Rolled minimally invasive heart valves
First Claim
1. A prosthetic heart valve suitable for minimally invasive delivery to annulus of a patient'"'"'s heart valve, comprising:
- a spirally-wound sheet-like stent body defining a flow axis and an inflow end and an outflow end spaced along the axis; and
a plurality of separate biocompatible membranes attached to the stent body along curvilinear cusps and commissures on the stent body that are generally axially extending toward the outflow end, with a free edge of each membrane extending between the commissures.
1 Assignment
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Accused Products
Abstract
Expandable heart valves for minimally invasive valve replacement surgeries are disclosed. The valves are rolled into a first, contracted configuration for minimally invasive delivery and then unrolled or unfurled at the implantation site. One- and two-piece stents may be used in conjunction with a plurality of flexible leaflet-forming membranes. The one-piece stents may include an annulus anchoring section, a sinus section with the membranes attached over sinus apertures, and a rigid outflow section. The two-piece stent may include a primary stent to provide a tubular base at the annulus, and a secondary stent having the membranes that couples within the primary stent. Lockout tabs to secure the stents in their expanded shapes are provided. Also, alignment structure may be provided to ensure concentric unfurling. Anchoring barbs at the stent edges or in the stent body secure the valve within the annulus. Methods of implantation are also provided.
588 Citations
33 Claims
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1. A prosthetic heart valve suitable for minimally invasive delivery to annulus of a patient'"'"'s heart valve, comprising:
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a spirally-wound sheet-like stent body defining a flow axis and an inflow end and an outflow end spaced along the axis; and a plurality of separate biocompatible membranes attached to the stent body along curvilinear cusps and commissures on the stent body that are generally axially extending toward the outflow end, with a free edge of each membrane extending between the commissures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 33)
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17. A prosthetic heart valve suitable for minimally invasive delivery to an annulus of a patient s heart valve, comprising:
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a generally sheet-like stent body having a first, contracted configuration in which the stent body is spirally-wound about an axis such that at least one winding of the stent body overlaps another winding, and a second, expanded configuration in which the stent body is substantially unwound and at least partly forms a tube centered about the axis and sized to engage the patient'"'"'s heart valve annulus; and a plurality of flexible, biological tissue membranes attached to the stent body to form heart valve leaflets in the second configuration, an outer edge of each leaflet being attached to the stent body along a curvilinear path defined by generally axially-extending commissures on either side of a curvilinear cusp, the commissures of each leaflet converging with commissures of adjacent leaflets, each leaflet having a free edge remaining unattached to permit the leaflets to billow inward upon blood flow in one direction along the axis such that the free edges of adjacent leaflets coapt with each other and occlude blood flow in the one direction. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification