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. 2019 Jul 25;7(Suppl 1):38. doi: 10.1186/s40635-019-0243-4

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© The Author(s). 2019

Open Access This 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.

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Fig. 1 — Experimental quasi-static PV curve from 3 to 30 cmH₂O performed with a flexiVent® mechanical ventilator (SCIREQ, Montreal, QC, Canada). The total area, obtained by multiplying the volume difference (ΔV) by the pressure difference (ΔP_RS) during the maneuver, was determined (270 mL cmH₂O). Then, the area under the PV curve was calculated (174 mL cmH₂O) and subtracted from the total area, yielding the white area (96 mL cmH₂O)