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Ventilatory waveform of a patient under assisted ventilation. (A) Flow; (B) airway pressure (Paw); Pmusc index (PMI) is the difference between the plateau pressure (Pplat) and the sum of positive end-expiratory pressure (PEEP) and pressure support (PS) and it represents an index of patient’s elastic workload; (C) esophageal pressure waveform.
