US 11,937,940 B2
Devices and methods for stress assessment using physiological data
Visit Thaveeprungsriporn, Singapore (SG); Shoko Trepetch, Bangkok (TH); Amornsri Khitwongwattana, Bangkok (TH); Anyamanee Pornpanvattana, Bangkok (TH); and Ananya Chaithanaboon, Bangkok (TH)
Assigned to Nitto Denko Corporation, (JP)
Appl. No. 16/976,933
Filed by Nitto Denko Corporation, Osaka (JP)
PCT Filed Feb. 28, 2019, PCT No. PCT/SG2019/050110
§ 371(c)(1), (2) Date Aug. 31, 2020,
PCT Pub. No. WO2019/168473, PCT Pub. Date Sep. 6, 2019.
Claims priority of application No. 10201801851S (SG), filed on Mar. 2, 2018.
Prior Publication US 2021/0007667 A1, Jan. 14, 2021
Int. Cl. A61B 5/00 (2006.01); A61B 5/024 (2006.01)
CPC A61B 5/4884 (2013.01) [A61B 5/0006 (2013.01); A61B 5/0022 (2013.01); A61B 5/02416 (2013.01); A61B 5/742 (2013.01); A61B 5/746 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wearable measurement device for stress assessment of a user, comprising:
a sensor module comprising a photoplethysmography (PPG) sensor for measuring, from the user, a number of sets of physiological data, each set of physiological data measured during a discrete time period;
a database for storing the physiological data;
a display module comprising a set of graphical user interface (GUI) portions for displaying visual information from the stress assessment based on the physiological data; and
a processor configured for:
determining a stress parameter from each set of physiological data for comparison against a predefined stress reference;
identifying a plurality of stress parameters in a time space having a plurality of consecutive discrete time periods, each stress parameter for one of the time periods, the plurality of stress parameters including a first stress parameter for a current time period ending the time space and one or more earlier stress parameters for one or more earlier time periods before the current time period;
generating a stress alert in response to a determination that predefined stress conditions are satisfied based on a consecutive plurality of stress parameters including the first stress parameter and a second stress parameter for a time period immediately preceding the current time period, wherein the stress conditions are satisfied if each of the first stress parameter and the second stress parameter is indicative of a stress state of the user relative to the predefined stress reference; and
communicating the stress alert to the display module for displaying, on at least one of the GUI portions, the visual information corresponding to the stress alert and assistive to the user in relieving the stress state,
wherein the stress conditions are associated with a stress pattern of the user formed by the plurality of stress parameters in the time space.