Stentless bioprosthetic heart valve with coronary protuberances and related methods for surgical repair of defective heart valves
First Claim
1. A stentless heart valve bioprosthesis comprising:
- tissue harvested from a mammalian donor animal, said tissue including an aortic segment having a wall, an inflow end, an outflow end, and a lumen extending therethrough and right and left coronary artery segments extending outwardly from said aortic segment, said coronary artery segments having open coronary lumens which extend longitudinally therethrough, such that some of the blood which enters the lumen of the aortic segment may flow outwardly through said coronary lumens; and
,a plurality of valve leaflets disposed within said aortic segment, said valve leaflets being alternately moveable between i) open positions whereby blood is permitted to flow in a first direction through the lumen of said aortic segment; and
ii) closed positions whereby blood is prevented from backflowing in a second direction through the lumen of said aortic segment,wherein the bioprosthesis has been subjected to a chemical fixation process comprising placing support members into the coronary lumens during the chemical fixation process.
2 Assignments
0 Petitions
Accused Products
Abstract
A stentless aortic bioprosthesis having patent, non-ligated coronary artery segments extending therefrom, and methods for surgical replacement of aortic and/or non-aortic (e.g., pulmonary) heart valves with such stentless aortic bioprosthesis. The presence of the patent, non-ligated coronary segments facilitates end to end anastomosis of the patient'"'"'s native coronary arteries and/or existing coronary artery bypass grafts to the coronary segments of the bioprosthesis even when such native coronary arteries (or coronary grafts) are too short to reach the wall of the aortic segment of the bioprosthesis. The presence of such patent, non-ligated coronary segments also eliminates the need for removal of a "button" or segment of the native aorta in connection with the native coronary artery segments prior to implantation of the bioprosthesis, and is thus advantageous for patients whose ascending aorta is diseased or otherwise compromised.
158 Citations
27 Claims
-
1. A stentless heart valve bioprosthesis comprising:
-
tissue harvested from a mammalian donor animal, said tissue including an aortic segment having a wall, an inflow end, an outflow end, and a lumen extending therethrough and right and left coronary artery segments extending outwardly from said aortic segment, said coronary artery segments having open coronary lumens which extend longitudinally therethrough, such that some of the blood which enters the lumen of the aortic segment may flow outwardly through said coronary lumens; and
,a plurality of valve leaflets disposed within said aortic segment, said valve leaflets being alternately moveable between i) open positions whereby blood is permitted to flow in a first direction through the lumen of said aortic segment; and
ii) closed positions whereby blood is prevented from backflowing in a second direction through the lumen of said aortic segment,wherein the bioprosthesis has been subjected to a chemical fixation process comprising placing support members into the coronary lumens during the chemical fixation process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method for total root replacement of an endogenous aortic heart valve in a mammalian patient, said method comprising the steps of:
-
A. providing an aortic bioprosthcsis which comprises; i) an aortic segment having a wall, an inflow end, an outflow end, and a lumen extending therethrough; ii) right and left coronary artery segments extending outwardly from said aortic segment, said coronary artery segments having open coronary segment lumens which extend longitudinally therethrough, such that some of the blood which enters the lumen of the aortic segment may flow outwardly through said coronary segment lumens; and
,iii) a plurality of valve leaflets disposed within said aortic segment, said valve leaflets being alternately moveable between a) open positions whereby blood is permitted to flow in a first direction through the lumen of said aortic segment; and
b) closed positions whereby blood is prevented from backflowing in a second direction through the lumen of said aortic segment;B. surgically transecting the patient'"'"'s right and left coronary arteries at locations which are spaced distances away from the wall of the patient'"'"'s ascending aorta; C. surgically removing a segment of the patient'"'"'s ascending aorta, along with at least the leaflets of the endogenous aortic valve; D. anastomosing the aortic bioprosthesis to the patient'"'"'s native tissues such that the aortic bioprosthesis replaces the removed segment of the ascending aorta; and
,E. anastomosing the patient'"'"'s coronary arteries to the coronary segments of the bioprosthesis, at spaced distances from the wall of the aortic segment of the bioprosthesis. - View Dependent Claims (18)
-
-
19. A tanning kit for manufacturing an implantable stentless heart valve bioprosthesis comprising:
-
a heart valve harvested from a mammalian donor animal, said heart valve including an aortic segment having a wall, an inflow end, an outflow end, and a lumen extending therethrough, right and left coronary artery segments extending outwardly from said aortic segment, and a plurality of valve leaflets disposed within said aortic segment, said valve leaflets being alternately moveable between i) open positions whereby blood is permitted to flow in a first direction through the lumen of said aortic segment; and
ii) closed positions whereby blood is prevented from backflowing in a second direction through the lumen of said aortic segment; andsupport members configured to closely fit within the coronary lumens during tanning so that after tanning said coronary artery segments have open coronary lumens which extend longitudinally therethrough, and blood which enters the lumen of the aortic segment may flow outwardly through said coronary lumens. - View Dependent Claims (20, 21, 22, 23, 24)
-
-
25. A stentless heart valve bioprosthesis comprising:
-
tissue harvested from a mammalian donor animal, said tissue including an aortic segment having a wall, an inflow end, an outflow end, and a lumen extending therethrough and right and left coronary artery segments extending outwardly from said aortic segment, said coronary artery segments having open coronary lumens which extend longitudinally therethrough, such that some of the blood which enters the lumen of the aortic segment may flow outwardly through said coronary lumens, wherein said tissue comprises connective tissue proteins which have been crosslinked by at least one fixative agent selected from the group of fixative agents consisting of; an aldehyde; glutaraldehyde; formaldehyde; a polyepoxy compound; dialdehyde starch; hexamethylene diisocyanate; and combinations thereof; and
,a plurality of valve leaflets disposed within said aortic segment, said valve leaflets being alternately moveable between i) open positions whereby blood is permitted to flow in a first direction through the lumen of said aortic segment; and
ii) closed positions whereby blood is prevented from backflowing in a second direction through the lumen of said aortic segment. - View Dependent Claims (26, 27)
-
Specification