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. 2023 Jul 11;10:1138051. doi: 10.3389/fmed.2023.1138051

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Copyright © 2023 Litvinova, Bilir, Parvanov, Niebauer, Kletecka-Pulker, Kimberger, Atanasov and Willschke.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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A schematic view of a Finapres device for controlling the pressure in the finger cuff (1 – finger cuff; 2 – outer sleeve; 3 – the inflatable bladder; 4 – an infrared LED; 5 – an infra-red sensor; 6 – a line; 7 – a device for controlling the pressure in the bladder; 8 – a pressure sensor; 9 – the housing; 10, 11 – chambers; 12 – the membrane; 13 – a rod; 14 – a coil; 15 – an air pump; 16 – a valve; 17 – a line; 18 – an exhaust valve; 19 – a pressure sensor; 20 – a bypass channel). Diagram modified from reference (43).