Non-invasive cuff-free methods of blood pressure measurement are being developed actively that will make measuring in everyday life conditions comfortable. The method offered includes 4 steps: choice of a finger, calculation of a generalized skin option, presetting and measuring. To improve the accuracy of measurements, the finger with the greatest temperature sensitivity was revealed and the value of generalized skin option was defined during the experimental verification. In accordance with the developed algorithm the presetting step is meant to determine the coefficient of proportionality which is necessary for measuring blood pressure. This method enables the increase of accuracy of measurements due to taking into account the adaptation to changes in the ambient temperature and individual skin options.

Keywords: control, blood pressure, temperature, distal phalanges, blood, environment, skin option

Currently, there is a tendency to develop not cuff methods of blood pressure measurement, which reduces discomfort in the measurement and to ensure continuous monitoring of blood pressure. The proposed model allows us to estimate the temperature of the distal phalanges (DPF) and, therefore, blood pressure, both in stationary conditions and during the transients. As a result of experimental verification of the model demonstrated that the average value of the DPF temperature repeats the law of change in mean arterial pressure, and transient changes in temperature during the DPF blood pressure change and the ambient temperature are independent and subject to an exponential law.

Keywords: control, blood pressure, temperature, distal phalanges, blood, environment.