Patent ID: 7922687

Claim:
A catheter assembly for use in the extracorporeal treatment of bodily fluids, comprising: a catheter body, said catheter body having a withdrawal port, an infusion port, and a plurality of lumens therein; one of said lumens comprising a withdrawal lumen for transport of fluids withdrawn from a body vessel through said withdrawal port to an extracorporeal treatment unit, and another of said lumens comprising an infusion lumen for infusion of treated fluids from said extracorporeal treatment unit through said infusion port into the vessel, said catheter body including at least one additional lumen; and a wire extending from said at least one additional lumen to an attachment point on said catheter assembly, said wire defining a loop extending radially outwardly from said catheter body and oriented in a manner such that when said catheter is in said vessel said wire maintains a spacing between said withdrawal port and a wall of said vessel; said catheter assembly further comprising a manifold disposed at a proximal end of said catheter body, wherein a proximal end of said wire extends through said at least one additional lumen and said manifold and a distal end of said wire comprises said radially extending portion; the proximal end of said wire being movable between a first position wherein said wire distal end does not extend radially outwardly, and a second position wherein said wire distal end extends radially outwardly from said catheter body to define said loop; and a stop member at said proximal end of said wire for selectively limiting movement of said wire between said first and second positions to a defined distance.