Fig. 1From: The safety of preoperative carbohydrate drinks in extremely elderly patients assessed by gastric ultrasonography: a randomized controlled trialRepresentative figure of gastric CSA measurement, showing CSA measurements in the 2 perpendicular diameters. (Line1: LD; Line2: SD). Abbreviations: CSA, cross-sectional area; LD, longest diameter, SD, shortest diameterBack to article page