Patent ID: 6217826
Filing Date: 2001-04-17
Classification: A61M,B01D,B01F

Abstract:
A blood pump-oxygenator comprising:(a) a housing defining a blood flow path and having a venous blood inlet, an arterial blood outlet, an oxygen inlet and an oxygen outlet;(b) a double lumen shaft defining a gas inlet path and a gas outlet path; wherein the double lumen shaft gas inlet path is in fluid communication with the housing gas inlet and the double lumen shaft gas outlet is in fluid communication with the housing gas outlet; and(c) at least one distributor element past which blood may flow, mounted on the double lumen shaft, the at least one distributor element having:(i) an inner ring with a first face and a second face;(ii) an outer ring concentrically spaced with respect to the inner ring such that the inner ring and the outer ring define an oxygen supply plenum and an oxygen return plenum;(iii) a first hollow spoke in fluid communication with the oxygen inlet path and the oxygen supply plenum;(vi) a second hollow spoke in fluid communication with the oxygen outlet path and the oxygen return plenum; and(vii) a plurality of selectively fluid-permeable membrane elements extending across the distributor disk blood flow path, each of the selectively fluid-permeable membrane elements in fluid communication with the oxygen supply plenum and the oxygen return plenum; and wherein when blood flows through the housing flow path and oxygen flows through and diffuses across the plurality of selectively fluid-permeable membrane elements and when the at least one distributor element rotates about the at least one double lumen shaft oxygenation/decarbonation of blood and simultaneous pumping of blood occurs.