Key result
Mathematical model of arm tissue compression accurately simulates brachial artery pressure transmission.
A new mathematical model accurately describes arm tissue mechanical behavior under external pressure, which may improve noninvasive blood pressure estimation techniques.
May refine cuff-based BP modeling; leaves open clinical accuracy gains in larger cohorts.
A mathematical model of the arm tissue mechanical behavior under the effect of external pressure loads is presented. The model has been used to study stress and strain distribution across the tissue, and pressure transmission to the brachial artery, when the arm is compressed by two adjacent cuffs independently inflated. Using this configuration, the tissue elastic parameters (Young modulus and Poisson ratio) can be individually identified using a simple and noninvasive experimental procedure. Model validation has been achieved by comparing its results with data obtained experimentally on 10 subjects. These comparisons demonstrate that the proposed model may constitute a simple but valid new tool able to describe tissue behavior, subjected to external pressures, with sufficient accuracy. Joined with a model of brachial hemodynamics, it might contribute to improve our understanding of noninvasive blood pressure estimation techniques.
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Ursino et al. (1995) studied this question. Mathematical model of arm tissue mechanical behavior vs. Experimental data was evaluated on Model validation comparing simulated results with experimental data. A mathematical model of arm tissue mechanical behavior under external pressure loads was successfully validated against experimental data from 10 subjects, demonstrating sufficient accuracy.
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