Table 1 Lung mechanics, ventilation and hemodynamic parameters during supine and prone position while loading and unloading the chest wall

End-inspiratory airway pressure (cmH₂O)

28

24

25

20

End-inspiratory transpulmonary pressure (cmH₂O)

26

20

23

13

Airway driving pressure (cmH₂O)

16

12

13

8

Respiratory system elastance (cmH₂O/L)

41

45

28

Chest wall elastance (cmH₂O/L)

3

7

3

10

Lung elastance (cmH₂O/L)

52

34

42

18

Venous admixture (%)

37

34

34

29

PaO₂/FiO₂

104

122

115

160

pH

7.29

7.31

7.31

7.34

SvO₂ (%)

79

78

77

76

PvO₂ (mmHg)

47

46

44

44

PaCO₂ (mmHg)

59

56

54

52

EtCO₂ (mmHg)

36

37

38

39

Alveolar dead space (%)

39

34

29

25

VCO₂ Membrane lung (ml/min)

139

133

134

112

VCO₂ Natural lung (ml/min)

97

106

105

130

VO₂ (ml/min)

268

272

277

283

Heart rate (bpm)

83

84

86

87

Arterial blood pressure (mmHg)

118/62

114/64

115/65

118/68

Pulmonary wedge pressure (mmHg)

8

10

10

14

Pulmonary arterial pressure (mmHg)

39/13

37/14

34/15

38/18

Cardiac Index (l/min/m²)

3.5

3.5

3.3

3.2