METHOD FOR DETERMINATION OF ARTERIAL PRESSURE BASED ON DISTAL FINGER PHALANGES TEMPERATURE Russian patent published in 2017 - IPC A61B5/01 A61B5/02 

FIELD: medicine.

SUBSTANCE: temperature of the distal finger phalanges is measured by a sensor (point 1). The systolic P_s and diastolic P_d blood pressure is measured with a standard tonometer. The mean arterial pressure P_ref is calculated. Then, from the thermal imaging image, a region of the finger with low small blood filling (point 2) is found, where the second temperature sensor is located. The temperature at points 1 and 2 is measured within 3 minutes. Based on the measurement results, the average temperature at point 1 and the average temperature at point 2 are calculated. After P_ref calculation, the value is calculated. Further, continuous measurement of temperature at points 1 and 2, as well as heart rate HR(t) is performed. Simultaneously, the following calculations are performed: calculation of the averaged temperature value at point 1 (TFP_av(T)) and at point 2 (TP_av(T)) and calculation of the average blood pressure P_av(T)=[TFP_av(T)-TP_av(T)]⋅K1_prop. After this, based on the values of P_av(T) and HR(t), the systolic P_s(T) and diastolic P_d(T) pressures are calculated using the following system of equations:

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EFFECT: increased accuracy of blood pressure determination by the temperature of the distal finger phalanges due to compensation of the effect of ambient temperature and individual skin parameters.

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