caa a22 4500 465739636 CHVBK 20180323111805.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF02368416 doi (NATIONALLICENCE)springer-10.1007/BF02368416 Mathematical model of chest wall mechanics: A phenomenological approach [Elektronische Daten] [Shlomo Ben-Haim, Gerald Saidel] A mathematical model of chest wall mechanics, based on a phenomenological approach to force balances, provides a quantitative framework for analyzing many types of chest wall movements by using orthogonal displacement coordinates. The moveable components of the ventilatory system include the rib cage, diaphragm, and abdomen. A distinction is made between the lung-apposed and diaphragm-apposed actions on the rib cage. The model equations are derived from "pressure” balances and geometrical relations of the compartments; the stress-displacement relations are hyperbolic. With this model we simulated stiff and flaccid chest wall behavior under normal and constrained conditions associated with abdominal compression, a Mueller maneuver, and a diaphragmatic isometric inspiration. We also examined situations that produce paradoxical as well as orthodox inspiratory movements. The results of these simulations were quantitatively consistent with available data from the literature. A phenomenon predicted by the stiff-wall model during quasi-static inspiration is that the rib cage displacement is negligible near residual volume, but then increases dramatically with lung volume. Since this mathematical model has a sound physical basis and is more comprehensive than previous models, it can be used to predict and analyze the behavior of the chest wall under a wide variety of circumstances. Pergamon Press plc, 1990 Ventilatory system nationallicence Respiratory mechanics nationallicence Model simulations nationallicence Rib cage nationallicence Static relaxation nationallicence Abdominal compression nationallicence Mueller maneuver nationallicence Diaphragmatic isometric inspiration nationallicence Paradoxical breathing nationallicence Ben-Haim Shlomo Department of Physiology and Biophysics Rappaport Family Institute for Research in the Medical Sciences, Technion-Israel Institute of Technology, 37096, Haifa, Israel aut Saidel Gerald Department of Biomedical Engineering, Case Western Reserve University, 44106, Cleveland, Ohio, USA aut Annals of Biomedical Engineering Kluwer Academic Publishers 18/1(1990-01-01), 37-56 0090-6964 18:1<37 1990 18 10439 https://doi.org/10.1007/BF02368416 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02368416 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ben-Haim Shlomo Department of Physiology and Biophysics Rappaport Family Institute for Research in the Medical Sciences, Technion-Israel Institute of Technology, 37096, Haifa, Israel aut NATIONALLICENCE 700 1- Saidel Gerald Department of Biomedical Engineering, Case Western Reserve University, 44106, Cleveland, Ohio, USA aut NATIONALLICENCE 773 0- Annals of Biomedical Engineering Kluwer Academic Publishers 18/1(1990-01-01), 37-56 0090-6964 18:1<37 1990 18 10439 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer