CPC A61B 5/14552 (2013.01) [A61B 5/0205 (2013.01); A61B 5/14551 (2013.01); A61B 5/7282 (2013.01); A61B 5/7405 (2013.01); A61B 5/743 (2013.01); A61B 5/746 (2013.01); A61B 5/6826 (2013.01); A61B 2562/0238 (2013.01); A61M 2230/205 (2013.01)] | 21 Claims |
1. A method for non-invasively monitoring a blood oxygen level of a patient during an intubation procedure, the method comprising:
administering air with a first oxygen concentration to the patient to breathe to transition the patient to a hyperoxic state prior to the intubation procedure;
commencing the intubation procedure by stopping administration of air with the first oxygen concentration to the patient to breathe;
using a physiological hardware processor:
receiving, from one or more detectors, light signals of at least first and second wavelengths after attenuation by the patient's body, the one or more detectors configured to output the signals responsive to detection of light emitted by one or more light emitters;
calculating a hypersaturation level of the patient based on at least a ratio of the signals using the at least first and second wavelengths;
monitoring a trend in the ratio of the signals;
detecting an inflection point in the trend of the ratio when the ratio begins to decrease indicating that air with the first oxygen concentration is being administered to the patient to breathe and that the patient is transitioning to the hyperoxic state;
in response to detecting the inflection point:
determining a base hypersaturation index value; and
determining a maximum hypersaturation index value; and
indicating the hypersaturation level of the patient during the intubation procedure while the patient transitions from a hyperoxic state to a normoxic state or hypoxic state.
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