×

Sensor calibration and blood volume determination

  • US 20030130570A1
  • Filed: 12/09/2002
  • Published: 07/10/2003
  • Est. Priority Date: 10/14/1997
  • Status: Active Grant
First Claim
Patent Images

1. A method for measuring a blood volume change, the method comprising:

  • (a) connecting an arterial tubing portion of a dialysis system to withdraw blood from a patient and connecting a venous tubing portion of the dialysis system to deliver filtered blood to the patient;

    (b) operably coupling an optical sensor to the venous tubing portion of the dialysis system;

    (c) changing an ultrafiltration rate of the dialysis system;

    (d) determining at least one photometric property of blood at the venous tubing portion of dialysis system;

    (e) determining a calibration coefficient of at least the optical sensor; and

    (f) determining a blood volume change corresponding the calibration coefficient.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×