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Calibration of a doppler velocimeter for stroke volume determination

  • US 7,186,219 B2
  • Filed: 10/10/2002
  • Issued: 03/06/2007
  • Est. Priority Date: 10/11/2001
  • Status: Expired due to Term
First Claim
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1. A method of monitoring the stroke volume (SV) of a subject'"'"'s heart at different time periods, comprising the steps of:

  • determining a reference stroke volume (SVREF) of the subject'"'"'s heart by a first method different from Doppler velocimetry in a first time period;

    simultaneously determining a reference systolic velocity integral (SVICAL) by Doppler velocimetry;

    calculating a constant kCAL, wherein
    kCAL=SVREF/SVICAL;

    determining a systolic velocity integral (SVI) at later time periods by Doppler velocimetry; and

    determining the stroke volume (SV) at said later periods by setting SV=kCAL·

    SVL.

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