Patent ID: 7455657

Claim:
A device for modifying a fluid moving through a vessel prior to the ejection of the fluid from the vessel into the body of a patient, the device comprising: a first lumen; a second lumen; an exit orifice located at a distal end of the first lumen; a mixing chamber positioned within the first lumen proximal to the exit orifice, the mixing chamber in communication with the exit orifice, and a passageway located proximal to the exit orifice, the passageway being positioned between the mixing chamber and the second lumen and fluidly connecting the mixing chamber to the second lumen, the second lumen being connected to the mixing chamber at a location proximal to the exit orifice, the passageway containing a selectively permeable membrane positioned to selectively pass compounds through the passageway between the mixing chamber and the second lumen; wherein the selectively permeable membrane is adapted to extract a compound from fluid in the mixing chamber and into the second lumen.