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. 2020 Sep 24;3(2):e18367. doi: 10.2196/18367

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©David Dallas-Orr, Yordan Penev, Robert Schultz, Jesse Courtier. Originally published in JMIR Perioperative Medicine (http://periop.jmir.org), 24.09.2020.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Perioperative Medicine, is properly cited. The complete bibliographic information, a link to the original publication on http://periop.jmir.org, as well as this copyright and license information must be included.

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Bland-Altman plots for the circumference tool measurements for a) diameter A, b) diameter B, c) diameter C, d) all diameters combined, and of the angle tool measurements for e) angle A, f) angle B, g) angle C, h) all angles combined.