Table 2 Ventilator settings in included studies
| Â | Derdak et al. 2002[12] | Shah et al. 2004[13] | Bollen et al. 2005[14] | Ferguson et al. 2013[18] | Young et al. 2013[17] |
|---|---|---|---|---|---|
HFOV | Â | Â | Â | Â | Â |
  Mean airway pressure | 5 cmH2O above mean airway pressure on CMV | 5 cmH2O above mean airway pressure on CMV | 5 cmH2O above mean airway pressure on CMV | 30 cmH2O | 5 cmH2O above plateau pressure on CMV |
  Frequency, Hz | 5 | 5 | 5 | 3-12 | 10 |
  Amplitude | To achieve chest wall vibration to the level of the midthigh | To achieve chest wall to midthigh vibration | According to PaCO2 and to achieve chest wall vibration | 90 cmH2O | A cycle volume of 100 ml |
CMV | Â | Â | Â | Â | Â |
  Mode | Pressure control ventilation | Pressure control ventilation | Pressure control ventilation | Pressure control ventilation | Pressure control ventilation |
  Tidal volume | 6-10 ml/kg (actual body weight) | A mean of 7-8 ml/kg (ideal body weight) | A mean of 8-9 ml/kg (ideal body weight) | 6 ml/kg (predicted body weight) | 6-8 ml/kg (ideal body weight) |
  Adjustment of PEEP | Study protocol | ARDS Network protocol | Not reported | Lung Open Ventilation Study | ARDS Network protocol |