Patent ID: 11918351
Assignee: MEDTRONIC MONITORING, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 13:
14. A method performed by a medical device comprising processing circuitry and being configured to determine a hemoglobin concentration level, the method comprising:
providing incident light, by one or more light sources of the medical device, to patient tissue at a first excitation wavelength;
monitoring emissions, by one or more photodetectors of the medical device, in response to the first excitation wavelength at an emission wavelength;
providing incident light, by the one or more light sources, to the patient tissue at a second excitation wavelength;
monitoring emissions, by the one or more photodetectors, in response to the second excitation wavelength at the emission wavelength; and
determining, by the processing circuitry, a hemoglobin concentration level based on a ratio of emissions at the emission wavelength monitored in response to the first excitation wavelength and emissions at the emission wavelength monitored in response to the second excitation wavelength.