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. 2021 Jul 28;22(1 Suppl):18–31. doi: 10.1177/11297298211018060

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© The Author(s) 2021

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 11. — Brachial flow rate calculation in AVF. (a) High-flow rate in brachial-cephalic fistula. Q_b = 1770 ml/min; brachial artery diameter 6.2 mm; TAV_m 96.6 cm/s; RI 0.29; S/D ratio is 1.4. (b) High-flow rate in proximal brachial-cephalic fistula. Q_b = 2224 ml/min; brachial artery diameter 6.3 mm; TAV_m 118 cm/s; S/D ratio 2.1. (c) Normal flow-rate in distal brachial-cephalic fistula with multiple no significant draining vein stenoses. Q_b = 511 ml/min; brachial artery diameter 5.0 mm; TAV_m 43,1 cm/s; TAMV 68,9 cm/s; RI 0.59; S/D ratio is 2.4. (d) Low flow rate indistalbrachial-cephalic fistula with stenosis of outflow. Q_b = 259 ml/min; brachial artery diameter 4.5 mm; TAV_m 24.9 cm/s; RI 0.72; S/D ratio is 3.5.