Prosthetic heart valve with paravalvular leak mitigation features
First Claim
1. A prosthetic heart valve for replacing a native valve, comprising:
- a stent having an inflow end, an outflow end, a plurality of cells formed by cell struts, a collapsed condition and an expanded condition;
a valve assembly disposed within the stent;
a first cuff annularly disposed adjacent the stent;
a second cuff having a proximal edge facing toward the inflow end of the stent and a distal edge facing toward the outflow end of the stent, the second cuff being annularly disposed about the stent radially outward of the first cuff and radially outward of the stent; and
a plurality of fingers each having a first end coupled to a corresponding cell of the stent and a free end remote from the first end, the free end extending into a space formed by the corresponding cell, the distal edge of the second cuff being coupled to the free ends of the fingers at spaced locations around a circumference of the stent, the free ends of the fingers being spaced radially outward of the corresponding cell in the expanded condition of the stent to position the distal edge of the second cuff radially outward of the corresponding cells of the stent at the spaced locations.
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Accused Products
Abstract
A prosthetic heart valve includes a collapsible stent and a valve assembly disposed within the stent. A first cuff is disposed adjacent the stent. A second cuff having a distal edge facing the outflow end of the stent is disposed about the stent radially outward of the first cuff and the stent. The stent may include a plurality of fingers each having a first end coupled to a corresponding cell of the stent and a free end adapted to extend radially outward of the corresponding cell. The distal edge of the second cuff may be coupled to the fingers at spaced locations around the circumference of the stent to position the distal edge radially outward from the corresponding cells at the spaced locations. Various stent struts may be tapered to reduce the stent circumference in the collapsed condition, and to improve the fatigue resistance and/or bendability of the stent.
265 Citations
21 Claims
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1. A prosthetic heart valve for replacing a native valve, comprising:
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a stent having an inflow end, an outflow end, a plurality of cells formed by cell struts, a collapsed condition and an expanded condition; a valve assembly disposed within the stent; a first cuff annularly disposed adjacent the stent; a second cuff having a proximal edge facing toward the inflow end of the stent and a distal edge facing toward the outflow end of the stent, the second cuff being annularly disposed about the stent radially outward of the first cuff and radially outward of the stent; and a plurality of fingers each having a first end coupled to a corresponding cell of the stent and a free end remote from the first end, the free end extending into a space formed by the corresponding cell, the distal edge of the second cuff being coupled to the free ends of the fingers at spaced locations around a circumference of the stent, the free ends of the fingers being spaced radially outward of the corresponding cell in the expanded condition of the stent to position the distal edge of the second cuff radially outward of the corresponding cells of the stent at the spaced locations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification