An especially designed double lumen catheter (10) for use in a device for in-vivo purification of blood, by means of which blood pumped out of a vein is subjected to intensive ultrafiltration and the retentate, together with a quantity of a substitute fluid roughly coresponding, volumetrically, to the...http://www.google.de/patents/US4648865?utm_source=gb-gplus-sharePatent US4648865 - Device for in vivo purification of blood
