Table 2 Respiratory variables during the five different weaning tests and 20 minutes after extubation

0.90 ± 0.2

0.93 ± 0.23

0.82 ± 0.24

0.84 ± 0.28

0.81 ± 0.3

0.89 ± 0.43

2.6 ± 0.8

2.4 ± 0.6

2.2 ± 0.6

2.1 ± 0.6

2.1 ± 0.6

2.2 ± 0.8

35.7 ± 3.6

38.7 ± 4.2

37.8 ± 4.2

39.3 ± 4.4

38.7 ± 4.7

40.8 ± 4.3

0.43 ± 0.12

0.41 ± 0.1

0.38 ± 0.1

0.37 ± 0.1

0.35 ± 0.1

0.36 ± 0.1

25 ± 6

26 ± 7

29 ± 6

30 ± 8

31 ± 7

30 ± 8

64.5 ± 26.8

69.7 ± 25.0

83.1 ± 34.4

87.8 ± 36.4

94.7 ± 38.1

88.6 ± 34

10.3 ± 2.4

10.41 ± 2.9

10.8 ± 2.6

10.8 ± 3.3

10.5 ± 3.2

11.2 ± 4.4

1.1 ± 0.9

1.7 ± 1.2

2.5 ± 2.3

2.6 ± 2.2

2.4 ± 2.6

2.2 ± 2.3