Prosthetic heart valve and endoprosthesis comprising a prosthetic heart valve and a stent
First Claim
1. An endoprosthesis comprising:
- a stent; and
a prosthetic heart valve coupled to the stent, the prosthetic heart valve comprising;
(a) a tissue assembly comprising at least two separate, monolithic pieces coupled together, each piece comprising a natural tissue material or a synthetic material, wherein each piece includes;
(i) two sleeves each having a free end;
(ii) a leaflet having a first opened position for opening the heart chamber and a second closed position for closing the heart chamber, the leaflet being between the two sleeves and able to move between the first and second positions in response to a blood flow through the heart;
(iii) a skirt portion proximal to the leaflet and the sleeves, wherein the skirt portion mounts the prosthetic heart valve to the stent; and
(iv) a bendable transition area forming a junction between the leaflet and the skirt portion, the bendable transition area being essentially U-shaped; and
(b) at least one reinforcement element coupled to the tissue assembly and attached to a commissure portion of the stent;
wherein the at least one reinforcement element is attached to two adjacent monolithic pieces of the tissue assembly along the free end of a sleeve of each adjacent monolithic piece, and wherein the at least one reinforcement element covers an entire outermost surface of the sleeves to prevent the sleeves from contacting the commissure portion of the stent; and
wherein a proximal-most end of the prosthetic heart valve has a zigzag shape.
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Accused Products
Abstract
The invention relates to a prosthetic heart valve (100) for an endoprosthesis (1) used in the treatment of a stenotic cardiac valve and/or a cardiac valve insufficiency. The prosthetic heart valve (100) comprises of a plurality of leaflets (102), which consist of a natural and/or synthetic material and have a first opened position for opening the heart chamber and a second closed position for closing the heart chamber, the leaflets (102) being able to switch between their first and second position in response to the blood flow through the heart. In addition, the prosthetic heart valve (100) comprises a leaflet support portion (103), consisting of biological and/or synthetic material for mounting of the prosthetic heart valve (100) to a stent (10), and a bendable transition area (104) which forms a junction between the leaflets (102) and the leaflet support portion (103), the transition area (104) progressing essentially in a U-shaped manner similar to a cusp shape of a natural aortic or pulmonary heart valve for reducing tissue stresses during opening and closing motion of the leaflets (102). The invention further relates to an endoprosthesis (1) comprising a prosthetic heart valve (100) and a stent (10).
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Citations
20 Claims
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1. An endoprosthesis comprising:
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a stent; and a prosthetic heart valve coupled to the stent, the prosthetic heart valve comprising; (a) a tissue assembly comprising at least two separate, monolithic pieces coupled together, each piece comprising a natural tissue material or a synthetic material, wherein each piece includes; (i) two sleeves each having a free end; (ii) a leaflet having a first opened position for opening the heart chamber and a second closed position for closing the heart chamber, the leaflet being between the two sleeves and able to move between the first and second positions in response to a blood flow through the heart; (iii) a skirt portion proximal to the leaflet and the sleeves, wherein the skirt portion mounts the prosthetic heart valve to the stent; and (iv) a bendable transition area forming a junction between the leaflet and the skirt portion, the bendable transition area being essentially U-shaped; and (b) at least one reinforcement element coupled to the tissue assembly and attached to a commissure portion of the stent; wherein the at least one reinforcement element is attached to two adjacent monolithic pieces of the tissue assembly along the free end of a sleeve of each adjacent monolithic piece, and wherein the at least one reinforcement element covers an entire outermost surface of the sleeves to prevent the sleeves from contacting the commissure portion of the stent; and wherein a proximal-most end of the prosthetic heart valve has a zigzag shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An endoprosthesis comprising:
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a stent including a plurality of retaining arches, each retaining arch having a first arm and a second arm joined at an apex, the first arm and the second arm being proximal to a commissure region of the stent, wherein a length of each of the first arm and the second arm defines a plurality of notches; and a prosthetic heart valve fixedly attached to the stent, the prosthetic heart valve comprising; (a) a tissue assembly comprising at least two separate, monolithic pieces coupled together, each piece comprising a natural tissue material or a synthetic tissue material and including a leaflet, a skirt portion, and two sleeves; and (b) a plurality of reinforcement elements, each reinforcement element coupled to the sleeves of adjacent monolithic pieces of the tissue assembly; wherein the prosthetic heart valve is attached to the commissure regions of the stent via sutures, the reinforcement elements being disposed between the stent and the tissue assembly of the prosthetic heart valve at the commissure regions; and wherein the prosthetic heart valve is attached to the retaining arches of the stent at the plurality of notches via sutures. - View Dependent Claims (19)
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20. An endoprosthesis comprising:
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a stent including three retaining arches, each retaining arch including a first arm and a second arm joined at an apex; and a prosthetic heart valve fixedly attached to the stent, the prosthetic heart valve comprising; (a) a tissue assembly comprising three separate, monolithic pieces coupled together, each piece comprising a natural tissue material or a synthetic tissue material, wherein each piece includes; (i) two sleeves each having a free end; (ii) a leaflet between the two sleeves; (iii) a skirt portion proximal to the leaflet and the sleeves; and (iv) a bendable transition area between the leaflet and the skirt portion; and (b) three reinforcement elements coupled to the tissue assembly, each reinforcement element having a shape that corresponds to a combined shape of the sleeves of two adjacent monolithic pieces; wherein the bendable transition area of each monolithic piece is attached to one of the retaining arches of the stent at a plurality of notches along a length of each of the first arm and the second arm of the retaining arch.
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Specification