Thrombus management and structural compliance features for prosthetic heart valves
First Claim
1. A prosthetic heart valve comprising:
- an outer frame assembly having an atrium portion, a ventricle portion, and an annulus portion between the atrium portion and the ventricle portion,the outer frame assembly having an hourglass shape and including shape memory material such that the outer frame assembly reverts to a memory shape in the absence of applied forces; and
an inner valve assembly including an inner frame having an atrium end and a ventricle end,the inner valve assembly coupled to the outer frame assembly by a connection between the ventricle end of the inner frame and the ventricle portion of the outer frame assembly,the inner frame assembly extending from the connection towards the atrium portion of the outer frame assembly,the inner frame assembly and the outer frame assembly diverging from each other in a direction from the connection towards the atrium portion of the outer frame assembly,the annulus portion of the outer frame assembly being spaced radially from the inner valve assembly and radially inwardly deflectable towards the inner valve assembly to accommodate in the annulus portion a natural valve annulus having a perimeter smaller than a minimum perimeter of the annulus portion when the outer frame assembly has the memory shape.
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Accused Products
Abstract
A prosthetic heart valve can include an outer support assembly, an inner valve assembly, which define between them an annular space, and a pocket closure that bounds the annular space to form a pocket in which thrombus can be formed and retained. Alternatively, or additionally, the outer support assembly and the inner valve assembly can be coupled at the ventricle ends of the outer support assembly and the inner valve assembly, with the outer support assembly being relatively more compliant in hoop compression in a central, annulus portion than at the ventricle end, so that the prosthetic valve can seat securely in the annulus while imposing minimal loads on the inner valve assembly that could degrade the performance of the valve leaflets.
777 Citations
13 Claims
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1. A prosthetic heart valve comprising:
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an outer frame assembly having an atrium portion, a ventricle portion, and an annulus portion between the atrium portion and the ventricle portion, the outer frame assembly having an hourglass shape and including shape memory material such that the outer frame assembly reverts to a memory shape in the absence of applied forces; and an inner valve assembly including an inner frame having an atrium end and a ventricle end, the inner valve assembly coupled to the outer frame assembly by a connection between the ventricle end of the inner frame and the ventricle portion of the outer frame assembly, the inner frame assembly extending from the connection towards the atrium portion of the outer frame assembly, the inner frame assembly and the outer frame assembly diverging from each other in a direction from the connection towards the atrium portion of the outer frame assembly, the annulus portion of the outer frame assembly being spaced radially from the inner valve assembly and radially inwardly deflectable towards the inner valve assembly to accommodate in the annulus portion a natural valve annulus having a perimeter smaller than a minimum perimeter of the annulus portion when the outer frame assembly has the memory shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A prosthetic heart valve comprising:
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an outer frame assembly having an atrium portion, a ventricle portion, and an annulus portion between the atrium portion and the ventricle portion, the outer frame assembly including shape memory material such that the outer frame assembly reverts to a memory shape in the absence of applied forces, the annulus portion having an hourglass shape with a minimum perimeter disposed between a larger perimeter near the atrium portion and a larger perimeter near the ventricle portion when the outer frame assembly has the memory shape; and an inner valve assembly including an inner frame having an atrium end and a ventricle end, the inner valve assembly coupled to the outer frame assembly by a connection between the ventricle end of the inner frame and the ventricle portion of the outer frame assembly, the inner frame assembly extending from the connection towards the atrium portion of the outer frame assembly, the inner frame assembly and the outer frame assembly diverging from each other in a direction from the connection towards the atrium portion of the outer frame assembly, the annulus portion of the outer frame assembly being spaced radially from the inner valve assembly and radially inwardly deflectable towards the inner valve assembly to accommodate in the annulus portion a natural valve annulus having a perimeter smaller than the minimum perimeter of the annulus portion when the outer frame assembly has the memory shape, the outer frame assembly having a stiffness in resistance to radial compression that varies in an axial direction of the outer frame assembly. - View Dependent Claims (10, 11, 12, 13)
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Specification