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. 2018 Sep 29;22:245. doi: 10.1186/s13054-018-2168-9

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© The Author(s). 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — Fractional tidal impedance variation for the healthy (a) and (b) and the injured lung (c) and (d). In general, the main part of the ventilation is located in the ventral area (66.7 ± 4.9%). However, during usage of FLEX a significant redistribution of ventilation from ventral to dorsal areas can be seen in the healthy (p = 0.002) as well as the injured lung (p < 0.001)