Bisinotto FMB, et al. – This research focused on exploring the gastric volume of volunteers, after an overnight fast. It also compared the findings with the gastric volume 2 h after ingestion of 200 and 500 mL of isotonic solution, via ultrasound assessment. It was deduced that the ultrasound assessment of gastric volume did not exhibit any marked variation, both qualitative and quantitative, 2 h after ingestion of 200 mL or 500 mL of isotonic solution compared to fasting. However, the gastric fluid content was detected in more volunteers, particularly after ingestion of 500 mL isotonic solution.