Table 1 Spontaneous breathing simulation and ventilator settings
From: Imposed work of breathing during high-frequency oscillatory ventilation: a bench study
Newborn | Infant | Small child | Large child | Adult | |
|---|---|---|---|---|---|
Assumed weight (kg) | 3.5 | 10 | 25 | 40 | 70 |
Spontaneous breathing simulation | |||||
Respiratory rate (/min) | 35 | 30 | 25 | 20 | 12 |
Tidal volume (ml/kg)/peak inspiratory flow (l/min) | 5/2.6 | 5/6.3 | 5/13 | 5/17 | 5/18 |
7/3.6 | 7/8.9 | 7/19 | 7/24 | 7/25 | |
10/5.1 | 10/12 | 10/27 | 10/34 | 10/36 | |
Inspiratory/expiratory ratio | 1:2 | ||||
Ventilator settings | |||||
HFOV ventilator | 3100 A | 3100 A | 3100 B | 3100 B | 3100 B |
Tube inner diameter (mm) | 3.0, 3.5, 4.0 | 4.0, 4.5, 5.0 | 5.5, 6.0, 6.5 | 6.5, 7.0, 7.5 | 7.5, 8.0, 8.5 |
Fresh gas flow rate (l/min) | 15/20 | 20/40 | 20/60 | 20/60 | 20/60 |
Continuous distending pressure (cmH2O) | 18 | 25 | 25 | 25 | 25 |
Proximal pressure amplitude (cmH2O) | 35 | 50 | 50 | 50 | 50 |
Oscillation frequency (Hz) | 10 | 8 | 8 | 6 | 6 |