Patent ID: 11911185
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 16:
17. An apparatus for estimating blood pressure of a user, the apparatus comprising:
a photoplethysmography (PPG) sensor configured to acquire a PPG signal of the user; and
a processor configured to:
extract, from the acquired PPG signal, a cardiac output (CO) feature value and a total peripheral resistance (TPR) feature value of the user;
adaptively determine a scale factor such that the scale factor varies depending on the CO feature value and the TPR feature value of the user; and
estimate the blood pressure of the user based on the adaptively-determined scale factor and the CO feature value and the TPR feature value of the user,
wherein the adaptively-determined scale factor varies between a minimum value and a predetermined value greater than the minimum value when at least one of the CO feature value and the TPR feature value of the user is within a threshold range, and the minimum value is greater than 0, and
wherein the processor is further configured to simultaneously estimate the blood pressure while the PPG sensor performs a PPG signal measurement.