US 12,150,744 B2
Sensor system and sensing method for use in assessment of circulatory volume
Shaoxiong Sun, Eindhoven (NL); Wouter Herman Peeters, Waalre (NL); Rick Bezemer, Utrecht (NL); Xi Long, Eindhoven (NL); and Ronaldus Maria Aarts, Geldrop (NL)
Assigned to Koninklijke Philips N.V., Eindhoven (NL)
Appl. No. 16/651,568
Filed by KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
PCT Filed Sep. 18, 2018, PCT No. PCT/EP2018/075137
§ 371(c)(1), (2) Date Mar. 27, 2020,
PCT Pub. No. WO2019/063349, PCT Pub. Date Apr. 4, 2019.
Claims priority of application No. 17193449 (EP), filed on Sep. 27, 2017.
Prior Publication US 2020/0260967 A1, Aug. 20, 2020
Int. Cl. A61B 5/026 (2006.01); A61B 5/00 (2006.01); A61B 5/024 (2006.01); A61B 5/029 (2006.01); A61B 5/0295 (2006.01); A61B 5/1455 (2006.01)
CPC A61B 5/0261 (2013.01) [A61B 5/02433 (2013.01); A61B 5/029 (2013.01); A61B 5/0295 (2013.01); A61B 5/6814 (2013.01); A61B 5/6826 (2013.01); A61B 5/725 (2013.01); A61B 5/7278 (2013.01); A61B 5/14552 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sensor system, comprising:
a photoplethysmography (PPG) sensor;
a controller configured to process output signals from the PPG sensor, the controller being adapted to generate a modified pulse amplitude variation value based on:
deriving a baseline variation of the PPG sensor output signal;
deriving a pulse amplitude variation value from the PPG sensor output signal; and
performing a post-adjustment step by which modification is realized in the derived pulse amplitude variation value based on said baseline variation of the PPG sensor output signal, wherein the post-adjustment step comprises:
subsequent to deriving the pulse amplitude variation value, combining the derived baseline variation additively with the derived pulse amplitude variation value to thereby generate the modified pulse amplitude variation value.