Hypersaturation index
View Patent ↗Embodiments of the present disclosure provide a hypersaturation index for measuring a patient's absorption of oxygen in the blood stream after a patient has reached 100% oxygen saturation. This hypersaturation index provides an indication of the partial pressure of oxygen of a patient. In an embodiment of the present invention, a hypersaturation index is calculated based on the absorption ratio of two different wavelengths of energy at a measuring site. In an embodiment of the invention, a maximum hypersaturation index threshold is determined such that an alarm is triggered when the hypersaturation index reaches or exceeds the threshold. In another embodiment, an alarm is triggered when the hypersaturation index reaches or falls below its starting point when it was first calculated.
1. A method of determining an increase in an amount of oxygen in a body of a patient, where the increase occurs after the patient has reached a 100% oxygen saturation value, and displaying the increase to a patient care provider for use in treating the patient in real time, the method comprising:
emitting light of at least a first and second wavelength of light from a light emitter into the body of the patient;
detecting the light after attenuation of the body, wherein the detected attenuation of the light is indicative of a physiological condition of the body of the patient;
determining at least a first ratio of a detected measure of an attenuation of the first wavelength to a detected measure of an attenuation of the second wavelength;
using the first ratio to determine an oxygen saturation level;
using the detected measures of the attenuations of the first and second wavelengths of light to determine the increase in the amount of oxygen in the body of the patient where the increase occurs after the patient has reached a 100% oxygen saturation measurement; and
displaying, using a displayed measurement separate from said oxygen saturation measurement, an indication that oxygen levels in the body of the patient continue to increase beyond a 100% oxygen saturation measurement.
2. The method of claim 1 , wherein the indication of rising oxygen levels is an oxygen hypersaturation index.
3. The method of claim 2 , wherein the hypersaturation index is an indication of the partial pressure of oxygen.
4. The method of claim 2 , wherein the displaying of the indication of rising oxygen levels comprises displaying a graph of an oxygen hypersaturation index.
5. The method of claim 1 , wherein the displaying of the indication of rising oxygen levels comprises generating an alarm in response to the indication of rising oxygen levels exceeding a threshold.
6. A system for determining an amount of oxygen reserves in the body of a patient after a patient's hemoglobin is fully saturated with oxygen, the system comprising:
at least one light emitter emitting light of at least a first and second wavelength of light into the body of the patient;
a light detector detecting the light after attenuation of the body, wherein the detected attenuation of the light is indicative of a physiological condition of the body of the patient and providing a signal indicative of the detected light;
a physiological hardware processor specially configured to receive and determine measures of the attenuation of the light of the at least first and second wavelengths of light and further specially configured to determine at least a first ratio of the measure of an attenuation of the first wavelength to a measure of an attenuation of the second wavelength, the processor further specially configured to determine an oxygen saturation level using the first ratio;
wherein, the processor is further specially configured to use the measures of the attenuations of the first and second wavelengths of light to determine the increase in the amount of oxygen in the body of the patient where the increase occurs after the patient has reached a 100% oxygen saturation measurement; and
a display which displays an indication of the determined increase in the amount of oxygen in the body of the patient where the increase occurs after the patient has reached a 100% oxygen saturation measurement, wherein the displayed indication is separate from any displayed oxygen saturation measurements.
7. The system of claim 6 , wherein the indication of rising oxygen levels is an oxygen hypersaturation index.
8. The system of claim 7 , wherein the hypersaturation index is an indication of the partial pressure of oxygen.
9. The system of claim 7 , wherein the displaying of the indication of rising oxygen levels comprises displaying a graph of an oxygen hypersaturation index.
10. The system of claim 6 , wherein the displaying of the indication of rising oxygen levels comprises generating an alarm in response to the indication of rising oxygen levels exceeding a threshold.