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. 2019 Mar 20;19:40. doi: 10.1186/s12871-019-0709-7

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© The Author(s). 2019

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. 1 — Components and assembly of the WEI Nasal Jet Tube (WNJ) and automatical jet ventilator: P_etCO₂ = end tidal CO₂ pressure (Compliance with ethical standards: The automatical jet ventilator-TKR-400 and WNJT upon examination and approval by the company, pictures can be used)