Inventor: Carlos M. G. Duran, MD, PhD
This invention describes the process to make an atrioventricular valve from a biologically compatible synthetic membrane or a biological membrane of autologous, homologous, or heterologous origin. A single piece of the selected membrane material is trimmed so as to form two unequal sheaths similar to the normal anterior and posterior mammalian mitral valve leaflets, including a wide upper base to be sutured to the host’s mitral annulus. These two leaflets are prolonged and tapered into two thin bands to be connected to the papillary muscles, replacing the natural marginal chordae tendinae of the normal mitral valve. The two lateral sides of the membrane are joined to form a truncated cone with a wider upper circular base and a narrow extremity formed by the thin chordal bands. A set of sutures are placed between selected points at the base of the cone and the two thin prolongations serving as replacements for the strut or stay basal chords of the natural mitral valve. Thus, the mitral valve prosthesis is anatomical because it is stentless, bicuspid, and supported by marginal and basal chordae. Obturators and sizers in the configuration of rods of varying diameter, to measure the host’s valve annulus diameter and select the appropriate size of the prosthesis are used during implantation of the prosthesis. A rod-shaped holder maintains the prosthesis during implantation, and a curved, bodied measuring instrument is used to determine the precise location where the chordae tendinae of the prosthesis are to be sutured to the papillary muscles of a recipient mammal.
United States Patent Number: 6,358,277
International Patent Number: WO 99/66967
Date Filed: June 21, 2000
Date Awarded: March 19, 2002
Assigned To: IHIMF