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Low power monitoring systems and method

  • US 9,351,688 B2
  • Filed: 01/29/2013
  • Issued: 05/31/2016
  • Est. Priority Date: 01/29/2013
  • Status: Active Grant
First Claim
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1. A system comprising:

  • light drive circuitry configured to drive an emitter of a pulse oximetry sensor at an average frequency and an average pulse width to cause the emitter to emit light into a tissue of the patient at the average frequency and the average pulse width;

    a processor configured to;

    receive a set of data samples generated by a detector of the pulse oximetry sensor based on the light that passed through the tissue of the patient, wherein the set of data samples are indicative of a physiological signal of the patient, and the average frequency and the average pulse width cause the set of data samples to comprise an average sampling frequency less than twice the Nyquist frequency of the physiological signal;

    construct a waveform representative of the physiological signal based on the set of data samples; and

    calculate a physiological parameter based on the waveform.

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