An interpretation of asynchronism in non-sequential ventilation (apical and basal regions of the lung)

Non-sequential asynchronous ventilation is interpreted by a variation of velocity of fluid at a given level of bronchial tree based on a physical model already published (Chauvet and Tuchais, 1976). The possible different causes of this variation of velocity are examined. A complete study of apical and basal regions of the lung is made and it shows the influence of some factors (phase difference, amplitude, respiratory frequency) on the regional variations of alveolar pressure.