Artificial heart valve attachment apparatus and methods
Heart valve attachment apparatus and methods that significantly reduce attachment times are provided. The apparatus and methods utilize a connector band to form an interface between a uni-directional valve and a tissue annulus. The connector band is secured to the tissue annulus by retention fingers.
1. A method for deploying and securing to a tissue annulus a uni-directional valve having (1) a circumference that, in use, is concentric with the tissue annulus, and (2) a plurality of fingers that are spaced from one another around the circumference of the valve, each of the fingers having a free end portion that is configured to point in a circumferential direction around the circumference of the valve when the free end portion is unconstrained by other apparatus, the method comprising:
positioning the valve into the annulus;
rotating the valve in the circumferential direction that the free end portions of the fingers point; and
thereby causing the free end portion of each finger to penetrate and continue into the tissue of the annulus in the circumferential direction at the location of that finger.
2. The method of claim 1 , wherein the positioning comprises rotating the valve in a circumferential direction around the circumference of the valve opposite to the circumferential direction that the free end portions of the fingers point.
3. The method of claim 1 , wherein the free end portions of the fingers are barbed, and wherein the causing comprises penetrating the tissue with barbs on the free end portions of the fingers.
4. The method of claim 1 , wherein the rotating comprises using a tool to perform the rotating.
5. The method of claim 1 , wherein the valve is a heart valve and wherein the annulus is a heart passageway.
6. A valve apparatus for deploying in and securing to a tissue annulus comprising:
a uni-directional valve portion for passing fluid in one direction and obstructing fluid in an opposite direction, the valve portion having a circumference that, in use, is concentric with the tissue annulus; and
a plurality of fingers that are spaced from one another around the circumference of the valve portion, each of the fingers having a free end portion that is configured to point in a circumferential direction around the circumference of the valve when the free end portion is unconstrained by other apparatus, the free end portion of each of the fingers being further configured to penetrate and continue into the tissue of the annulus in the circumferential direction when the valve portion is placed concentrically in the annulus and rotated in the circumferential direction, wherein the free end portions of the fingers are barbed.
7. The valve of claim 6 , wherein the valve is configured for positioning into the annulus by rotating the valve in a circumferential direction opposite to the circumferential direction in which the free end portions of the fingers point.
8. The valve of claim 6 , wherein the rotation of the valve is performed using a tool.
9. The valve of claim 6 , wherein the valve is a heart valve and wherein the annulus is a heart passageway.