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Method for using photoplethysmography to optimize fluid removal during renal replacement therapy by hemodialysis or hemofiltration

  • US 7,887,502 B2
  • Filed: 09/15/2006
  • Issued: 02/15/2011
  • Est. Priority Date: 09/15/2006
  • Status: Active Grant
First Claim
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1. A method of optimizing fluid removal during renal replacement therapy, said method comprising the steps of:

  • securing a first oximetry/photoplethysmography sensor to a central source site of a patient wherein said first sensor is configured to generate a photoplethysmography signal stream from said central source site;

    processing said photoplethysmography signal stream to determine blood flow and/or volume status, wherein said processing comprises separating said photoplethysmography signal stream into a pulsatile cardiac component and a venous capacitance component;

    monitoring said blood flow and/or volume status; and

    adjusting the ultrafiltration rate of said renal replacement therapy responsive to a change in said blood flow and/or volume status indicated at said central source site.

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