Aortic Valve Devices
The present disclosure provides aortic valve prosthetic devices that are constructed in an elliptical shape, or are expandable to an elliptical shape for improved results in the repair of defective aortic valves. The devices can be surgically implanted, or they can be implanted percutaneously through an insertion catheter. The expandable devices can be self-expanding or expanded by an inflatable balloon to an elliptical cross section geometry.
1 . A medical device for implantation into an aortic valve of a mammal, the device comprising an elliptical cross sectional shape in a plane perpendicular to the direction of blood flow through the aortic valve.
2 . The device of claim 1 , further described as comprising a base and commissure support members attached to the base, wherein the members flare outwardly from the base at an angle of from 8°-12° from a line perpendicular to the outer edge of the elliptical cross-section.
3 . The device of claim 2 , wherein the members extend away from the base at an outward angle of about 10° from a line perpendicular to the outer edge of the elliptical cross-section.
4 . The device of claim 1 , wherein the ratio of the major axis of the ellipse to the minor axis of the ellipse is between about 1.2 and 1.8.
5 . The device of claim 4 , wherein the ratio of the major axis of the ellipse to the minor axis of the ellipse is about 1.5.
6 . The device of claim 1 , wherein the length of the major axis of the elliptical cross section is between about 10 millimeters and about 35 millimeters.
7 . The device of claim 1 , wherein the length of the minor axis of the elliptical cross section is between about 8 millimeters and about 25 millimeters.
8 . The device of claim 1 , wherein the device comprises a plastic, a polymer, a metal, a thermoplastic, a resin, or combinations thereof.
9 . The device of claim 8 , wherein the device comprises metal.
10 . The device of claim 9 , wherein the intra-annular mounting frame comprises metal wire.
11 . The device of claim 1 , wherein at least a portion of the device is coated or covered.
12 . The device of claim 11 , wherein at least a portion of the device is coated or covered with a polymer-type fiber cloth.
13 . The device of claim 1 , wherein the device is constructed of a compressible and expandable material effective to be compressible into a percutaneous delivery system and expandable to an elliptical geometry when released.
14 . The device of claim 13 , wherein the device is self expanding.
15 . The device of claim 14 , wherein the device comprises Nitinol.
16 . A method of repairing an aortic valve having an aortic wall, cusps and commissures, comprising inserting the device according to claim 1 into the aortic valve.
17 . The method of claim 16 , wherein the device is sutured into the aortic valve.
18 . The method of claim 17 , further comprising buttressing tissue of the aortic wall by placing pledgets onto the sutures above the cusps of the aortic valve.
19 . The method of claim 18 , wherein the pledgets comprise TEFLON® felt or DACRON® pledgets.