System and method for blood typing using PPG technology
AssigneeSanmina Corporation
InventorRobert Steven Newberry
Life of this patent
Estimating the term…
Abstract
A biosensor identifies a blood type using photoplethysmography (PPG) technology. A PPG circuit obtains a plurality of spectral responses at a plurality of wavelengths detected from skin of a user. A processing circuit determines a blood factor indicator using the plurality of spectral responses. The blood factor indicator may include a signal quality parameter or a ratio R value. A calibration database includes a correlation of the blood factor indicator to a plurality of blood types. The blood type of the user is identified using the blood factor indicator and the calibration database.
Claims19
A biosensor, comprising:
- an optical sensor circuit configured to obtain a plurality of spectral responses at a plurality of wavelengths detected from skin of a user;
- a processing circuit configured to:
- obtain a blood type of a user;
- determine a first ratio R value using a first spectral response and a second spectral response of the plurality of spectral responses;
- access a calibration database for the blood type of the user, wherein the calibration database associates predetermined ratio R values to patient vitals for each of a plurality of blood types;
- and
- obtain a patient vital of the user using the first ratio R value, the calibration database and the blood type of the user.
A device, comprising:
- an optical sensor circuit configured to obtain a plurality of spectral responses at a plurality of wavelengths detected from skin of a user;
- a memory device configured for storing correlations between a plurality of R values and a patient vital for each of a plurality of blood types, wherein the correlations are different between the plurality of R values and the patient vital for at least two of the plurality of blood types;
- a processing circuit configured to:
- obtain a blood type of the user;
- determine a first ratio R value using a first spectral response and a second spectral response;
- and
- access the memory device to obtain a correlation between the first ratio R value and the patient vital for the blood type of the user.
A pulse oximeter, comprising:
- an optical sensor circuit configured to obtain a plurality of spectral responses at a plurality of wavelengths detected from skin of a user;
- a memory device configured to store oxygen saturation levels and associated ratio R values for a plurality of blood types, wherein the oxygen saturation levels are different for the associated ratio R values for at least two different blood types of the plurality of blood types;
- and
- a processing circuit configured to:
- obtain a blood type of a user;
- determine a first ratio R value using a first spectral response and a second spectral response;
- and
- accessing the memory device and using the first ratio R value and the blood type of the user to determine an oxygen saturation level for the user.
Dependencies are inferred from the claim text.