US 12,133,721 B2
Pulse-wave signal analysis device, pulse-wave signal analysis method and computer program
Tetsuo Minamino, Kagawa (JP); Kazuhiro Hara, Takamatsu (JP); and Makoto Ishizawa, Kagawa (JP)
Assigned to National University Corporation Kagawa University, Kagawa (JP)
Appl. No. 17/258,582
Filed by National University Corporation Kagawa University, Kagawa (JP)
PCT Filed May 24, 2019, PCT No. PCT/JP2019/020762
§ 371(c)(1), (2) Date Jan. 7, 2021,
PCT Pub. No. WO2020/012793, PCT Pub. Date Jan. 16, 2020.
Claims priority of application No. 2018-131025 (JP), filed on Jul. 10, 2018.
Prior Publication US 2021/0161412 A1, Jun. 3, 2021
Int. Cl. A61B 5/024 (2006.01); A61B 5/00 (2006.01); G16H 40/67 (2018.01); G16H 50/70 (2018.01)
CPC A61B 5/02405 (2013.01) [A61B 5/7225 (2013.01); A61B 5/7257 (2013.01); G16H 40/67 (2018.01); G16H 50/70 (2018.01); A61B 5/02444 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A pulse wave signal analyzer, comprising:
a pulse wave detection unit configured to non-invasively detect a pulse wave signal according to a heartbeat of a living body;
a memory that stores executable instructions; and
a processor configured to execute the instructions such that the processor is configured to:
generate a frequency spectrum by performing a Fourier transform of the pulse wave signal detected by a single operation by the pulse wave detection unit for detecting the pulse wave signal; and
detect a state of atrial fibrillation based on the generated frequency spectrum,
wherein when generating the frequency spectrum, the processor is configured to repeatedly perform the Fourier transform of the pulse wave signal over a predetermined time frame while shifting the predetermined time frame in a range of 0.005 seconds to 0.02 seconds for each repeat of the Fourier transform.