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 having a proximal end, a distal end and a luminal surface defining a lumen;
a cuff coupled to the stent at a position spaced from the proximal end, the cuff having a first configuration and a second configuration; and
a plurality of elongated members coupled to the stent at positions spaced from the proximal end of the stent, the members being configured to arrange the cuff between the first and second configurations, wherein the cuff when in the first configuration is disposed entirely within the lumen to provide a low profile prosthetic heart valve;
wherein the members remain coupled to the stent and the cuff when in the second configuration after replacement of the native valve; and
wherein a first portion of the cuff when arranged in the second configuration is disposed within the lumen of the stent and a second portion of the cuff when arranged in the second configuration circumscribes 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.
133 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 having a proximal end, a distal end and a luminal surface defining a lumen; a cuff coupled to the stent at a position spaced from the proximal end, the cuff having a first configuration and a second configuration; and a plurality of elongated members coupled to the stent at positions spaced from the proximal end of the stent, the members being configured to arrange the cuff between the first and second configurations, wherein the cuff when in the first configuration is disposed entirely within the lumen to provide a low profile prosthetic heart valve;
wherein the members remain coupled to the stent and the cuff when in the second configuration after replacement of the native valve; and
wherein a first portion of the cuff when arranged in the second configuration is disposed within the lumen of the stent and a second portion of the cuff when arranged in the second configuration circumscribes 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, the stent assembly including a stent having a proximal end, a distal end, and a luminal surface defining a lumen, a cuff coupled to the stent at a position spaced from the proximal end, and a plurality of elongated members coupled to the stent at positions spaced from the proximal end of the stent, the method comprising:
arranging the cuff in a first configuration positioned entirely within the lumen to provide a low profile prosthetic heart valve wherein a first portion of the cuff when arranged in a second configuration is disposed within the lumen of the stent and a second portion of the cuff when arranged in the second configuration circumscribes the stent overlying an abluminal surface thereof forming a cuff seal, and the members remain coupled to the stent and the cuff when the second portion of the cuff is arranged in the second configuration after replacement of the native valve. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
Specification