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Table 2 Effects of higher vs. lower pressure support and PEEP on regional airflows and GI index measured by electrical impedance tomography (EIT)

From: Noninvasive assessment of airflows by electrical impedance tomography in intubated hypoxemic patients: an exploratory study

 

PSVlow

PSVhigh

p value

PSV-PEEPlow

PSV-PEEPhigh

p value

VCV-PEEPlow

VCV-PEEPhigh

p value

MIFnon-dep, L/min

19.5 ± 5.9

26.8 ± 9.7

0.011

26.7 ± 9.4

26.7 ± 10.9

0.969

26.2 ± 6.5

23.8 ± 5.6

< 0.001

MIFdep, L/min

15.3 ± 4.7

13.6 ± 5.5

0.286

15.9 ± 7.0

18.1 ± 8.6

0.339

11.4 ± 4.1

12.9 ± 3.9

< 0.001

MEFnon-dep, L/min

15.5 ± 5.2

23.0 ± 10.1

0.015

22.7 ± 9.0

20.4 ± 9.6

0.007

21.6 ± 4.9

20.1 ± 4.6

< 0.001

MEFdep, L/min

14.1 ± 5.3

12.6 ± 3.6

0.422

15.4 ± 7.1

15.0 ± 6.2

0.819

10.0 ± 3.8

11.1 ± 3.6

0.002

GI index, %

57 ± 14

56 ± 9

0.798

58 ± 12

54 ± 10

0.005

52 ± 8

48 ± 8

< 0.001

  1. PSV, pressure support ventilation; VCV, volume-controlled ventilation; MIF, maximal inspiratory flow; MEF, maximal expiratory flow; dep, dependent; non-dep, non-dependent; GI, global inhomogeneity