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Figure 1: Work of breathing bar during proportional assist ventilation + mode operation in Puritan Bennett 840 ventilator (Galway, Ireland) (work of breathing [WOB], WOBPT — Patient WOB; WOBTOT — Total WOB)

Figure 1: Work of breathing bar during proportional assist ventilation + mode operation in Puritan Bennett 840 ventilator (Galway, Ireland) (work of breathing [WOB], WOB<sub>PT</sub> — Patient WOB; WOB<sub>TOT</sub> — Total WOB)