Stent features for collapsible prosthetic heart valves
First Claim
Patent Images
1. A prosthetic heart valve, comprising:
- a stent having a proximal end, a distal end, an expanded condition and a collapsed condition, the stent including;
a plurality of proximal cells at the proximal end;
a plurality of support struts, each support strut having a first end connected to one of the proximal cells and a second end;
a plurality of distal cells at the distal end, the distal cells being longitudinally spaced apart from the proximal cells; and
at least one support post connected to a multiplicity of the proximal cells, the support post including a collapsible portion having a first configuration when the stent is in the collapsed condition and a second configuration when the stent is in the expanded condition, the support post having a first length when the collapsible portion is in the first configuration and a second length less than the first length when the collapsible portion is in the second configuration; and
a valve structure connected to the at least one support post.
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Abstract
A prosthetic heart valve includes a stent having an expanded condition and a collapsed condition. The stent includes a plurality of distal cells, a plurality of proximal cells, a plurality of support struts coupling the proximal cells to the distal cells, and at least one support post connected to a plurality of proximal cells. The proximal cells are longitudinally spaced apart from the distal cells. Various strut configurations and connections of the struts to the proximal cells and of the proximal cells to the support post improve stent flexibility and reduce stress in the valve leaflets.
271 Citations
38 Claims
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1. A prosthetic heart valve, comprising:
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a stent having a proximal end, a distal end, an expanded condition and a collapsed condition, the stent including; a plurality of proximal cells at the proximal end; a plurality of support struts, each support strut having a first end connected to one of the proximal cells and a second end; a plurality of distal cells at the distal end, the distal cells being longitudinally spaced apart from the proximal cells; and at least one support post connected to a multiplicity of the proximal cells, the support post including a collapsible portion having a first configuration when the stent is in the collapsed condition and a second configuration when the stent is in the expanded condition, the support post having a first length when the collapsible portion is in the first configuration and a second length less than the first length when the collapsible portion is in the second configuration; and a valve structure connected to the at least one support post. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A prosthetic heart valve, comprising:
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a stent having a proximal end, a distal end, an expanded condition and a collapsed condition, the stent including; a plurality of proximal cells at the proximal end; a plurality of support struts, each support strut having a first end connected to one of the proximal cells and a second end; a plurality of distal cells at the distal end, the distal cells being longitudinally spaced apart from the proximal cells; a spacer interconnecting two adjacent distal cells, the spacer being connected only to the two adjacent distal cells; and at least one support post connected to a multiplicity of the proximal cells; and a valve structure connected to the at least one support post.
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32. A prosthetic heart valve, comprising:
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a stent having a proximal end, a distal end, an expanded condition and a collapsed condition, the stent including; a plurality of cells; at least one support post connected to a multiplicity of the cells; and a reinforcement secured to the at least one support post, the reinforcement including first and second secondary posts secured to the at least one support post; and a valve structure connected to the at least one support post and including at least one leaflet, the first and second secondary posts being arranged to sandwich the at least one leaflet therebetween. - View Dependent Claims (33, 34, 35, 36, 37)
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38. A prosthetic heart valve, comprising:
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a stent having a proximal end, a distal end, an expanded condition and a collapsed condition, the stent including; a plurality of cells; at least one support post connected to a multiplicity of the cells; and a reinforcement secured to the at least one support post, the reinforcement being formed from a pliable material and including a cuff attached to the cells; and a valve structure connected to the at least one support post and including at least one leaflet, the reinforcement being adapted to secure the at least one leaflet to the stent.
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Specification