Table 3 Lung volumes and respiratory mechanics

Tidal volume (V_T)

ml

565.3 ± 160.5

577.6 ± 185.3

593.4 ± 200.7

Tidal volume per kg IBW (V_T/kg_IBW)

ml/kg

7.2 ± 1.4

7.4 ± 1.6

7.6 ± 1.8

EELV

l

1.12 ± 0.49

1.00 ± 0.26

1.07 ± 0.31

Mean airway pressure

cmH₂O

15.1 ± 2.1

15.6 ± 2.3

15.7 ± 2.1^a

Plateau pressure (P_plat)

cmH₂O

22.4 ± 4.3

22.1 ± 3.8

23.6 ± 4.5^a,b

Respiratory system compliance

ml/cmH₂O

52.1 ± 17.6

52.9 ± 18.8

49.3 ± 18.1^b

Lung compliance

ml/cmH₂O

71.5 ± 23.8

93.5 ± 47.3^a

102.0 ± 47.0^a

Chest wall compliance

ml/cmH₂O

235.2 ± 152.5

158.1 ± 77.8

102.5 ± 38.0^a,b

Transpulmonary pressure change^c

cmH₂O

8.4 ± 2.2

7.1 ± 2.2^a

6.6 ± 2.3^a

Pleural pressure change^c

cmH₂O

3.2 ± 1.9

4.3 ± 1.9

6.1 ± 1.8^a,b

Gastric pressure

cmH₂O

13.4 ± 4.0

14.3 ± 3.5

13.2 ± 4.3

Gastric pressure change^c

cmH₂O

2.6 ± 0.8

3.4 ± 1.1^a

4.5 ± 1.9^a,b

Transdiaphragmatic pressure

cmH₂O

0.6 ± 2.0

0.9 ± 1.6

1.6 ± 1.7

Bladder pressure

cmH₂O

12.0 ± 2.8

14.5 ± 3.4^a

14.5 ± 3.7^a