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System and method for noninvasive hemodynamic measurements in hemodialysis shunts

  • US 6,117,099 A
  • Filed: 12/03/1997
  • Issued: 09/12/2000
  • Est. Priority Date: 10/23/1996
  • Status: Expired due to Term
First Claim
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1. A method for determining access blood flow (Qa) in a dialysis system having arterial and venous tubing lines reversed, said method comprising the steps of:

  • selecting an initial ultrafiltration rate (UFR);

    measuring the post dialyzer hematocrit, Ha, at the initial UFR;

    changing the value of the UFR to a second UFR;

    measuring a post dialyzer hematocrit, Ho, at the second UFR with the dialyzer blood flow being fixed and known; and

    solving the equation ##EQU6##

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