Fig. 2From: 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 studyQualitative evaluation based on the type of gastric contents, reported as empty (A); liquid (B); solid (C); mixed (D). Note the different echogenicity of the gastric lumen. A = gastric antrum; Ao = aorta; LHL = left hepatic lobeBack to article page