G. Hedenstierna, L. Edmark, G. Perchiazzi

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Postoperative lung complications: have multicentre studies been of any help? G. Hedenstierna, L. Edmark, G. Perchiazzi British Journal of Anaesthesia Volume 114, Issue 4, Pages 541-543 (April 2015) DOI: 10.1093/bja/aeu343 Copyright © 2015 The Author(s) Terms and Conditions

Fig 1 When awake, airways and alveoli are all open (in this example), although their dimensions are smaller in dependent regions. During anaesthesia, lung volume (FRC) is reduced, airways close, and alveoli collapse (atelectasis) in the lowermost regions. Recruitment manoeuvres and PEEP increase lung volume and may reopen airways and collapsed alveoli. However, during emergence from anaesthesia and during the postoperative period, lung volume will again decrease unless protective measures are taken and even a transient decrease may cause atelectasis. This is likely when inspired oxygen concentration is high. British Journal of Anaesthesia 2015 114, 541-543DOI: (10.1093/bja/aeu343) Copyright © 2015 The Author(s) Terms and Conditions