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Method of assesing blood volume using photoelectric plethysmography

  • US 20070032732A1
  • Filed: 01/02/2004
  • Published: 02/08/2007
  • Est. Priority Date: 03/12/2003
  • Status: Active Grant
First Claim
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1. A method for assessing blood volume within a subject, comprising:

  • generating a cardiovascular waveform representing physiological characteristics of a subject;

    determining blood volume of the subject by analyzing the cardiovascular waveform, wherein the step of analyzing includes;

    generating a first trace of the per heart-beat maximums of the cardiovascular waveform, which is representative of the systolic pressure upon the cardiovascular signal;

    generating a second trace of the per heart-beat minimums of the cardiovascular waveform, which is representative of the diastolic pressure upon the cardiovascular signal;

    comparing the respective first trace and the second trace to generate an estimate of relative blood volume within the subject.

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