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Spectrometric systems and methods for improved focus localization of time- and space-varying measurements

  • US 10,260,947 B2
  • Filed: 08/06/2018
  • Issued: 04/16/2019
  • Est. Priority Date: 04/30/2012
  • Status: Active Grant
First Claim
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1. A method for measurement of a beat-to-beat cardiac stroke volume variation of a living body with a spectrometric system that includes at least one transmitter and at least one receiver, the method comprising:

  • disposing the at least one transmitter on a surface of a region-of-interest (ROI) of the body, the ROI including a peripheral artery, and placing the at least one receiver on the body;

    performing an oximetry measurement to acquire, with a data-processing circuitry of the spectrometric system, a time-dependent output from the at least one receiver caused by the at least one transmitter'"'"'s emission of at least one electromagnetic wave (EMW) at at least one corresponding wavelength,wherein the time-dependent output represents time-dependent changes of a concentration of oxygen in arterial blood of the peripheral artery, of the ROI, determined along a path from the at least one transmitter to the at least one receiver, said path defined by a gradient of the concentration of oxygen in said arterial blood;

    from the time-dependent output, creating a waveform that is a surrogate for a pulse pressure in an aorta; and

    from changes in the waveform, identified as a function of time, determining the beat-to-beat cardiac stroke volume variation.

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