Patent ID: 6743193
Filing Date: 2004-06-01
Classification: A61M,Y10T

Abstract:
A device for selectively directing flow in a fluid circuit of a blood treatment system, comprising:a valve body with ports; said valve body being shaped such that it can be selectively deformed into a first configuration to define at least one first flow channel connecting a first port of said ports to a second port of said ports while isolating said at least one first flow channel from a third port of said ports; said valve body being shaped such that it can be selectively deformed into a second configuration to define at least one second flow channel connecting said first port to said third port while isolating said at least one second flow channel from said second port; an actuator having an engagement portion positionable in a first position to selectively deform said valve body in said first configuration and positionable in a second position to selectively deform said valve body in said first configuration; said first and second flow channels having a substantially constant cross-sectional area from said first port to said second port in said first configuration and from said first to said third in said second configuration; said first and second flow channels including said ports such that a hydraulic diameter is maintained substantially constant from a point in a flow immediately prior to entering said valve body to a point immediately after leaving said valve body such that a flow would experience substantially no mean flow deceleration within said valve body.