Two-stage collapsible/expandable prosthetic heart valves and anchoring systems
First Claim
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1. Apparatus for use as a prosthetic heart valve, comprising:
- an annular anchoring structure adapted for (1) delivery into a patient in a circumferentially collapsed condition, and (2) circumferential re-expansion and anchoring engagement with tissue of the patient when at an implant site in the patient, the anchoring structure including a plurality of collapsible cells having a perimeter and an open center;
an annular valve support structure separate from the annular anchoring structure and adapted for (1) delivery into the patient in a circumferentially collapsed condition separate from the anchoring structure, and (2) circumferential re-expansion and interengagement with the anchoring structure in an assembled position, the valve support structure including a plurality of projections, each projection extending radially outwardly into a respective one of the cells in the assembled position; and
a flexible leaflet structure disposed inside the valve support structure.
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Abstract
Prosthetic heart valve apparatus is adapted for delivery into a patient in a circumferentially collapsed condition, followed by circumferential re-expansion at the implant site in the patient. The apparatus includes an annular anchoring structure that can be implanted in the patient first. The apparatus further includes an annular valve support structure, which supports a flexible leaflet structure of the valve. The support and leaflet structures are initially separate from the anchoring structure, but they can be implanted in the patient by interengagement of the support structure with the already-implanted anchoring structure.
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Citations
21 Claims
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1. Apparatus for use as a prosthetic heart valve, comprising:
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an annular anchoring structure adapted for (1) delivery into a patient in a circumferentially collapsed condition, and (2) circumferential re-expansion and anchoring engagement with tissue of the patient when at an implant site in the patient, the anchoring structure including a plurality of collapsible cells having a perimeter and an open center; an annular valve support structure separate from the annular anchoring structure and adapted for (1) delivery into the patient in a circumferentially collapsed condition separate from the anchoring structure, and (2) circumferential re-expansion and interengagement with the anchoring structure in an assembled position, the valve support structure including a plurality of projections, each projection extending radially outwardly into a respective one of the cells in the assembled position; and a flexible leaflet structure disposed inside the valve support structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of implanting a prosthetic heart valve in a patient, comprising:
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implanting an annular anchoring structure in the patient by delivering the anchoring structure into the patient in a circumferentially collapsed condition and then circumferentially expanding the anchoring structure while in the patient to implant the anchoring structure at an implant site in the patient, the anchoring structure including a plurality of collapsible cells having a perimeter and an open center; delivering an annular valve support structure into the patient in a circumferentially collapsed condition and separate from the anchoring structure; circumferentially expanding the valve support structure while in the patient, the expanded valve support structure including a plurality of projections extending radially outwardly; and interengaging each of the projections with the open center of a respective one of the cells to interlock the expanded valve support structure with the implanted anchoring structure. - View Dependent Claims (20, 21)
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Specification