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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. 4 — Regional ventilation delay for the healthy lung under volume-controlled ventilation (VCV) (a), flow-controlled expiration (FLEX) ventilation (b) and second VCV period (c). Colder (darker blue) colors represent lung areas that participate early in the ventilation, warmer (lighter blue) colors are areas with a delay in inspiration starting time. A larger fraction of lung area participates earlier in ventilation when using FLEX ventilation. This effect is nearly mitigated after switching off FLEX ventilation