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Determining hemodynamic performance

  • US 9,173,575 B2
  • Filed: 06/17/2010
  • Issued: 11/03/2015
  • Est. Priority Date: 06/17/2009
  • Status: Active Grant
First Claim
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1. A computer-implemented method for generating visual representations of data related to hemodynamic performance in a human or animal subject comprising:

  • receiving at a data mapping computer processor, first received data measured from the subject over time, from which at least two hemodynamic variables selected from the group including Systemic Perfusion Pressure (SPP), Systemic Vascular Resistance (SVR), Cardiac Output (CO), Heart Rate (HR) and Stroke Volume (SV) are derivable either directly or indirectly or using the equation CO=HR×

    SV;

    operating the data mapping computer processor to transform the first received data corresponding to SVR in such a way that there is an adjustment for pulsatile blood flow caused by left ventricular contractions of the subject, whereby the adjustment produces a new hemodynamic variable referred to as actual Systemic Vascular Resistance (aSVR), where aSVR is calculated as the product of SVR and HR as derived from the first received data;

    further operating the data mapping computer processor to process the new hemodynamic variable, aSVR, and the first received data to produce a display signal, the display signal causing a display device to present a visual mapping relating at least two hemodynamic variables according to the new relationship SPP=SV×

    aSVR; and

    displaying the visual mapping on a display device;

    wherein the visual mapping presented on the display illustrates trends in the subject'"'"'s hemodynamic performance over time, as determined from the first received data measured from the subject over time, and transformed by the data mapping computer processor.

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