Fig. 2

Dynamic changes of complete lung atelectasis/consolidation in right lower lobe during recruitment due to PEEP, monitored by ultrasound. a Complete lung atelectasis/consolidation in right lower lobe, tissue-like pattern located in the lung, obtained at the end of expiration, PEEP = 0 cmH2O. b The image obtained at the end of inspiration, zero PEEP. c–f Images obtained at the end of expiration 10 s after PEEP at a level of 5, 10, 15 and 20 cmH2O, lung atelectasis/consolidation was partly recruited