METHOD FOR COMPLEX ASSESSMENT OF ARTERIAL BED STATE Russian patent published in 2020 - IPC A61B5/295 A61B5/1455 G06F17/14 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to a method for complex estimation of arterial bed state. Finger area is irradiated with a light signal of the red and infrared wavelength ranges. Ambient temperature and temperature of the finger area to be recorded are pre-stabilized and the clamp of the emitters and the photodetector to the finger is adjusted. Photoplethysmographic (PPG) signal is recorded for at least 5 minutes. PPG signal is contoured by signal filtration by Savitzky–Golay method with 64 ms window width and obtaining the fourth signal derivative. Direct and reflected wave of PPG signal is detected from the artery wall. Arterial stiffness is determined on the basis of time interval between direct and reflected waves and on the basis of their amplitudes. Complex continuous wavelet transformation of the PPG signal is carried out using a Morlet basis wavelet and generating a wavelet spectrum. Peak location of PPG signal power in the wavelet spectrum is determined. State of the microcirculatory bed is assessed by the arrangement of peaks in the frequency ranges corresponding to the microvascular tonus regulation mechanism.

EFFECT: invention provides accuracy, simplicity, reliability and reduced time for examination with integrated assessment of vascular bed for early diagnosis of widespread diseases - arterial hypertension and diabetes, in pathogenesis of which damage of arterial bed is of primary importance.

5 cl, 4 ex, 16 dwg