Figure 3From: Lung volume assessments in normal and surfactant depleted lungs: agreement between bedside techniques and CT imaging Lung clearance index (LCI) obtained by helium multiple breath washout technique at different PEEP levels in normal (closed symbols) and surfactant depleted lungs (open symbols). *: p < 0.05 vs. PEEP0, #: p < 0.05 normal vs. surfactant depletion within a PEEP.Back to article page