Table 2 Resistive MW of ventilation (cmH2O.L) assuming different flow waveforms, i.e., decelerating, square and sinusoidal, with three levels of tidal volumes
From: The effects of pressure- versus volume-controlled ventilation on ventilator work of breathing
Inspiratory flow waveform | VT = 0.5 L | VT = 1 L | VT = 2 L |
|---|---|---|---|
Decelerating | Total 2.81 ETT 1.32 Tissues 0.89 Airways 0.60 | Total 14.55 ETT 8.60 Tissues 3.43 Airways 2.52 | Total 84.72 ETT 59.88 Tissues 13.27 Airways 11.57 |
Square | Total 2.31 ETT 1.01 Tissues 0.78 Airways 0.52 | Total 12.64 ETT 7.20 Tissues 3.16 Airways 2.28 | Total 77.70 ETT 54.21 Tissues 12.65 Airways 10.84 |
Sinusoidal | Total 3.20 ETT 1.57 Tissues 0.97 Airways 0.66 | Total 18.39 ETT 11.50 Tissues 3.90 Airways 2.99 | Total 118.18 ETT 87.77 Tissues 15.62 Airways 14.79 |