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HEMODYNAMIC MONITOR AND METHOD OF HEMODYNAMIC MONITORING

  • US 20130006126A1
  • Filed: 02/10/2011
  • Published: 01/03/2013
  • Est. Priority Date: 02/11/2010
  • Status: Active Grant
First Claim
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1. An apparatus for determining stroke volume comprising:

  • an input for receiving an arterial pressure waveform;

    means for defining a start point within the pressure waveform at the beginning of a systolic arterial pressure increase of a ventricular contraction phase of a heart beat;

    means arranged to determine an end point of the heart beat by identifying a part or point of the pressure waveform that has substantially the same arterial pressure value as said starting point, and, if said arterial pressure value at said starting point is not regained, extrapolating the pressure waveform to a point where it has substantially the same arterial pressure value as said starting point; and

    means for calculating the stroke volume from a part of the pressure waveform or of the extrapolated pressure waveform between the start point and the end point.

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