Figure 6. Flow, Paw, and VT waveforms for delivered breaths for a severe disease simulated patient lung model with resistance 50 cmH2O.L-1.s-1 and compliance 10 ml.cmH2O-1 using an AMBU Spur II bag with 10 cmH2O PEEP at A) day zero, and B) after 24 hours of continuous operation.