Methods for improved prosthetic heart valve with leaflet shelving
First Claim
Patent Images
1. A prosthetic valve comprising:
- a support structure having a longitudinal axis and defining a leaflet attachment zone between a pair of adjacent commissure posts;
a leaflet coupled to and extending from the leaflet attachment zone, the leaflet having a free edge at one end of the leaflet and a base at another end of the leaflet opposite the free edge, the base of the leaflet being coupled to the support structure to define a linear base segment such that the leaflet is configured to bend from the base toward the free edge about the linear base segment during opening-closing cycles associated with blood pressure differentials across the prosthetic valve, the linear base segment of the leaflet having a first side, a second side opposite the first side, and a center between the first side and the second side of the linear base segment, each of the first side and the second side of the linear base segment defining a first radial distance from the longitudinal axis of the support structure and the center of the linear base segment defining a second radial distance from the longitudinal axis of the support structure that is less than the first radial distance.
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Abstract
Described embodiments are directed toward prosthetic valve leaflets of particular configurations that control bending character. In embodiments provided herein, valve leaflets are operable to bend along a base of the valve leaflets.
282 Citations
19 Claims
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1. A prosthetic valve comprising:
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a support structure having a longitudinal axis and defining a leaflet attachment zone between a pair of adjacent commissure posts; a leaflet coupled to and extending from the leaflet attachment zone, the leaflet having a free edge at one end of the leaflet and a base at another end of the leaflet opposite the free edge, the base of the leaflet being coupled to the support structure to define a linear base segment such that the leaflet is configured to bend from the base toward the free edge about the linear base segment during opening-closing cycles associated with blood pressure differentials across the prosthetic valve, the linear base segment of the leaflet having a first side, a second side opposite the first side, and a center between the first side and the second side of the linear base segment, each of the first side and the second side of the linear base segment defining a first radial distance from the longitudinal axis of the support structure and the center of the linear base segment defining a second radial distance from the longitudinal axis of the support structure that is less than the first radial distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A prosthetic valve comprising:
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a support structure including a plurality of commissure posts, defining a plurality of leaflet attachment zones between the commissure posts, and having a longitudinal axis and a plurality of chords defined between adjacent ones of the commissure posts; and a plurality of leaflets, each of the plurality of leaflets extending from one of the leaflet attachment zones and having a free edge at one end and a base at an opposite end from the free edge that is coupled to the support structure along a linear base segment about which a corresponding one of the plurality of leaflets is configured to bend from the linear base segment toward the free edge during opening and closing associated with blood pressure differentials across the prosthetic valve, each of the leaflets further having a planar zone including a planar zone base that is coincident with one of the linear base segments, each of the linear base segments having a length that is less than a length of the plurality of chords.
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19. A prosthetic valve comprising:
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a leaflet frame having a first end and a second end opposite the first end, the leaflet frame including a plurality of commissure posts and a plurality of leaflet windows each having a top, a bottom opposite the top, a first side, and a second side; a plurality of leaflets coupled to two of the commissure posts of the leaflet frame, each leaflet extending from one of the plurality of leaflet windows and having a base at one end that is truncated and substantially flat in a plane that is transverse to a longitudinal axis of the prosthetic valve, each of the plurality of leaflets having a free end at an opposite end to a respective one of the bases, each of the bases being formed by a fold region defining a line segment that is axially offset from the second end of the leaflet frame and the base being spaced apart from the bottom of one of the leaflet windows in an axial direction such that each of the plurality of leaflet is configured to bend from a corresponding one of the line segments toward a corresponding one of the free edges during opening and closing associated with blood pressure differentials across the prosthetic valve.
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Specification