US 12,290,344 B2
Apparatus and method for estimating blood pressure
Chang Soon Park, Suwon-si (KR); Ui Kun Kwon, Suwon-si (KR); Young Soo Kim, Suwon-si (KR); and Hye Rim Lim, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Mar. 31, 2023, as Appl. No. 18/129,396.
Claims priority of application No. 10-2022-0164219 (KR), filed on Nov. 30, 2022.
Prior Publication US 2024/0172945 A1, May 30, 2024
Int. Cl. A61B 5/021 (2006.01); A61B 5/00 (2006.01); A61B 5/024 (2006.01); A61B 5/029 (2006.01)
CPC A61B 5/02116 (2013.01) [A61B 5/029 (2013.01); A61B 5/7239 (2013.01); A61B 5/7246 (2013.01); A61B 5/7278 (2013.01); A61B 5/02416 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An apparatus for estimating blood pressure, the apparatus comprising:
a photoplethysmogram (PPG) sensor configured to measure a PPG signal from a user; and
a processor configured to:
extract a cardiovascular feature from the PPG signal;
calculate a first variation in the extracted cardiovascular feature compared to a reference cardiovascular feature measured at a reference time;
determine a measurement posture of the PPG signal based on a time interval between two waveform components of the PPG signal;
in response to the measurement posture corresponding to a reference posture, estimate the blood pressure based on the first variation; and
in response to the measurement posture not corresponding to the reference posture, calculate a correction value by multiplying an absolute value of the first variation by a predetermined coefficient, obtain a second variation by subtracting the correction value from the first variation, and estimate blood pressure based on the second variation.