METHOD FOR REAL-TIME DETERMINATION OF OPERATOR'S VEGETATION INDEX AND DEVICE FOR IMPLEMENTING IT Russian patent published in 2014 - IPC A61B5/02 

FIELD: medicine.

SUBSTANCE: group of inventions refers to medicine. The method is implemented by generating an electric cardiosignal. Diastolic pressure (D) and an electric cardiosignal sampling are determined. An analysis window 0.4-0.5 s long is formed and moved along the signal at a pace equal to the electric cardiosignal sampling interval. Each pace involves determining statistical expectation and dispersion related to the statistical expectation in the window, and the dispersion related to the statistical expectation of each pace of the window is determined. Two variation coefficients are calculated for each pace, and a difference is calculated. The derived value is compared to a threshold of 0.5-1, and a threshold exceedance number (n1) is calculated. Then, a clock pulse, the frequency of which is equal to the electric cardiosignal sampling frequency is formed, and these pulses are counted (n2). Thereafter, n1 and n2 are related, and the derived value is divided by D. This value is transformed into a vegetation index by formula: $$VI=\left(1-\frac{D}{n1/n2}\right)\cdot 100\%.$$ A device for implementing the method comprises a diastolic pressure meter, a filter, a clock pulse generator, two counters, two dispersion calculators, a statistical expectation calculator, two variation coefficient calculators, a subtracter, a threshold generator, a comparator, two dividers, and a vegetation index evaluator.

EFFECT: group of inventions can provide the more reliable and accurate real-time determination of the operator's vegetation index and the based assessment of the functional state, having QRS cardiac complexes different from standard.

2 cl, 2 dwg