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Table 2 Respiratory parameters during the decremental PEEP steps

From: Bedside measurement of changes in lung impedance to monitor alveolar ventilation in dependent and non-dependent parts by electrical impedance tomography during a positive end-expiratory pressure trial in mechanically ventilated intensive care unit patients

PEEP [cm H2O]

 

15

10

5

0

Significance between groups

EELV (L)

N

2.3 (0.3)

2.2 (0.2)

1.8 (0.2)*

1.5 (0.2)

 
 

D

1.9 (1.0)

1.6 (1.0)*

1.3 (0.8)*

1.2 (0.6)

P = NS

PaO 2 /FiO 2

(kPa)

N

62.3 (1.9)

63.7 (9.4)*

58.3 (13.9)

50.3 (13.8)

 
 

D

37.9 (10.5)

39.0 (8.6)

33.5(15.2)

26.8 (5.1)

P <0.01

Cdyn

(ml/cm H 2 O)

N

38.6 (7.4)

45.0 (4.5)

45.0 (4.6)

41.0 (1.2)

 
 

D

34.1 (11.0)

37.0 (12.6)*

35.0 (13.3)*

29.0 (7.1)

P = NS

  1. Data are presented as median and (where appropriate) interquartile range. N, without lung disorders, D, with lung disorders. PEEP, positive end-expiratory pressure; EELV, end-expiratory lung volume; Cdyn, dynamic compliance. Asterisk represents significance within groups vs. 15 cm H2O.