Table 4 |
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|
Effect of mechanical ventilation with heliox on parameters for gas exchange and dead-space |
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|
Nitrox (T = 0) |
Heliox (T = 30) |
Nitrox (T = 60) |
Heliox (T = 90) |
Overall p – value |
|
|
|
|||||
|
OI |
7.3 ± 6.0 |
6.8 ± 2.6 |
6.1 ± 2.1 |
6.6 ± 1.0 |
0.477 |
|
Aa-DO2 |
155 ± 135 |
131 ± 33 |
133 ± 68 |
134 ± 28 |
0.507 |
|
VI |
44.8 ± 22.2 |
46.1 ± 22.6 |
48.3 ± 22.6 |
45.2 ± 18.9 |
0.601 |
|
VD/VT |
0.20 ± 0.09 |
0.21 ± 0.11 |
0.20 ± 0.08 |
0.20 ± 0.11 |
0.929 |
|
|
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|
Data are expressed as mean ± standard deviations. Aa-DO2 = alveolo-arterial oxygen gradient; OI = oxygenation index; VI = ventilation index; VD/VT = dead-space/tidal volume ratio. |
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|
Kneyber et al. Critical Care 2009 13:R71 doi:10.1186/cc7880 |
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