Table 3

Regional area distribution


Upper
Middle
Lower


Mean ± SD
Mean ± SD
Mean ± SD

VC
40.4% ± 6.9%
36.0% ± 3.5%
23.6% ± 9.5%
PC
39.7% ± 6.3%
34.6% ± 3.3%
25.7% ± 8.9%
PS
39.5% ± 5.8%
34.6% ± 3.2%
25.8% ± 8.4%
t test
Upper ↓
Mid ↓
Lower ↑
VC-PC
0.170
0.00001a
0.002a
VC-PS
0.042a
0.0008a
0.004a
PC-PS
0.367
0.8598
0.536

ap < 0.05 indicates a significant difference in area distribution among VC and PS modes in all three regions. VC to PC mean regional area differs in the mid and lower lung regions. Tables 3 and 4 and their corresponding descriptions should be interpreted side by side. PC, assist pressure control; PS, pressure support; SD, standard deviation; VC, assist volume control; ↑ = increase; ↓ = decrease.

Dellinger et al. Critical Care 2007 11:R26   doi:10.1186/cc5706

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