Oval aortic stent
AssigneeEdwards Lifesciences Corporation
InventorsYuval Kasher, Emil Karapetian, Roei Mayo
Life of this patent
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Abstract
A stent comprises a network of elastically deformable struts having a biased cross-sectional shape and forming a first end portion having a first central diameter in a major dimension and a second central diameter in a minor dimension, wherein the first central diameter is greater than the second central diameter, a second end portion having the first central diameter in the major dimension and the second central diameter in the minor dimension, and a middle portion situated between the first end portion and the second end portion, the middle portion having a third central diameter in the major dimension and the second central diameter in the minor dimension, the third central diameter being less than the first central diameter.
Claims20
A collapsible and expandable stent sized for placement in an aorta, the stent comprising:
- a network of elastically deformable struts forming a scaffold including multiple portions, at least some of the portions having a biased substantially oval cross-section with major and minor dimensions, wherein the at least some of the portions of the scaffold contract along a major dimension and expand in a minor dimension with increased blood pressure in the aorta, the scaffold forming:
- a first end portion having the biased substantially oval cross-section including a first central diameter in the major dimension and a second central diameter in the minor dimension, wherein the first central diameter is greater than the second central diameter;
- a second end portion having the biased substantially oval cross-section including the first central diameter in the major dimension and the second central diameter in the minor dimension;
- and
- a middle portion situated between the first end portion and the second end portion, the middle portion having a third central diameter in the major dimension and the second central diameter in the minor dimension, the third central diameter being less than the first central diameter and extending between first and second tension springs that resist circularization of the first and second end portions.
A stent for adding compliance to a blood vessel, the stent comprising:
- a network of elastically deformable struts forming a scaffold including multiple portions, at least some of the portions having a biased non-circular cross-section with major and minor dimensions, wherein the at least some of the portions of the scaffold contract along a major dimension and expand in a minor dimension with increased blood pressure in the blood vessel, the scaffold forming:
- a first end portion having the biased non-circular cross-section including a first central diameter in the major dimension and a second central diameter in the minor dimension, wherein the first central diameter is greater than the second central diameter;
- a second end portion having the biased non-circular cross-section including the first central diameter in the major dimension and the second central diameter in the minor dimension;
- and
- a middle portion situated between the first end portion and the second end portion and comprising one or more support arms extending at least partially across a lumen formed by the first end portion and the second end portion, wherein a shape of the middle portion is different than shapes of the first end portion and second end portion.
A stent for adding compliance to a blood vessel for improving blood circulation, the stent comprising:
- a network of elastically deformable struts forming a tubular scaffold including multiple portions, at least some of the portions having a biased non-circular cross-section with major and minor dimensions, wherein the at least some of the portions of the scaffold contract along a major dimension and expand in a minor dimension with increased blood pressure in the blood vessel, the scaffold forming:
- a first end portion having the biased non-circular cross-section including a first central diameter in the major dimension and a second central diameter in the minor dimension, wherein the first central diameter is greater than the second central diameter;
- a second end portion having the biased non-circular cross-section including the first central diameter in the major dimension and the second central diameter in the minor dimension;
- and
- a middle portion situated between the first end portion and the second end portion and comprising two or more support arms forming sides of the middle portion, the two or more support arms extending at least partially across a lumen formed by the first end portion and the second end portion;
- wherein elastic deformation of the stent emulates the compliance of a healthy blood vessel during cyclic changes in luminal blood pressure, thereby improving circulation in a patient.
Dependencies are inferred from the claim text.