M.S. Gerashchenko1, A.N. Tynda2, S.I. Gerashchenko3

1–3 Penza State University (Penza, Russia)
1 cts.com@yandex.ru, 2 tynda@pnzgu.ru, 3 mpo@list.ru

For people suffering from hypertension, blood pressure (BP) measurement is an integral part of the therapy. Evaluation of BP values allows us to evaluate the effectiveness of the drugs used and optimize therapy tactics. The practice of using different types of tonometers shows a significant spread in the estimated BP values. Multiple scientific studies based on modeling the processes of arterial occlusion and the transfer of arterial pressure to the occlusion cuff show a significant influence of the mass, elastic, and elastic properties of the artery and tissues involved in the transfer of pulse wave energy. According to various estimates, the increase in arterial pressure can reach 20 ... 28 mm Hg. Currently, a gyro-cuff technology for generating oscillations is being developed [3]. It is based on replacing air with liquid in the occlusion cuff. The practice of using a hydro-cuff shows a significant increase in the amplitude of oscillations. This creates conditions for increasing the accuracy of measuring blood pressure values with oscillator-type tonometers. Obtaining theoretical knowledge about the processes of generating oscillations in hydro-cuff systems is an integral part of developing a methodology and algorithms for assessing blood pressure values and designing automatic tonometers is an urgent task.

This article presents the results of modeling the process of interaction of the artery, tissues and cuff taking into account the replacement of air with liquid. A series of numerical calculations was performed based on a physical model of the shoulder in combination with a hydrocuff. The transfer of the pulse wave energy of the artery to the cuff is carried out due to a change in the stress state in the surrounding tissues. To describe the stress-strain state, physical models of varying complexity are used in the work: the simplest Kelvin-Voigt model, the integral Boltzmann-Volterra model with different kernels, the Maxwell model with fractional derivatives. The obtained results will allow implementing a new concept of creating hydrocuff systems for assessing hemodynamic parameters with improved operational and metrological characteristics.

Gerashchenko M.S., Tynda A.N., Gerashchenko S.I. Evaluation of damping properties of forearm tissues in hydrocuff systems taking into account their anatomical features. Biomedicine Radioengineering. 2025. V. 28. № 5. P. 9–13. DOI: https:// doi.org/10.18127/j15604136-202505-02 (In Russian)

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