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Schematic representation of airway pressure (Paw) and oesophageal pressure (Poeso) and airflow (V) modifications during triggered inspiratory breathing. There is a consistent time delay between the onset of Poeso and Paw deflection and the moment when the expiratory flow reaches zero. During mechanically assisted breathing an important part of the inspiratory effort is used, in the presence of PEEPi, to reset the alveolar pressure and to stop expiratory flow.
