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US 6,626,939 B1Granted
Stent-graft with bioabsorbable structural support
AssigneeBoston Scientific Scimed, Inc.
InventorsDiane K. Burnside, Jonathan S. Stinson, Paul F. Chouinard
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Abstract
The invention relates to a stent-graft with a bioabsorbable structure and a permanent graft for luminal support and treatment of arterial fistulas, occlusive disease, and aneurysms. The bioabsorbable structure is formed from braided filaments of materials such as PLA, PLLA, PDLA, and PGA and the graft is formed from materials such as PET, ePTFE, PCU or PU.
Claims31
A stent-graft comprising:
- a tubular annealed structure formed of a plurality of filaments, each filament comprising bioabsorbable material and having an average diameter in the range of about 0.15 mm to about 0.6 mm;
- wherein said filaments include a first set of the filaments wound helically about an axis of the tubular structure and having a first common direction of winding, and a second set of the filaments wound helically about the axis and having a second common direction of winding, whereby the filaments of the second set cross the filaments of the first set at an axially directed angle;
- and
- wherein the filaments have tensile strengths and tensile moduli whereby the tubular structure is radially compressible and radially self-expandable;
- and
- a compliant graft cooperating with at least a portion of the tubular structure to form a stent-graft adapted to be disposed in a body lumen.
3 more elements
Dependencies are inferred from the claim text.