The invention relates to medical technology. A method involves registering changes in vascular tone during and after a functional load, and processing data using spectral analysis methods within the frequency ranges of endothelial (0.0095-0.02 Hz), neurogenic (0.02-0.05 Hz), and myogenic (0.05-0.14 Hz) regulation mechanisms. Furthermore, the temperature of an area of a patients skin is continuously registered. During the first 1-2 minutes, the temperature of the examined skin surface is increased to 38-42 °С, and the heating power is fixed. Temperature fluctuations are registered over the course of 10 minutes during which a thermal sample is taken. The heater is shut-off. Over the course of 10 minutes following the shut-off and a decrease in temperature to 30-32°С, temperature fluctuations continue to be registered, and the obtained values are compared, with coefficients being calculated for the relative change in the amplitudes of the temperature fluctuations, which are then used for determining the existence of a disorder in a vascular tone regulation mechanism. An electronic temperature registration device contains an external temperature sensor, provided with a heating unit, an analog-to-digital converter, and a microcontroller for transmitting data to a PC. The temperature registration device contains optocouplers between the heating unit and a measurement circuit, and between the measurement circuit and a PC signal, respectively, and also a power supply unit with a unit for the galvanic isolation of power. The temperature sensor contains a bridge measurement circuit with a thermistor, and a heating unit based on SMD resistors. The invention makes it possible to increase the accuracy and simplify the process of diagnosing disorders of endothelial, neurogenic and myogenic regulation mechanisms of microvascular tone.La présente invention se rapporte aux équipements médicaux. Le procédé consiste à enregistrer les modifications du tonus des vaisseaux pendant et apr
