Displaceable stent side branch structure
First Claim
1. A balloon expandable stent in an unexpanded configuration comprising:
- a plurality of struts arranged to form a substantially cylindrical expandable framework, the struts defining a plurality of cells; and
a side branch structure comprising;
an outer crown comprising a plurality of outer crown struts arranged to form a closed loop, the outer crown defining a side branch area;
an inner crown comprising a plurality of inner crown struts and inner crown turns arranged to form a closed loop, the inner crown turns comprising inner turns and outer turns, the struts and inner turns defining petals, the inner crown defining an inner side branch cell having a shape different from the shape of any other cell, the inner turns located closer to a centerpoint of the inner side branch cell than the outer turns; and
a plurality of side branch connectors made from the same material as the inner crown, each side branch connector having a first end connected to an outer turn of the inner crown and a second end connected to the outer crown, each side branch connector comprising an inflection point, each side branch connector oriented such that said first end and said second end are not aligned in a side branch radial direction.
1 Assignment
0 Petitions
Accused Products
Abstract
In at least one embodiment, a stent comprises a side branch structure having an inner crown, an outer crown and a plurality of side branch connectors, each side branch connector connecting between the inner crown and the outer crown. Upon expansion of the side branch structure, the inner crown displaces outwardly in a stent radial direction. The entire inner crown moves out of the area defined by the generally cylindrical framework of the main stent body. Upon the outward displacement of the inner crown, the side branch connectors may reorient and also extend out of the area defined by the generally cylindrical framework of the main stent body. The inner crown may further comprise a plurality of outwardly deployable petals. Desirably, side branch expansion forces placed on the inner crown will first cause the inner crown to displace outwardly, then cause the petals to deploy outwardly.
50 Citations
17 Claims
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1. A balloon expandable stent in an unexpanded configuration comprising:
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a plurality of struts arranged to form a substantially cylindrical expandable framework, the struts defining a plurality of cells; and a side branch structure comprising; an outer crown comprising a plurality of outer crown struts arranged to form a closed loop, the outer crown defining a side branch area; an inner crown comprising a plurality of inner crown struts and inner crown turns arranged to form a closed loop, the inner crown turns comprising inner turns and outer turns, the struts and inner turns defining petals, the inner crown defining an inner side branch cell having a shape different from the shape of any other cell, the inner turns located closer to a centerpoint of the inner side branch cell than the outer turns; and a plurality of side branch connectors made from the same material as the inner crown, each side branch connector having a first end connected to an outer turn of the inner crown and a second end connected to the outer crown, each side branch connector comprising an inflection point, each side branch connector oriented such that said first end and said second end are not aligned in a side branch radial direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17)
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12. A balloon expandable stent in an unexpanded configuration comprising:
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a plurality of struts arranged to form a substantially cylindrical expandable framework, the struts defining a plurality of cells; and a side branch structure comprising; an outer crown comprising a plurality of outer crown struts arranged to form a closed loop, the outer crown defining a side branch area; an inner crown comprising a plurality of inner crown struts and inner crown turns arranged to form a closed loop, the inner crown turns comprising inner turns and outer turns, the struts and inner turns defining petals, the inner crown defining an inner side branch cell having a shape different from the shape of any other cell, the inner turns located closer to a centerpoint of the inner side branch cell than the outer turns; and a plurality of side branch connectors made from the same material as the inner crown, each side branch connector having a first end connected to an outer turn of the inner crown and a second end connected to the outer crown, each side branch connector comprising an inflection point; wherein said plurality of side branch connectors comprises a first side branch connector having a length that is different from the length of a second side branch connector.
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Specification