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Volumetric fluid balance control for extracorporeal blood treatment

  • US 20050000868A1
  • Filed: 09/26/2003
  • Published: 01/06/2005
  • Est. Priority Date: 09/27/2002
  • Status: Active Grant
First Claim
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1. A device for balancing the flow of fluids in a blood treatment system, comprising:

  • a balancing mechanism that receives a first flow of fluid that includes renal waste and controls a second flow of fluid including fluid to be infused into a patient to maintain a correct fluid balance of the patient;

    the balancing mechanism employing a volumetric system that is subject to variation in relative flow volume rates due to variations in differences between respective inlet and outlet pressures of said first and second flows;

    said balancing mechanism receiving a compensation signal and adjusting a balance between a ratio of said first flow to said second responsively to said compensation signal;

    a controller configured to generate said compensation signal responsively to at least one pressure measurement, said at least one pressure measurement including at least one of said differences between respective inlet and outlet pressures of said first and second flows.

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