Polymeric stent
First Claim
1. An endoprosthesis comprising:
- a tubular body formed of a polymer, the tubular body including an end segment and an intermediate segment adjoining the end segment, the end segment including a circumferential series of closed cells having a first W-shape, the intermediate segment including a circumferential series of closed cells having second W-shape, there being linear link struts at opposite ends of the individual first and second W-shapes, the linear link struts of the first W-shape being longer than the linear link struts of the second W-shape,wherein each of the first and second W-shapes has a perimeter that includesa first series of four ring struts, followed by and joined directly to one of the linear link struts, followed by and joined directly to a second series of four ring struts, and followed by and joined directly to another one of the linear link struts.
1 Assignment
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Accused Products
Abstract
A strut pattern of an endoprosthesis includes a plurality of W-shape cells that define a tubular body, the W-shaped cells at the opposite ends of the tubular body have a modified configuration that is different than the W-shaped cells at the middle portion of the tubular body. At the distal end of the tubular body, the W-shaped cells have crests with axial positions that are axially spaced apart, and have troughs with circumferential positions that are spaced apart. At the intermediate and distal end of the tubular body, the W-shaped cells crests with axial positions that coincide and have troughs with circumferential positions that coincide. The strut pattern is cut from a tubular precursor construct made of PLLA that has been radially expanded and axially extended by blow molding.
50 Citations
20 Claims
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1. An endoprosthesis comprising:
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a tubular body formed of a polymer, the tubular body including an end segment and an intermediate segment adjoining the end segment, the end segment including a circumferential series of closed cells having a first W-shape, the intermediate segment including a circumferential series of closed cells having second W-shape, there being linear link struts at opposite ends of the individual first and second W-shapes, the linear link struts of the first W-shape being longer than the linear link struts of the second W-shape, wherein each of the first and second W-shapes has a perimeter that includes a first series of four ring struts, followed by and joined directly to one of the linear link struts, followed by and joined directly to a second series of four ring struts, and followed by and joined directly to another one of the linear link struts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 19)
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9. An endoprosthesis comprising:
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ring structures made of polymer material, the ring structures forming a tubular body having a distal end, a proximal end, and an intermediate segment between the distal and proximal ends, the ring structures connected to each other by linear link struts that are oriented axially, each ring structure formed by a series of ring struts, the ring structures and link struts forming W-shape closed cells, the W-shape closed cells including nominal cells within the intermediate segment of the tubular body and end cells at the distal and proximal ends of the tubular body, the linear link struts of the end cells being axially longer than the linear link struts of the nominal cells, wherein each of the nominal cells and the end cells has a perimeter that includes a first series of four of the ring struts, followed by and joined directly to one of the linear link struts, followed by and joined directly to a second series of four of the ring struts, and followed by and joined directly to another one of the linear link struts. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 20)
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Specification