A New Method for Calculating Total Respiratory System Compliance Theory and Model Experiments |
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| Authors: | M DAROWSKI R RUDOWSKI M RAWICZ G HEDENSTIERNA MD |
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| Institution: | Department of Bioflows, Institute of Biocybemetics and Biomedical Engineering, Polish Academy of Science, and Department of Anaesthesiology, National Research Institute of Mother and Child, Warsaw, Poland and Department of Clinical Physiology, Huddinge University Hospital, Huddinge, Sweden |
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| Abstract: | A new method for calculating total respiratory system compliance is described, based on simple modelling of a ventilator-respiratory system circuit that assumes linear characteristics of the circuit parameters compliances and resistances. The method requires only that flow measurement be conducted continuously to obtain compliance, if the internal compliance of the circuit is known beforehand. Model experiments showed that the compliance of a child test lung, calculated from the flow recording, differed at most by 10% from the compliance obtained by separate measurements of pressure and volume under static conditions, over a wide range of respiratory flows and airway resistances. |
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| Keywords: | Airway pressure compliance gas flow Laplace transform mechanical ventilation |
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