CPC A61M 25/0108 (2013.01) [A61F 2/2409 (2013.01); A61F 2/2418 (2013.01); A61F 2/2436 (2013.01); A61F 2250/0098 (2013.01)] | 7 Claims |
1. A prosthetic heart valve for replacing a native valve, comprising:
a stent having a plurality of struts, an inflow end, an outflow end, a collapsed condition and an expanded condition;
a valve assembly disposed within the stent;
a first cuff annularly disposed adjacent the stent; and
a second cuff having a proximal end adjacent the inflow end of the stent and a distal end spaced apart from the proximal end, the second cuff being annularly disposed about the stent radially outward of the first cuff and radially outward of the stent;
wherein the second cuff overlaps with the first cuff along a longitudinal direction of the stent, thereby creating a space between the first cuff and the second cuff configured to receive retrograde blood flow therewithin, and
wherein the second cuff is at least partly radiopaque, the second cuff being formed of a fabric that includes a plurality of first fiber portions extending in a first fiber direction and a plurality of second fiber portions extending in a second fiber direction, each of the first fiber portions is radiolucent and at least one of the second fiber portions is radiopaque,
wherein the plurality of struts includes a plurality of radiopaque struts, the second cuff being less radiopaque than the plurality of radiopaque struts;
wherein a radiopacity of the second cuff is configured, based on a spacing of radiopaque fibers of the second cuff, to be less radiopaque than the plurality of radiopaque struts; and
wherein the proximal end of the second cuff is coupled to the stent by sutures.
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