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. 2020 Aug 24;7(8):200585. doi: 10.1098/rsos.200585

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© 2020 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 2. — Circuit diagram for the modified splitter. Compared to figure 1, variable resistors R_V1 and R_V2 have been added to control the pressure/flow/volume to each patient, and diodes have been added to stop the expiration arms acting as a short circuit between inspiration arms during inspiration. Changes with respect to the standard circuit are highlighted in red.