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Fig. 2 | Critical Care

Fig. 2

From: Flow Index: a novel, non-invasive, continuous, quantitative method to evaluate patient inspiratory effort during pressure support ventilation

Fig. 2

Airway pressure (Paw), esophageal pressure (Pes) and airflow curves from a study participant. Upper panel: airway pressure (Paw) curve. The inspiratory phase is identified by dashed vertical lines, while the Pressure Time Product of the ventilator (PTPvent) is identified by the blue area, that is calculated as the product of inspiratory pressure (Paw minus positive end expiratory pressure) for the duration of inspiration. Middle panel: esophageal pressure (Pes) curve. The chest wall elastic recoil pressure (Pcw) is identified by a dot-dashed line, while the Pressure Time Product of the patient (PTPpt,breath) is identified by the red area calculated as the product of Pcw minus Pes for the duration of inspiration. The maximum pressure generated by respiratory muscles (Pmusc) is identified by the arrow. Lower panel: inspiratory flow trace

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Critical Care

ISSN: 1364-8535