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Systems and methods of blood-based therapies having a microfluidic membraneless exchange device

  • US 7,588,550 B2
  • Filed: 07/11/2007
  • Issued: 09/15/2009
  • Est. Priority Date: 03/14/2003
  • Status: Expired due to Fees
First Claim
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1. A method of performing a blood treatment, comprising:

  • along a microfluidic channel, placing blood from a patient in direct contact with an extraction fluid, without mixing, such that blood proteins and uremic toxins move from the blood into the extraction fluid;

    moving the extraction fluid out of contact with the blood at an end of the channel and into contact with a membrane at a pressure, and thereby passing water and uremic toxins in the extraction fluid through the membrane at a pressure sufficient to concentrate the blood proteins in a fraction of the extraction fluid and placing the resulting fraction in direct contact with the blood at a beginning of the channel, a recirculation of extraction fluid resulting in a concentration of blood proteins such that blood proteins are returned to the blood in the channel by diffusion.

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