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. 2021 Jun 1;11:11505. doi: 10.1038/s41598-021-90820-4

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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The flowrate–pincher position relationship. For all tested conduits, the maximal flow rates were observed when the pincher was at the very edge (i.e., the position closest to the junction between the compliant tube and the connector). No net flow was observed when pincher was located in the middle of the tube. The values shown in this graph were acquired using a 27-mm-long, 5-mm-wide compliant segment with a wall thickness of 0.4 mm with the loop filled with aqueous solution. The data shown are for the two pincher positions—2 mm and 7 mm from the junction between the stiff and compliant segments.