Fig. 4From: Can apneic oxygen insufflation become a novel lung protective ventilation strategy? A randomized, controlled, blinded, single center clinical trialComparison of alveolar surfactant protein A ,B, C of BALF. (n = 24, \( \overline{x}\pm s \)) Concentration of alveolar surfactant protein A, B, C of BALF. Compared with those of group C, +P < 0.05. (Mann Whitney test,one-tailed P values)Back to article page