Skip to main content

Table 2 Arterial oxygenation, compliance and ventilator settings during decremental PEEP stepsa

From: Electrical impedance tomography measured at two thoracic levels can visualize the ventilation distribution changes at the bedside during a decremental positive end-expiratory lung pressure trial

 

PEEP (cm H2O)

Measurement

Baseline 5

15

10

5

0

Compliance (mL/cm H2O)

52.9 ± 9.6

60.2 ± 9.2

63.0 ± 8.6

57.9 ± 7.8

41.2 ± 7.4b

PaO2/FiO2 ratio (kPa)

39.9 ± 15.7b

64.5 ± 13.7

61.9 ± 14.8

47.5 ± 14.4c

28.8 ± 11.2d

Ventilatory mode

PCV

PCV

PCV

PCV

PCV

Inspiratory-to-expiratory ratio

1:1

1:1

1:1

1:1

1:1

Driving pressure (cm H2O)

10 ± 2

10 ± 2

10 ± 2

10 ± 2

10 ± 2

Respiratory rate (breaths/minute)

15 ± 1

15 ± 1

15 ± 1

15 ± 1

15 ± 1

Tidal volume (mL)

491 ± 54

591 ± 120

615 ± 103

565 ± 91

403 ± 88

  1. aPaO2/FiO2 ratio: ratio of partial pressure of oxygen to fraction of inspired oxygen; PCV: pressure-controlled ventilation; PEEP, positive end-expiratory pressure. BL: Baseline. Data are means ± standard deviations unless otherwise indicated. Significance compared to 15 cm H2O: b < 0.01, c < 0.05, d < 0.001.
Back to article page

Critical Care

ISSN: 1364-8535