Measuring psychological stress from cardiovascular and activity signals
US9307908B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2012 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Aug 31, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/4884
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and system for measuring psychological stress disclosed. In a first aspect, the method comprises determining R-R intervals from an electrocardiogram (ECG) to calculate a standard deviation of the R-R intervals (SDNN) and determining a stress feature (SF) using the SDNN. In response to reaching a threshold, the method includes performing adaptation to update a probability mass function (PMF). The method includes determining a stress level (SL) using the SF and the updated PMF to continuously measure the psychological stress. In a second aspect, the system comprises a wireless sensor device coupled to a user via at least one electrode, wherein the wireless sensor device includes a processor and a memory device coupled to the processor, wherein the memory device stores an application which, when executed by the processor, causes the processor to carry out the steps of the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.