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Table 4 Effect of mechanical ventilation with heliox on parameters for gas exchange and dead-space

From: Heliox reduces respiratory system resistance in respiratory syncytial virus induced respiratory failure

 

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

  1. Data are expressed as mean ± standard deviations.
  2. Aa-DO2 = alveolo-arterial oxygen gradient; OI = oxygenation index; VI = ventilation index; VD/VT = dead-space/tidal volume ratio.
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Critical Care

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