CARDIAC SLEEVE APPARATUS, SYSTEM AND METHOD OF USE
First Claim
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1. A method of forming a cardiac assist sleeve, comprising:
- arranging first elongate strips of a first shape-memory alloy, the first elongate strips having a cross-sectional shape taken perpendicularly across a lengthwise line of symmetry;
arranging second elongate strips of a second shape-memory alloy to intersect and pass the first elongate strips, where the first elongate strips and the second elongate strips define a volume that changes as the cross-sectional shape of the first elongate strips reversibly change between a first cross-sectional shape having flat surfaces and a second cross-sectional shape having one convex surface and one concave surface opposite the convex surface to change the volume of the cardiac assist sleeve; and
securing a first end of the first elongate strips around a collar.
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Abstract
Cardiac assist sleeve and methods for using and making the cardiac assist sleeve that includes first elongate strips and second elongate strips of memory alloy that change shape to change a volume of cardiac assist sleeve.
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Citations
12 Claims
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1. A method of forming a cardiac assist sleeve, comprising:
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arranging first elongate strips of a first shape-memory alloy, the first elongate strips having a cross-sectional shape taken perpendicularly across a lengthwise line of symmetry; arranging second elongate strips of a second shape-memory alloy to intersect and pass the first elongate strips, where the first elongate strips and the second elongate strips define a volume that changes as the cross-sectional shape of the first elongate strips reversibly change between a first cross-sectional shape having flat surfaces and a second cross-sectional shape having one convex surface and one concave surface opposite the convex surface to change the volume of the cardiac assist sleeve; and securing a first end of the first elongate strips around a collar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of using a cardiac assistance device, comprising:
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positioning a cardiac assist sleeve adjacent a left ventricle of a heart, where the cardiac assist sleeve includes; first elongate strips of a first shape-memory alloy, the first elongate strips having a cross-sectional shape taken perpendicularly across a lengthwise line of symmetry; and second elongate strips of a second shape-memory alloy that intersect and pass the first elongate strips, the first elongate strips and the second elongate strips define a volume to receive the left ventricle of the heart; securing a portion of the cardiac assist sleeve to the heart; and assisting the left ventricle of the heart by reversibly changing the cross-sectional shape of at least one of the first elongate strips between a first cross-sectional shape having perpendicular sides and a second cross-sectional shape having one convex surface and on concave surface opposite the convex surface to change the volume of the cardiac assist sleeve. - View Dependent Claims (10, 11, 12)
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Specification