STENT ASSEMBLY FOR USE IN PROSTHETIC HEART VALVES
First Claim
1. A stent assembly for use in a prosthetic heart valve for replacing a native valve, comprising:
- a stent including a luminal surface defining a lumen;
a cuff coupled to the stent having a first orientation and a second orientation; and
a plurality of elongated members coupled between the stent and cuff, the members configured to arrange the cuff between the first and second orientations, wherein the cuff when in the first orientation is arranged within the lumen to provide a low profile prosthetic heart valve;
wherein the members remain coupled to the stent and cuff when in the second orientation after replacement of the native valve; and
wherein the cuff when arranged in the first orientation is disposed entirely within the lumen, and wherein at least a portion of the cuff when arranged in the second orientation is disposed circumscribing the stent overlying an abluminal surface thereof forming a cuff seal.
1 Assignment
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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
18 Claims
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1. A stent assembly for use in a prosthetic heart valve for replacing a native valve, comprising:
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a stent including a luminal surface defining a lumen; a cuff coupled to the stent having a first orientation and a second orientation; and a plurality of elongated members coupled between the stent and cuff, the members configured to arrange the cuff between the first and second orientations, wherein the cuff when in the first orientation is arranged within the lumen to provide a low profile prosthetic heart valve;
wherein the members remain coupled to the stent and cuff when in the second orientation after replacement of the native valve; and
wherein the cuff when arranged in the first orientation is disposed entirely within the lumen, and wherein at least a portion of the cuff when arranged in the second orientation is disposed circumscribing the stent overlying an abluminal surface thereof forming a cuff seal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for preparing a stent assembly for use in a prosthetic heart valve for replacing a native valve, wherein the stent assembly includes a stent having a luminal surface defining a lumen, a cuff coupled to the stent, and a plurality of elongated members coupled between the stent and the cuff, the method comprising:
arranging the cuff in a first orientation positioned within the lumen to provide a low profile prosthetic heart valve;
wherein the members remain coupled to the stent and cuff when at least a portion of the cuff is arranged in a second orientation after replacement of the native valve; and
wherein the cuff when arranged in the first orientation is disposed entirely within the lumen, and wherein the at least a portion of the cuff when arranged in the second orientation is disposed circumscribing the stent overlying an abluminal surface thereof forming a cuff seal.- View Dependent Claims (11, 12, 13, 15, 16, 17, 18)
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14. The method of claim 14, wherein the hollow tube defines a lumen, and further including an insert disposed within the lumen comprising at least one of a filler material or an elongated coiled member.
Specification