular structure. In a further embodiment of the invention, each longitudinally disposed band of the stent is connected, at a plurality of periodic locations, by a short circumferential link to an adjacent band. Further, a pair of bifurcated stents is disclosed.
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Citations
4 Claims
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1. A bifurcated stent comprising:
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a first stent portion having first and second ends with an intermediate section therebetween, the stent further having a longitudinal axis and a plurality of longitudinally disposed cells, each of the cells having struts formed in the shape of waves, said waves having a spatial frequency along the length of the stent wherein each cell has an opening therein; and a second stent portion having first and second ends with an intermediate section therebetween, the stent further having a longitudinal axis and a plurality of longitudinally disposed cells, wherein each cell has an opening therein; and each of said stent portions capable of expanding from a first respective diameter to a larger second respective diameter; and wherein said second stent portion is configured in its said first respective diameter to pass through a cell of the first stent portion; and wherein the spatial frequency of the wave associated with each of the struts in the first stent portion is decreased in a first end region lying proximate to the first end and in a second end region lying proximate to the second end, in comparison to the spatial frequency of the wave in the intermediate section, by a factor of as great as twenty percent. - View Dependent Claims (2, 3, 4)
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Specification