Wearable Pulse Wave Velocity Blood Pressure Sensor and Methods of Calibration Thereof

  • US 20080039731A1
  • Filed: 08/17/2007
  • Published: 02/14/2008
  • Est. Priority Date: 08/22/2005
  • Status: Active Grant
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First Claim
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17. An apparatus for performing a circulatory measurement on an extremity of a subject, the apparatus comprising:

  • a first plethysmographic sensor disposed at a first position on the extremity of the subject;

    a second plethysmographic sensor disposed at a second position on the extremity of the subject, wherein the second position is characterized by a distance with respect to the first position;

    a processor for obtaining the circulatory measurement based on a derived transit time and the distance between the first and second positions and a calibration and a calibration relating the circulatory measurement to the derived wave speed.

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