POLYMER HEART VALVE WITH HELICAL COAPTION SURFACE
First Claim
1. A heart valve comprising:
- a body;
a plurality of flexible leaflets attached to the body, each leaflet including a top portion and a bottom portion;
the bottom portion being a surface defined as a cylinder having an axis, a radius and an axial section;
a first section of the top portion being a surface defined by a first arc having a first radius swept along a first helix, the first helix being a right handed helix having the same radius and axis as the cylinder; and
a second section of the top portion being a surface defined by a second arc having a second radius swept along a second helix, the second helix being a left handed helix having the same radius and axis as the cylinder.
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Accused Products
Abstract
A polymer heart valve has a leaflet with a base geometry of a cylinder for simplicity and effective opening. A helical swept surface is added to the top of the cylinder to enhance stable coaption. The heart valve includes a plurality of flexible leaflets. Each leaflet includes a top portion and a bottom portion. The bottom portion is an axial section of a cylinder having an axis and a radius. A first section of the top portion is a surface defined by a first arc having a first radius swept along a first helix. The first arc is tangent to the axial section of the cylinder. A second section of the top portion is a surface defined by a second arc having a second radius swept along a second helix. The second arc is tangent to the axial section of the cylinder. The second helix is a left-handed helix having the same radius and axis as the cylinder.
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Citations
20 Claims
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1. A heart valve comprising:
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a body;
a plurality of flexible leaflets attached to the body, each leaflet including a top portion and a bottom portion;
the bottom portion being a surface defined as a cylinder having an axis, a radius and an axial section;
a first section of the top portion being a surface defined by a first arc having a first radius swept along a first helix, the first helix being a right handed helix having the same radius and axis as the cylinder; and
a second section of the top portion being a surface defined by a second arc having a second radius swept along a second helix, the second helix being a left handed helix having the same radius and axis as the cylinder. - View Dependent Claims (2, 3, 4, 5)
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6. A heart valve comprising:
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a body;
a plurality of flexible leaflets attached to the body, each leaflet including a top portion and a bottom portion;
the bottom portion being a surface defined as a cylinder having an axis, a radius and an axial section;
a first section of the top portion being a surface defined by a first arc having a first radius swept along a first helix, the first arc being tangent to the axial section of the cylinder, the first helix being a right handed helix having the same radius and axis as the cylinder; and
a second section of the top portion being a surface defined by a second arc having a second radius swept along a second helix, the second arc being tangent to the axial section of the cylinder, the second helix being a left handed helix having the same radius and axis as the cylinder. - View Dependent Claims (7, 8, 9, 10, 11, 13, 14, 15, 17, 18, 19, 20)
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12. A method of forming a heart valve comprising:
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providing a body;
attaching a plurality of leaflets to the body;
providing a top portion and a bottom portion for each leaflet;
forming the bottom portion from a cylinder having an axis, a radius and an axial section;
forming a first section of the top portion by a first arc having a first radius swept along a first helix, wherein the first helix is a right handed helix having the same radius and axis as the cylinder; and
forming a second section of the top surface by an arc having a second radius swept along the second helix, the second helix being a left handed helix having the same radius and axis as the cylinder.
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16. A method of forming a heart valve comprising:
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providing a body;
attaching a plurality of leaflets to the body;
providing a top portion and a bottom portion for each leaflet;
forming the bottom portion from a cylinder having an axis, a radius and an axial section;
forming a first section of the top portion by a first arc having a first radius swept along a first helix, the first arc being tangent to the axial section of the cylinder, wherein the first helix is a right handed helix having the same radius and axis as the cylinder; and
forming a second section of the top surface by an arc having a second radius swept along the second helix, the second arc being tangent to the axial section of the cylinder, the second helix being a left handed helix having the same radius and axis as the cylinder.
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Specification