The present mass transfer apparatus between two media is especially adapted to blood dialysis. To assure an undisturbed flow of the blood through the dialyser and to avoid coagulation all flow channels are shaped to avoid dead corners and choking zones so that the blood is prevented from forming wakes...http://www.google.es/patents/US4141835?utm_source=gb-gplus-sharePatente US4141835 - Apparatus for the mass transfer between two media
