R Kruisselbrink, C Arzola, T Jackson, A Okrainec, V Chan, A Perlas 

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Ultrasound assessment of gastric volume in severely obese individuals: a validation study  R Kruisselbrink, C Arzola, T Jackson, A Okrainec, V Chan, A Perlas  British Journal of Anaesthesia  Volume 118, Issue 1, Pages 77-82 (January 2017) DOI: 10.1093/bja/aew400 Copyright © 2017 The Author(s) Terms and Conditions

Fig 1 Concordance between the calculated volume and suctioned volume. The continuous green line represents perfect concordance. The dotted orange line represents the ‘best fit’ of the study data. British Journal of Anaesthesia 2017 118, 77-82DOI: (10.1093/bja/aew400) Copyright © 2017 The Author(s) Terms and Conditions

Fig 2 Bland–Altman analysis demonstrating the agreement between the calculated volume (CV) and the suctioned volume (SV). The y-axis represents the difference between the two values (CV−SV) and the x-axis the mean between the two values (CV+SV/2). The continuous green line represents perfect agreement. The continuous pink line is the mean difference of the model. The outer dotted lines represent the upper and lower limits of 95% agreement. British Journal of Anaesthesia 2017 118, 77-82DOI: (10.1093/bja/aew400) Copyright © 2017 The Author(s) Terms and Conditions