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Hypersaturation index

  • US 9,775,546 B2
  • Filed: 09/11/2015
  • Issued: 10/03/2017
  • Est. Priority Date: 04/17/2012
  • Status: Active Grant
First Claim
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1. A method of providing an indication of an oxygenation of blood of a non-invasively monitored patient different from oxygen saturation, wherein said oxygen saturation is a measure of a percentage of available carriers in the blood that are bound to oxygen molecules at a time of measurement acquisition, the method comprising:

  • using an electronic light source including one or more light emitters, emitting at least a plurality of wavelengths of light into a portion of a body of the patient;

    using an electronic light detector, detecting the light after attenuation of the body, said attenuation responsive to said oxygenation of said blood, and outputting one or more signals from said light detector, said one or more signals responsive to said attenuation;

    processing said one or more signals using one or more signal processors to electronically;

    calculate a first index responsive to said percentage of said carriers bound to oxygen, said first index being said measure of said oxygen saturation, andcalculate a second index responsive to a quantity of oxygen dissolved in the blood of a patient and not bound to any of said carriers while the patient is in a hyperoxic state, said second index providing different information to a caregiver than said first index, wherein said second index is calculated based on a ratio of information from at least a first of the plurality of wavelengths and information from at least a second of the plurality of wavelengths during the hyperoxic state of the patient; and

    electronically displaying at least a value responsive to said second index.

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