Stent assembly for use in prosthetic heart valves
First Claim
1. A stent assembly for a prosthetic heart valve for replacing a native valve, comprising:
- a stent having a luminal surface and an abluminal surface extending between a distal end and a proximal end thereof;
a cuff coupled to the stent having a first orientation and a second orientation; and
,a plurality of members having a distal end coupled to the stent and a proximal end coupled to the cuff, the plurality of members having a tensioned state when the cuff is arranged in the first orientation and a relaxed state when the cuff is arranged in the second orientation, the plurality of members have a first axial length dimension between a proximal portion and a distal portion thereof when in the tensioned state and a second axial length dimension between the proximal portion and the distal portion thereof when in the relaxed state wherein the first length dimension is greater than the second length dimension.
1 Assignment
0 Petitions
Accused Products
Abstract
A prosthetic heart valve having a cuff attached to a stent provides a seal for preventing paravalvular leakage. The cuff may be constructed from known sealing materials to fill in and around paravalvular leakage gaps, while continuously collapsing down into a low profile volume within the stent. The cuff is coupled circumferentially about the stent by members which may be in the nature of dimension and/or shape memory material having a tensioned and relaxed state. The members may be in the form of elongated elastic members or coiled members. When in the tensioned state, the cuff is located within the stent volume to provide a low profile prosthetic heart valve. Upon relaxing of the members, the cuff is pulled over the abluminal surface of the stent to form a cuff seal circumscribing the stent for preventing paravalvular leakage.
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Citations
31 Claims
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1. A stent assembly for a prosthetic heart valve for replacing a native valve, comprising:
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a stent having a luminal surface and an abluminal surface extending between a distal end and a proximal end thereof; a cuff coupled to the stent having a first orientation and a second orientation; and
,a plurality of members having a distal end coupled to the stent and a proximal end coupled to the cuff, the plurality of members having a tensioned state when the cuff is arranged in the first orientation and a relaxed state when the cuff is arranged in the second orientation, the plurality of members have a first axial length dimension between a proximal portion and a distal portion thereof when in the tensioned state and a second axial length dimension between the proximal portion and the distal portion thereof when in the relaxed state wherein the first length dimension is greater than the second length dimension. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A stent assembly for a prosthetic heart valve for replacing a native valve, comprising:
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a stent having a proximal end and an abluminal surface; and a cuff coupled to the stent by a plurality of members having a relaxed state and a tensioned state for orienting at least a portion of the cuff at least partially disposed on the abluminal surface when the plurality of members are in a relaxed state, the plurality of members have a first axial length dimension between a proximal portion and a distal portion thereof when in the tensioned state and a second axial length dimension between the proximal portion and distal portion thereof when in the relaxed state, wherein the first axial length dimension is greater than the second axial length dimension. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A stent assembly for use in a prosthetic heart valve for replacing a native valve, comprising:
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a stent; a cuff coupled to the stent having a first orientation and a second orientation; and a plurality of members coupled between the stent and cuff having a tensioned state and a relaxed state, the members configured to arrange the cuff between the first and second orientations, wherein the members remain coupled to the stent and cuff after replacement of the native valve, the plurality of members have a first axial length dimension between a proximal portion and a distal portion thereof when in the tensioned state and a second axial length dimension between the proximal portion and the distal portion thereof when in the relaxed state, wherein the first length dimension is greater than the second length dimension. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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26. A prosthetic heart valve for replacing a native valve, comprising:
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a stent configured to have a collapsed condition and an expanded condition, the stent having a luminal surface and an abluminal surface extending between a distal end and a proximal end thereof; a cuff having a portion at least partially disposed on the luminal surface of the stent, wherein at least a portion of the cuff having a first orientation extending outwardly of the proximal end of the stent or at least partially disposed on the abluminal surface of the stent, and a second orientation with a portion of the cuff at least partially disposed on the abluminal surface of the stent; a valve assembly disposed within the stent, the valve assembly including a plurality of leaflets; and a plurality of elongated members having a distal end coupled to the stent and a proximal end coupled to the cuff at circumferentially spaced apart locations, the plurality of members having a tensioned state when the cuff is arranged in the first orientation and a relaxed state when the cuff is arranged in the second orientation, the plurality of members have a first axial length dimension between a proximal portion and a distal portion thereof when in the tensioned state and a second axial length dimension between the proximal portion and distal portion thereof when in the relaxed state, wherein the first axial length dimension is greater than the second axial length dimension. - View Dependent Claims (27, 28, 29, 30, 31)
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Specification