Fig. 3From: Recruitability and effect of PEEP in SARS-Cov-2-associated acute respiratory distress syndromeDistribution of estimated shunt at positive end-expiratory pressure (PEEP) 5 cmH2O and 15 cmH2O in the highly recruitable and poorly recruitable patients groups, within 36 h after intubation. Shunt was calculated with standard formula [13], using central venous blood gases as a surrogate for mixed venous blood gases [14]. *p <0.01. ‡p =0.03Back to article page