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DETERMINING ARTERIAL PULSE TRANSIT TIME FROM TIME-SERIES SIGNALS OBTAINED AT PROXIMAL AND DISTAL ARTERIAL SITES

  • US 20160106328A1
  • Filed: 10/16/2014
  • Published: 04/21/2016
  • Est. Priority Date: 10/16/2014
  • Status: Abandoned Application
First Claim
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1. A method for determining arterial pulse wave transit time for a subject, comprising:

  • receiving a time-series signal for each of a proximal and distal arterial site of a subject'"'"'s body, said time-series signals being derived from any of;

    a contact-based photoplethysmographic (PPG) device and from processing image frames acquired by a video imaging device capable of registering a videoplethysmographic (PPG) signal on a least one imaging channel use to acquire that video;

    obtaining a proximal and distal analytic signal each comprising a first component that is a waveform of a respective received time-series signal and a second component that is a transform of that waveform;

    determining a phase function with respect to time for said first and second components of each of said proximal and distal analytic signals;

    subtracting said phase function for said proximal waveform from said phase function for said distal waveform to obtain a phase difference; and

    processing said phase difference with said subject'"'"'s heart rate to determine an arterial pulse wave transit time between said proximal and distal arterial sites.

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