Point of care ultrasound to estimate of gastric residual volume before general anaesthesia after prolonged fasting and 4hr and 2 hours fasting for clear liquids - an observational cross sectional study

The presence of gastric contents increases the risk of aspiration. As a result, practiceguidelines for preoperative fasting were developed to provide adequate time for gastric emptying in patients undergoing surgery. Point-of-care gastric ultrasound preoperative gastric ultrasound represents a feasible option that can be incorporated into standard anesthesia practice to assess the gastric antrum and, thereby, gastric volume owing to its cost-effectiveness and ease of performing at the bedside.