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Annals of Intensive Care

Table 2 Parameters comparison at baseline and 2 h after the PEEP titration

From: Positive end-expiratory pressure titration with electrical impedance tomography and pressure–volume curve in severe acute respiratory distress syndrome

Parameters

EIT group

Control group

P value (between groups)

Baseline

 PaO2/FiO2 (mmHg)

71.7 ± 16.6

69.7 ± 15.9

0.66

 APACHE II

23.2 ± 6.4

23.5 ± 6.9

0.89

 PEEP (cmH2O)

13.5 ± 1.9

11.5 ± 3.8

0.07

 Vt (ml/kg)

6.0 ± 0.8

6.3 ± 1.1

0.27

 Pdriv (cmH2O)

22.5 ± 2.2

23.0 ± 3.1

0.54

 Pplat (cmH2O)

35.9 ± 0.9

34.4 ± 2.4

< 0.01§

 Crs (ml/cmH2O)

16.0 ± 1.8

16.0 ± 2.9

0.91

2 h after (except APACHE II)

 PaO2/FiO2 (mmHg)

163.7 ± 70.1*

160.0 ± 77.8*

0.86

 APACHE II (24 h)

20.6 ± 5.3*

22.7 ± 8.6

0.31

 PEEP (cmH2O)

17.6 ± 3.6*

13.6 ± 3.6*

< 0.01§

 Vt (ml/kg)

6.3 ± 0.8

6.5 ± 1.2

0.59

 Pdriv (cmH2O)

15.1 ± 3.1*

19.1 ± 3.7*

< 0.01§

 Pplat (cmH2O)

32.7 ± 2.6*

32.6 ± 2.7*

0.98

 Crs (ml/cmH2O)

25.9 ± 5.9*

20.4 ± 5.3*

< 0.01§

  1. PaO2/FiO2: ratio of arterial partial pressure of oxygen and fraction of inspired oxygen, APACHE: acute physiology and chronic health evaluation, Vt: tidal volume per kilogram predicted body weight, Pdriv: driving pressure, Pplat: plateau pressure, Crs: respiratory system compliance
  2. Significant differences compared to baseline values within each group are marked with * (P < 0.01). Significant differences between group are marked with §
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