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Fig. 3 | BMC Anesthesiology

Fig. 3

From: Prediction of postoperative nausea and vomiting by point-of-care gastric ultrasound: can we improve complications and length of stay in emergency surgery? A cohort study

Fig. 3

Two methods to measure the antral cross-sectional area: A indirectly, through the measurement of two perpendicular diameters (i.e. anteroposterior and cranio-caudal diameters), which are then used to calculate the area of an ellipse with a mathematical formula; B directly, through the US machine tracing system

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BMC Anesthesiology

ISSN: 1471-2253

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