US 11,937,902 B2
Blood pressure estimation device, blood pressure estimation method, computer program, and storage medium
Etsunori Fujita, Higashihiroshima (JP); Masao Yoshizumi, Hiroshima (JP); Yumi Ogura, Higashihiroshima (JP); Kanako Takaichi, Aki-gun (JP); Shinichiro Maeda, Aki-gun (JP); and Yoshika Nobuhiro, Aki-gun (JP)
Assigned to DELTA TOOLING CO., LTD., Hiroshima (JP); and HIROSHIMA UNIVERSITY, Higashihiroshima (JP)
Appl. No. 16/961,875
Filed by DELTA TOOLING CO., LTD., Hiroshima (JP); and HIROSHIMA UNIVERSITY, Higashihiroshima (JP)
PCT Filed Jan. 11, 2019, PCT No. PCT/JP2019/000800
§ 371(c)(1), (2) Date Jul. 13, 2020,
PCT Pub. No. WO2019/139155, PCT Pub. Date Jul. 18, 2019.
Claims priority of application No. 2018-003887 (JP), filed on Jan. 13, 2018.
Prior Publication US 2020/0383588 A1, Dec. 10, 2020
Int. Cl. A61B 5/00 (2006.01); A61B 5/021 (2006.01); A61B 5/026 (2006.01); A61B 5/316 (2021.01); A61B 5/318 (2021.01)
CPC A61B 5/02108 (2013.01) [A61B 5/026 (2013.01); A61B 5/316 (2021.01); A61B 5/318 (2021.01); A61B 5/6823 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A blood pressure estimation method comprising:
receiving a biological signal from a biological signal measurement device configured to contact with a dorsal part of a person to capture the biological signal propagated through a body surface of the dorsal part in a non-constraining manner;
filtering, with a predetermined frequency band, a biological signal time-series waveform of the biological signal into a filter-processed waveform in which a cardiac cycle is manifested;
collating the filter-processed waveform with cardiogram waveform data measured simultaneously with the received biological signal and obtained from a cardiograph, specifying a waveform component in a range of the biological signal time-series waveform from a ventricular filling period to isovolumetric systole in the filter-processed waveform, and finding an index regarding vibration ascribable to a blood flow rate change in a period from the ventricular filling period to the isovolumetric systole;
finding an index time-series waveform of the index regarding the vibration ascribable to the blood flow rate change and thereafter finding an index regarding fluctuation indicating a change in the found time-series waveform; and
estimating a blood pressure of the person based on the index regarding the fluctuation by using correlation data for the blood pressure estimation which is stored in a storage unit in advance and shows a relation between the index regarding the fluctuation and the blood pressure estimation.