Patent ID: 8114044
Filing Date: 2012-02-14
Classification: A61F,A61M

Abstract:
1. A subcutaneous arteriovenous graft system comprising: an arteriovenous graft having an arterial end, an opposite venous end, and a continuous tubular member therebetween which defines an uninterrupted flow path between the arterial end and venous end; and at least one valve device positioned over and surrounding the arterial end of the arteriovenous graft, the valve device comprising an inner sleeve positioned within an outer sleeve, the inner sleeve being attached to the outer sleeve so as to define a discrete area comprising a balloon, the discrete area being in fluid communication with a fluid delivery device comprising a piston and a spring, the spring applying a biasing force against the piston in a first position wherein, when fluid is fed into the discrete area, the discrete area inflates forcing opposite sides of the graft together and causes the prevention of blood flow through the arteriovenous graft and the arteriovenous graft is positioned within the path of the balloon, the biasing force of the spring against the piston maintaining the inflation of the discrete area, and wherein movement of the piston causes deflation of the discrete area thereby allowing blood to flow through the graft.