1981 Volume 10 Issue 2 Pages 590-593
This study was made as the basic research for the developement of the new tri-leaflet valve prosthesis in aortic position. On the basis of the analysis of the opening characteristics of normal aortic valve, non-stented tri-leaflet valve prosthesis was produced with polyether-urethan-urea. The basic geometry of the leaflet is the ellipsoid of revolution. The optimum tilt angle of the free margin of the leaflet was studied through stress analysis and hydrodynamic simulation. From the result of this study, it became evident that non-stented trileaflet valve should have a tilt angle at 20 degree, and it seems to be one of the fundamental parameters of the leaflet geometry.
