Patent RU-2649519-C2 (RU)
Inventor: KURYSHEV VALERIJ VIKTOROVICH
IPC: A61B5/11
Filed: 2016-03-18
Granted: 2018-04-03
Abstract: FIELD: medicine. 
     SUBSTANCE: invention refers to the methods for continuous monitoring of functional status and functional diagnostics. Method involves the use of the biometric detector in the form of a wristwatch or bracelet, the data of which is used to buffer the values of the intervals between the adjacent heartbeats during the given time window, as well as to create the histogram for the distribution of these intervals and calculate the level of stress based on the variability of the heart rate. Biometric detector data are transmitted wired or wirelessly to the mobile application based on the Android or iOS platform and based on the histogram plot data. According to the concentration of the maximum number of intervals Y between the adjacent cardiac contractions in the certain range of X ms the level of stress is determined by the formula: stress level = (Kage*(Y/size of the floating window))*Kscale. Where Y is the number of intervals between the neighboring heart beats with the given deviation from each other - 10, 20 or 50 ms. Kage is the coefficient, which takes into account the correction for age within the range of 0.7…1. Kscale - takes two values: 10 for scales on portable devices and 1000 for scales on mobile devices of the expert systems. Size of the floating window is 128, 256 or 512 heartbeats. Obtained value of stress level indicates the level of tension of the nervous system. At the maximum of the distribution histogram, the zone of the maximum number of intervals Y between the adjacent heart intervals is obtained, which serves as the indicator for selecting the event that determines the cause of stress. Indicators of the intensity of the user's movements are recorded using the electric accelerometer, which is built into the biometric detector, wherein physical activity is assessed either by measuring the number of the steps made by the person in the given time interval, or by means of measuring the amplitude of the acceleration vector of the part of the body, to which the biometric detector is attached, along three axes, where the amplitude of movements is measured as the percentage of - the maximum scale of the accelerometer. Then, according to the distribution of the obtained data in time, conclusions are drawn about the daily motor activity and the way of life of the person. Calculated level of stress is associated with the physical activity of the person and with the person’s interaction with surrounding people and objects according to the data that are collected automatically by means of collecting the information from the applications, which are installed on the user's electronic device. And according to the collected information, the conclusion was made that it was the source of the stress level change, and they offer the user to exclude the specified source. 
     EFFECT: invention allows to increase the reliability and safety of work, the improvement of methods of psycho-emotional self-control of the person, improvement of the quality and informativeness of communicating people in social networks during direct communication. 
     6 cl, 7 dwg