Patent ID: 7534616
Filing Date: 2009-05-19
Classification: A61M,Y10T

Abstract:
1. An apparatus for providing substantially stable flow of a biological fluid comprising: an outer chamber adapted to contain a sealed flexible chamber, wherein said outer chamber is adapted to provide a space containing a pressure sensitive medium around said sealed flexible chamber; said sealed flexible chamber adapted to contain fluid, wherein said sealed flexible chamber comprises a fluid path between said sealed flexible chamber and an exterior of said outer chamber; a receiving container that is in fluid communication with said sealed flexible chamber via a photoactivation element, and is adapted for returning said fluid from said receiving container to said sealed flexible chamber; a pressure reservoir adapted for continuously increasing or decreasing the pressure in a uniform and controlled manner within said space around said sealed flexible chamber; a pressure valve adapted for continuously increasing or decreasing the pressure in a uniform and controlled manner within said space around said sealed flexible chamber, wherein said apparatus renders said biological fluid suitable for return to a patient; and means for monitoring the properties of fluid displaced into or out of said sealed flexible chamber, wherein said means for monitoring comprises a load cell.