Ultrasound Measure of Gastric Volume in Diabetic and Non Diabetic Patients Before General Anesthesia

"Antral area is measured by ultrasound using a curvilinear abdominal probe of 2-5 MHz and a Logiq E (General Electrics) type echograph or equivalent.~Ultrasound is done before the induction of general anesthesia. Three consecutive measurements of the anteroposterior (AP) and cranio-caudal (CC) diameters are performed.~Antral area (CSA expressed in mm²) is show by the following formula: CSA = AP × CC × π / 4.~Antral area will correspond to the average of the three measures."