Table 2

Ventilatory measurements at baseline and during conventional ventilation and open lung ventilation

Baseline
 Conventional mechanical ventilation
 Open lung ventilation
Intrinsic + extrinsic positive end-expiratory pressure (cmH2O)
 5 ± 0.4
 6 ± 0.3
 14 ± 0.6*,**
Peak inspiratory airway pressure (cmH2O)
 20 ± 0.5
 28 ± 1**
 26 ± 0.4**
Tidal volume (ml)
 271 ± 5
 270 ± 6
 240 ± 11*,**
PaO2/FiO2 (kPa)
 60 ± 5
 13 ± 2
 72 ± 2*
-1000 HU to -600 HU (%)
 51 ± 3
 10 ± 2**
 29 ± 3*,**
-600 HU to -200 HU (%)
 29 ± 2
 36 ± 2
 57 ± 3*,**
-200 HU to +200 HU (%)
 20 ± 2
 52 ± 3**
 13 ± 2*

HU, Houndsfield units, expressed as the percentage of the lung area. *P < 0.05 versus conventional mechanical ventilation, **P < 0.05 versus baseline.

Reis Miranda et al. Critical Care 2006 10:R86   doi:10.1186/cc4944