Apparatus for removing air bubbles from blood and from a dialysate solution are described herein. In one cassette-style embodiment of a blood debubbler, the debubbler includes front and rear covers, a fluid circuit board between the front and rear covers and defining a blood chamber ...http://www.google.es/patents/US5674397?utm_source=gb-gplus-sharePatente US5674397 - Debubblers