Patent ID: 8328769
Filing Date: 2012-12-11
Classification: A61M

Abstract:
1. A method of bi-directional fluid flow control in opposite infusion and aspiration directions through an intravascular device including a catheter, the method comprising the steps of: providing a pressure-actuated valve component for use in IV therapy, said valve component comprising: fluidly coupling the valve component with the catheter; introducing a forward fluid flow through the valve component to create said infusion fluid pressure differential across the arcuate-shaped wall, such that upon a pressure against the concave surface of the valve wall being approximately greater than a predetermined fluid cracking pressure of the valve wall, said slit flexing distally to open; terminating the forward fluid flow through the valve component, such that upon the pressure against the concave surface dropping below the predetermined fluid cracking pressure, the rib serves to bias the slit proximally into said normally-closed, flow-blocking position; and introducing a rearward fluid flow through the valve component to create said aspiration fluid pressure differential across the arcuate-shaped wall, such that upon a pressure against the convex surface of the valve wall being approximately greater than a predetermined fluid collapsing pressure of the valve wall, said slit flexing proximally to open, wherein upon the slit flexing proximally to open, a limited portion of the arcuate-shaped wall flexes proximally.