Multipiece prosthetic mitral valve and method
First Claim
Patent Images
1. A method of treating a deficient native mitral valve, comprising:
- inserting an introducer sheath into a left ventricle through a wall of the left ventricle at a location exterior of a space defined by chordae tendineae therein;
locating a distal tip of the introducer sheath adjacent to an outflow side of a native mitral valve;
delivering a support band through the introducer sheath into the left ventricle adjacent the outflow side of the native mitral valve;
positioning the support band to surround native leaflets of the native mitral valve, adjacent to an outflow side of the native mitral valve, the support band carried by a first catheter inserted into the left ventricle through the introducer sheath;
delivering a prosthetic heart valve into an annulus of the native mitral valve, the prosthetic heart valve carried by a second catheter inserted into the left ventricle through the introducer sheath while the position of the support band is maintained by the first catheter, the prosthetic heart valve comprising a radially expandable stent and a valve structure mounted within the expandable stent, the valve structure formed with pericardial tissue, the prosthetic heart valve being separate from the support band;
expanding the stent within the annulus of the native mitral valve and within the support band, thereby engaging the stent with an interior of the support band; and
releasing the support band from the first catheter,wherein, after the stent is expanded, the native leaflets of the native mitral valve are frictionally secured between an outer wall of the stent and the support band and wherein the valve structure replaces the function of the native mitral valve.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for replacing a deficient native mitral valve includes positioning a support band around the leaflets of a native mitral valve and expanding a prosthetic heart valve within the native mitral valve. After the prosthetic heart valve is expanded, the leaflets of the native mitral valve are captured between the prosthetic heart valve and the support band. The prosthetic heart valve and support band are delivered into the body as separate and independent components. The prosthetic heart valve and support band may be deliverable into the left ventricle via a transapical approach in a minimally invasive procedure.
-
Citations
17 Claims
-
1. A method of treating a deficient native mitral valve, comprising:
-
inserting an introducer sheath into a left ventricle through a wall of the left ventricle at a location exterior of a space defined by chordae tendineae therein; locating a distal tip of the introducer sheath adjacent to an outflow side of a native mitral valve; delivering a support band through the introducer sheath into the left ventricle adjacent the outflow side of the native mitral valve; positioning the support band to surround native leaflets of the native mitral valve, adjacent to an outflow side of the native mitral valve, the support band carried by a first catheter inserted into the left ventricle through the introducer sheath; delivering a prosthetic heart valve into an annulus of the native mitral valve, the prosthetic heart valve carried by a second catheter inserted into the left ventricle through the introducer sheath while the position of the support band is maintained by the first catheter, the prosthetic heart valve comprising a radially expandable stent and a valve structure mounted within the expandable stent, the valve structure formed with pericardial tissue, the prosthetic heart valve being separate from the support band; expanding the stent within the annulus of the native mitral valve and within the support band, thereby engaging the stent with an interior of the support band; and releasing the support band from the first catheter, wherein, after the stent is expanded, the native leaflets of the native mitral valve are frictionally secured between an outer wall of the stent and the support band and wherein the valve structure replaces the function of the native mitral valve. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for treating a deficient mitral valve, the method comprising:
-
forming a partial loop around at least some of the chordae tendineae of a native mitral valve with a cord of biocompatible material; securing a locking member to at least two portions of the cord to form a closed loop; positioning the closed loop around leaflets of the native mitral valve; positioning an expandable prosthetic heart valve into an interior of the mitral valve; and expanding the expandable prosthetic heart valve, thereby causing an exterior surface of the expandable prosthetic heart valve to urge native leaflets of the mitral valve against an interior surface of the closed loop and to frictionally secure the expandable prosthetic heart valve to the native leaflets of the native mitral valve. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
-
-
15. A method for treating a deficient native mitral valve, the method comprising:
-
advancing a first end of a support band out of a distal end of a first catheter, the support band at least partially encircling the chordae tendineae of a native mitral valve; receiving the first end of the support band in a distal end of a second catheter; advancing a locking member over the support band to form a loop; adjusting a diameter of the loop formed by the support band and the locking member to a desired diameter and securing the locking member to the support band; advancing an expandable prosthetic heart valve into the mitral valve and the interior of the loop formed by the support band and the locking member while the prosthetic heart valve is in a compressed state; and expanding the expandable prosthetic heart valve into an uncompressed state, thereby causing one or more native leaflets of the mitral valve to be frictionally secured between the loop and the expandable prosthetic heart valve. - View Dependent Claims (16, 17)
-
Specification