Patent ID: 6562068
Filing Date: 2003-05-13
Classification: A61F

Abstract:
A method for forming a venous valve for directing blood flow in an antegrade direction to an autologous vein that requires a venous valve, said method comprising the steps of,A. providing a tubular conduit means, said tubular conduit means having an axis with axial direction and having a tubular conduit inlet end for providing passage for the blood flow from an upstream portion of the autologous vein to said tubular conduit means and a tubular conduit outlet end for providing passage for blood flow from said tubular conduit means to a downstream portion of the autologous vein, B. invert folding a portion of a wall of said tubular conduit means along a first wall line with axial componency and holding it in apposition with another portion of a wall with axial componency to form two regions, a first region having an open inlet end and an open outlet end, and a second region having an open outlet end and closed inlet end, C. holding a portion of the wall of said first region along a second wall line with axial componency into contact with a portion of a wall of said second region forming at least a portion of a valve cusp, whereby said first region provides passage for antegrade blood flow and the portion of said valve cusp directs a portion of retrograde blood flow into said open outlet end of said second region.