Abstract
Normal tidal breathing is generated by cyclic muscular pressure applied to the chest wall. Mechanical ventilation is produced by cyclic pressure applied to the airway opening. In both situations tidal volume generated by the driving pressure is determined by the mechanical load of the respiratory system. In general, for a given driving pressure, higher mechanical load results in lower ventilatory out put. The mechanical load as computed from the pressure-flow relationship of the respiratory system undergoing sinusoidal oscillation is called respiratory impedance (Zrs), because of the complex structure of the respiratory system Zrs varies markedly with oscillatory frequency. Mechanical properties of the airways and the lung and chest wall tissues can be estimated by fitting suitable physiological models to Zrs measured at different frequencies. Therefore, the study of oscillatory mechanics in a wide range of frequencies is of clinical interest in the assessment of respiratory mechanics in spontaneously breathing and mechanically ventilated patients.
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© 1998 Springer-Verlag Italia
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Navajas, D. (1998). Oscillatory mechanics. In: Milic-Emili, J. (eds) Applied Physiology in Respiratory Mechanics. Topics in Anaesthesia and Critical Care. Springer, Milano. https://doi.org/10.1007/978-88-470-2928-6_21
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DOI: https://doi.org/10.1007/978-88-470-2928-6_21
Publisher Name: Springer, Milano
Print ISBN: 978-88-470-2930-9
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