Mesh graft and stent for increased flexibility
First Claim
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1. A method of forming a stent-graft prosthesis comprising the step of:
- forming a first PTFE tubular structure;
positioning a stent over said first PTFE tubular structure, said stent having a tubular configuration formed of a plurality of turns of a helically wound wire, each of said turns including successive upper and lower wave-like peaks;
forming a second PTFE tubular structure over said stent; and
exposing selective ones of said upper and lower wave-like peaks through said second PTFE tubular structure, wherein exposing includes placing a plurality of slits through said second PTFE tubular structure at a location aligned with said selective upper and lower peaks of said stent; and
extending said upper and lower peaks of said stent through said slits.
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Abstract
A composite stent-graft tubular prosthesis includes an inner PTFE tubular structure, an outer PTFE tubular structure positioned about the inner PTFE tubular structure and a diametrically deformable stent interposed between the inner and outer PTFE tubular structures. The interposed stent is formed from an elongate wire helically wound with a plurality of longitudinally spaced turns into an open configuration. Each of the turns includes successive aligned upper and lower wave-like peaks. Selective ones of said upper and lower peaks are exposed exteriorly of the outer PTFE structure to render the composite prosthesis longitudinally flexible.
100 Citations
8 Claims
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1. A method of forming a stent-graft prosthesis comprising the step of:
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forming a first PTFE tubular structure; positioning a stent over said first PTFE tubular structure, said stent having a tubular configuration formed of a plurality of turns of a helically wound wire, each of said turns including successive upper and lower wave-like peaks; forming a second PTFE tubular structure over said stent; and exposing selective ones of said upper and lower wave-like peaks through said second PTFE tubular structure, wherein exposing includes placing a plurality of slits through said second PTFE tubular structure at a location aligned with said selective upper and lower peaks of said stent; and
extending said upper and lower peaks of said stent through said slits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Current AssigneeLifeport Sciences LLC (Acacia Research Corporation)
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Original AssigneeScimed Life Systems Incorporated (Boston Scientific Corporation)
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InventorsGolds, Ellen, Tseng, David, Boatman, Jeff
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Primary Examiner(s)HO, UYEN T
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Application NumberUS10/716,639Publication NumberTime in Patent Office1,203 DaysField of Search623 11- 116, 623/1.22, 623/1.32, 623/1.36US Class Current623/1.13CPC Class CodesA61F 2/07 Stent-graftsA61F 2/89 the wire-like elements comp...A61F 2002/072 Encapsulated stents, e.g. w...A61F 2250/0029 differing in bending or fle...
