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A versatile software for dynamic generation of physiological model systems is proposed. Via a graphical user interface the user can choose and combine models of varying abstraction level and complexity from the following three model families: respiratory mechanics, gas exchange and cardiovascular dynamics. Tests of different simulation runs showed results and model delay times consistent with human...
Special design flow calibrators are used for calibration of mechanical ventilators and lung simulators. It is necessary that these calibrators are connected to traceability chain via national standards. Mathematical models explaining the respiratory mechanics should be analyzed carefully before designing such a reference system for the purpose of calibration of flow calibrators. The purpose is to...
A widely discussed problem in mechanical ventilation is that of modifying the inspiratory flow (VI) pattern during mechanical ventilation. This theoretical study uses a bicompartimental model to determine the VI pattern, optimizing the peak airway pressure, mean inspiratory airway pressure and distribution of ventilation. The optimization is carried out using the current model of the patient's lung...
For pt.I see ibid., vol.35, no.6, p.450-7, June 1988. The model of the lung described in pt.I is presented in terms of analog computer components. This permits the quantitative evaluation of the model even when it is nonlinear and analytically insoluble. This property is used for the evaluation of the multiple-gas effect and for the determination of conditions under which the effect may be neglected...
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