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Table 2 EELV and inhomogeneity index parameters during different levels of PEEP before and after ALI

From: Assessment of ventilation inhomogeneity during mechanical ventilation using a rapid-response oxygen sensor-based oxygen washout method

  PEEP (cm H2O)
  Before acute lung injury After acute lung injury
  15 10 5 0 15 10 5 0α
EELV (mL) 1,458 1,064* 720* 400* 848* 446* 238* 182*
Lung clearance index 6.1 6.3 6.4* 7.3* 7.2 9.8* 12.9* 19.7
Mixing ratio 1.2 1.2 1.2 1.1 1.2 1.3 1.5* 1.4
Becklake index 4.2 4.2 4.5 5.6* 4.9 6.7* 11.7* 19.3
MBAMI (%) 13.6 12.9 14.8 20.6 15.6 25.8* 45.2* 39.5
Moment ratio 1.6 1.7 1.7* 2.0* 2.0 2.4* 2.9* 3.9
Pulmonary clearance delay (%) 14.7 13.0 10.6 10.0* 15.9 17.4 20.2 10.3
  1. Values are expressed as means. *p < 0.05, significance compared to PEEP 15 (Wilcoxon matched-pairs test), α; n = 6 (unable to perform measurements in two piglets).