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Table 2 Results

From: Adaptive mechanical ventilation with automated minimization of mechanical power—a pilot randomized cross-over study

Parameter

AVM

AVM2

p value

VT (ml/kg)

8.2 ± 0.6

7.2 ± 0.9

< 0.0001

ΔPstat (cmH2O)

12.6 ± 2.5

11.5 ± 1.6

0.0022

Pinsp (cmH2O)

23.9 ± 3.5

20.7 ± 2.8

< 0.0001

RR (1/min)

12.9 ± 1.7

15.8 ± 2.6

< 0.0001

Mechanical Power (J/min)

18.6 ± 4.6

16.8 ± 3.9

0.0024

A

4.5 ± 0.9

4.6 ± 1.0

0.71

Paw,mean (cmH2O)

14.0 (12.9–14.6)

14.6 (13.6–16.1)

0.0008

Crs (ml/cmH2O)

51.8 ± 12.1

47.7 ± 12.2

0.0043

Rinsp (cmH2O/l/s)

11.1 ± 2.3

10.0 ± 1.7

0.0004

RCe (s)

0.82 ± 0.22

0.83 ± 0.26

0.68

PaO2/FiO2 (mmHg)

291 ± 102

270 ± 98

0.03

PaCO2 (mmHg)

38.4 ± 4.2

39.1 ± 5.8

0.33

pH

7.46 ± 0.07

7.46 ± 0.07

0.37

MAP (mmHg)

84 ± 12

83 ± 12

0.87

HR (1/min)

70 ± 18

71 ± 18

0.42

  1. Parametric data are presented as mean ± standard deviation; nonparametric data are presented as median (interquartile range). p values were calculated using a two-sided paired t test or a Wilcoxon matched-pairs test for parametric and nonparametric data, respectively. VT tidal volume, ΔPstat driving pressure (measured during end-inspiratory occlusion maneuver), Pinsp inspiratory airway pressure (measured during ongoing ventilation), RR respiratory rate, A alveolar minute ventilation, Paw,mean mean airway pressure, Crs static respiratory system compliance, Rinsp inspiratory resistance, RCe expiratory time constant, PaO2/FiO2 ratio of arterial partial pressure of oxygen to inspired fraction of oxygen, PaCO2 arterial partial pressure of carbon dioxide, MAP mean arterial pressure, HR heart rate