Patent attributes
A venous valve device provides antegrade blood flow in venous vessels of the body having dysfunctional valves; it is formed in situ from autologous vein conduit not having a valve present locally. An overlap region is formed by attaching two opposing walls of the vein together in a generally axial direction forming two tubular regions. One region provides antegrade blood flow and the other region provides a sinus cavity that is filled during the initiation of retrograde blood flow. A valve cusp is formed by attaching vessel wall together forming a commissure that extends between the two overlap regions. A single valve cusp moves toward the sinus cavity to allow antegrade blood flow and moves away from the sinus cavity to block retrograde blood flow. The venous valve can also be formed from biological tissue from an autologous, heterologous, or other tissue source and implanted interpositionally at the site of valvular incompetancy.
