Expandable medical implant and percutaneous delivery
Assignee3F Therapeutics, Inc.
InventorsRodolfo C Quijano, Hosheng Tu
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Abstract
An expandable annular ring for implantation in a valvular annulus and its percutaneous use thereof comprises a plurality of stenting elements made of a first shape-memory material having a first shape-transition temperature, wherein the first shape-memory material expands to a preshape when the first shape-memory material is heated to above the first shape-transition temperature; and a plurality of anchoring elements made of a second shape-memory material having a second shape-transition temperature that is higher than the first shape-transition temperature, wherein the second shape-memory material expands to the second preshape when the second shape-memory material is heated to above the second shape-transition temperature.
Claims20
An expandable ring with a uni-flow mechanism for implantation in a valvular annulus of a patient comprising a plurality of stenting elements evenly spaced along said annular ring, wherein said stenting elements are made of a shape-memory material, the shape-memory material having a preshape and a shape-transition temperature, wherein the shape-memory material expands to its preshape so as to expand the annular ring when said shape-memory material is heated to above the shape-transition temperature;
- said ring having a plurality of circular members.
An expandable ring for implantation in a valvular annulus comprising:
- a plurality of stenting elements made of a first shape-memory material having a first preshape and a first shape-transition temperature, wherein the first shape-memory material expands to the first preshape when said first shape-memory material is heated to above the first shape-transition temperature;
- and a plurality of anchoring elements made of a second shape-memory material having a second preshape and a second shape-transition temperature that is higher than the first shape-transition temperature, wherein the second shape-memory material expands to the second preshape when said second shape-memory material is heated to above the second shape-transition temperature.
A method for implanting an expandable ring having a plurality of stenting elements made of a first shape-memory material with a first shape-transition temperature and a plurality of anchoring elements made of a second shape-memory material with a second shape-transition temperature that is higher than the first shape-transition temperature in a valvular annulus of a patient, the method comprising steps of:
- (a) delivering said ring to the valvular annulus;
- (b) expanding said ring to intimately contact an inner wall of the valvular annulus by heating the first shape-memory material above the first shape-transition temperature;
- and (c) deploying the anchoring elements to penetrate into a surrounding annulus tissue by heating the second shape-memory material above the second shape-transition temperature.
Dependencies are inferred from the claim text.