Patent ID: 8398581

Claim:
A fluid exchange catheter system, comprising: an inner lumen having a proximal end and a distal end, wherein the proximal end of the inner lumen is connected to an infusion fluid source; an infusion mechanism operably connected with the inner lumen to pass infusion fluid from the infusion fluid source through the inner lumen to discharge at an opening in the distal end of the inner lumen; an outer lumen having a proximal end, a distal end and a lumen wall extending between the proximal end and the distal end forming an interior lumen space, wherein the outer lumen is operably connected to an aspiration mechanism; wherein the infusion mechanism and the aspiration mechanism are programmed to create a pattern of positive pressure in the inner lumen and a synchronized pattern of negative pressure in the outer lumen; and wherein the distal end of the inner lumen is disposed within the interior lumen space of the outer lumen such that a fluid exiting the inner lumen through an opening in the distal end of the inner lumen flows into the interior lumen space of the outer lumen.