Fig. 2

Recording of airway pressure (Paw), muscle pressure (Pmus), distending pressure by equation motion (PDist_EM), Flow, and Volume of representative patients during the ventilatory strategies applied. A: Patient 2, High level of PSV. B: BIPAP, where the effort and work is higher at lower pressure level. C: Patient 4, APRV. Note that respiratory drive and muscle effort parameters, are higher in all ventilatory modes, regardless the elatance of respiratory system (Ers)