METHOD OF MEASURING ARTERIAL PRESSURE BY KOROTKOV METHOD AND DEVICE FOR ITS REALISATION Russian patent published in 2015 - IPC A61B5/225 

FIELD: medicine.

SUBSTANCE: group of inventions relates to medicine, namely to cardiology. A microphone signal, simultaneously passing through two band filters with fixed pass bands, is registered. The pass band of the first pulse-wave filter is set at 3-6 Hz. The pass band of the second filter of Korotkov′s tones is set at 40-120 Hz. Reliable Korotkov′s tones in the determination of systolic pressure are considered to be exceeding of a threshold value of the amplitude of the first filter output signal after the local maximum of the output signal of the first filter. The reliable Korotkov′s tones in the determination of diastolic pressure are considered to be exceeding the threshold value of the amplitude of the output signal of the second filter to the local maximum of the first filter output signal. The claimed method is realised due to the device, which includes an air pressure sensor in a cuff, a microphone, the first pulse-wave filter has the pass band of 3-4 Hz, the second filter of the Korotkov′s tones has the pass band of 40-120 Hz, a unit for the determination of maximal values of output signals of the filters, a unit for the selection of the threshold values of comparison of the output signals of the filters, a unit for the comparison of the output values of the output signals of the filters with the threshold values, a unit for the comparison of the moment when the threshold value of the output signal of the second filter is exceeded, with the moment of achieving the local maximum of the first filter.

EFFECT: group of inventions makes it possible to increase the reliability of measurements due to the reduction of the impact of external noise and interference, conditioned by the patient's physiological activity.

2 cl, 2 dwg