US 12,458,268 B2
Bio-signal detection
Antti Salo, Lohja (FI); and Kim Blomqvist, Espoo (FI)
Assigned to Nokia Technologies Oy, Espoo (FI)
Appl. No. 16/761,669
Filed by Nokia Technologies Oy, Espoo (FI)
PCT Filed Nov. 20, 2018, PCT No. PCT/EP2018/081975
§ 371(c)(1), (2) Date May 5, 2020,
PCT Pub. No. WO2019/101754, PCT Pub. Date May 31, 2019.
Claims priority of application No. 17203660 (EP), filed on Nov. 24, 2017.
Prior Publication US 2021/0177334 A1, Jun. 17, 2021
Int. Cl. A61B 5/277 (2021.01); A61B 5/00 (2006.01); A61B 5/021 (2006.01); A61B 5/28 (2021.01)
CPC A61B 5/28 (2021.01) [A61B 5/02108 (2013.01); A61B 5/7225 (2013.01); A61B 2562/0214 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a displacement current sensor configured to measure for a subject one or more sensed electrical signals, wherein the displacement current sensor comprises at least one electrode; and
circuitry configured to process the one or more sensed electrical signals from the displacement current sensor to obtain an electrocardiogram (ECG) signal and a variable impedance signal caused by an arterial pulse wave, wherein the circuitry configured to process the one or more sensed electrical signals to obtain the electrocardiogram signal and the variable impedance signal caused by the arterial pulse wave is configured to measure the variable impedance signal caused by the arterial pulse wave as a modulation of the ECG signal.