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Optical-based physiological monitoring system

  • US 9,833,152 B2
  • Filed: 11/09/2016
  • Issued: 12/05/2017
  • Est. Priority Date: 09/17/2009
  • Status: Active Grant
First Claim
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1. A physiological monitoring method comprising:

  • receiving, from a non-invasive optical sensor comprising an emitter configured to emit light into a tissue site of a living patient and a detector configured to detect the emitted light after attenuation by the tissue site, a first sensor signal responsive to the light detected by the detector;

    receiving, from one or more bio-potential sensors configured to be attached to the patient, at least a second sensor signal and a third sensor signal;

    receiving, from an additional sensor configured to be attached to the patient, at least a fourth sensor signal;

    determining, by a processor and based on the first sensor signal, a first physiological parameter indicative of a level of pain of the patient, wherein the first physiological sensor comprises a perfusion index;

    determining, by the processor and based on the second sensor signal, a second physiological parameter indicative of the level of pain of the patient, wherein the second physiological parameter comprises an ECG;

    determining, by the processor and based on the third sensor signal, a third physiological parameter indicative of a depth of consciousness of the patient, wherein the third physiological parameter comprises an EEG;

    determining, by the processor and based on at least one of the first sensor signal, the second sensor signal, the third sensor signal, or the fourth sensor signal, a plurality of additional physiological parameters indicative of at least one of the level of pain of the patient or the depth of consciousness of the patient, wherein the plurality of additional physiological parameters include at least one of a respiration rate, a respiratory air flow, a heart rate, or a blood pressure; and

    determining, by the processor and based on the first physiological parameter, the second physiological parameter, the third physiological parameter, and the plurality of additional physiological parameters, a combined index indicative of both the level of pain and the depth of consciousness of the patient.

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