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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