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Table 1 Distribution of tidal ventilation, tidal recruitment gas and nonaerated lung tissue in apical slice

From: Spontaneous breathing with airway pressure release ventilation favors ventilation in dependent lung regions and counters cyclic alveolar collapse in oleic-acid-induced lung injury: a randomized controlled computed tomography trial

Region

Mode

Tidal ventilation (% of tidal volume)

Tidal recruitment (% of total lung volume)

Gas volume (% of contained gas)

Nonaerated lung tissue (% of total lung volume)

Nondependent

SB-

46 ± 13

0.1 ± 0.2

56 ± 12

0.3 ± 0.6

 

SB+

33 ± 31

0.0 ± 0.2

56 ± 6

0.4 ± 0.7

Dependent

SB-

54 ± 13

1.7 ± 1.9

44 ± 12

13.8 ± 14.1

 

SB+

67 ± 31

0.5 ± 1.7

44 ± 6

8.6 ± 12.3

Interaction, region × ventilatory mode

 

ns

ns

ns

ns

  1. Dependent and nondependent region of interest on transverse computed tomography scan (see Figure 1, center for details). SB-, airway pressure release ventilation without spontaneous breathing; SB+, airway pressure release ventilation with spontaneous breathing; ns, not significant.