Respiratory analogue computer model.

An analogue computer model has been constructed to simulate the dynamic behaviour of the human cardiorespiratory system for studying the effect of changes in different system-variables--as alveolar ventilation, functional residual capacity (FRC) of the human lung and the cardiac output--on the partial pressure of carbon dioxide in the arterial and mixed venous blood (pCO2a, pCO2v). The respiratory analogue computer model (RACM) simulates reliably well-known clinical physiological as well as pathological phenomena. Reducing FRC or breath rate an oscillation of pCO2a has been developed, but the mean value has not been changed.