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Table 5 Comparison of respiratory variables at admission between survivors and non-survivors.

From: Analysis of ventilatory ratio as a novel method to monitor ventilatory adequacy at the bedside

 

Survivors

(n= 154)

Non-survivors

(n= 60)

P values

Minute ventilation (l.min-1)

7.7 ± 2.2

8.7 ± 3.3

< 0.01

PaCO2 (kPa)

5.5 ± 1.3

5.8 ± 1.6

0.22

Ventilatory ratio

1.32 ± 0.5

1.55 ± 0.6

< 0.01

PaO2 (kPa)

17.0 ± 6.4

18.5 ± 11.0

0.22

FiO2

0.54 ± 0.21

0.65 ± 0.23

< 0.01

PaO2/FiO2 ratio

36.2 ± 18

31.4 ± 17.6

0.08

PEEP (cmH2O)

5 (5 -10)

8 (5 - 10)

< 0.01*

Peak inspiratory pressure (cmH2O)

21 (16 - 26)

23 (18.25 - 30.75)

< 0.01*

Dynamic compliance

46.0 ± 29.9

38.6 ± 23.8

0.09

  1. P values are for unpaired t test for continuous variables; *Mann-Whitney test. PaCO2, partial pressure of carbon dioxide in arterial blood; PaO2, partial pressure of oxygen in arterial blood; FiO2, fractional concentration of inspired oxygen; PEEP, positive end-expiratory pressure.
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Critical Care

ISSN: 1364-8535