Stent seals and method of production
AssigneeBoston Scientific Corporation
InventorsLionel Flaction, Stephane Delaloye, Youssef Biadillah, Arnaud Humair
Life of this patent
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Abstract
Various embodiments of a seal for a stent-valve, and methods of production, are described. In some embodiments, the seal or a skirt comprises a fabric wall portion and a polymeric material fused to the fabric wall portion, the polymeric material having a melting temperature that is lower than that of the fabric wall portion. The fibres of the fabric may remain unmelted at the interface with the polymeric material, the polymeric material being attached to material to the fibres of the fabric wall portion by fusion. The polymeric material may provide a welded joint to another fabric wall portion and/or may reinforce the fabric and/or may occlude pores of the fabric.
Claims20
A stent-valve comprising:
- a stent including a plurality of struts defining a plurality of cells arranged in circumferential rows and a plurality of commissural supports, the stent defining an inflow end and an outflow end, wherein at least two circumferential rows of cells extend upstream of the plurality of commissural supports;
- a plurality of valve leaflets coupled to the stent;
- and
- a seal extending circumferentially around an exterior of the stent and extending radially outward from the stent, the seal positioned adjacent the inflow end of the stent with a portion of the stent extending upstream of the seal.
A stent-valve comprising:
- a stent including a plurality of struts forming a lattice structure defining an inflow end and an outflow end, and a plurality of commissural supports, wherein the plurality of struts forms a plurality of loops defining the outflow end, the plurality of loops extending downstream and radially outward from the plurality of commissural supports, wherein a downstream end of each loop curves radially inward;
- a plurality of valve leaflets coupled to the stent;
- and
- a seal extending circumferentially around an exterior of the stent and extending radially outward from the stent, the seal positioned adjacent the inflow end of the stent with a portion of the stent extending upstream of the seal.
A stent-valve comprising:
- a stent including a plurality of struts defining a plurality of cells arranged in circumferential rows and a plurality of commissural supports, the stent defining an inflow end and an outflow end, wherein at least two circumferential rows of cells extend upstream of the plurality of commissural supports, wherein the plurality of struts forms a plurality of loops defining the outflow end, the plurality of loops extending downstream and radially outward from the plurality of commissural supports, wherein a downstream end of each loop curves radially inward;
- a plurality of valve leaflets coupled to the stent;
- and
- a seal extending circumferentially around an exterior of the stent and extending radially outward from the stent, the seal positioned adjacent the inflow end of the stent with a portion of the stent extending upstream of the seal, wherein the portion of the stent extending upstream of the seal is less than half of a cell.
Dependencies are inferred from the claim text.