Fig. 5From: Pleth variability index and respiratory system compliance to direct PEEP settings in mechanically ventilated patients, an exploratory studyChanges of RSC induced by different levels of PEEP (0, 5, 10 cmH2O). *Significant difference compared with group of PEEP at 0 cmH2O, P < 0.05 (P = 0.0328; n = 18)Back to article page