How long should I fast in advance for gastroscopy during physical examination

Physical examination and gastroscopy require fasting for 6-8 hours in advance. The main purpose of fasting before gastroscopy is to ensure that there is no food residue in the stomach and to avoid vomiting or aspiration during the examination process. The gastric emptying time is usually 4-6 hours, but considering individual differences and food types, extending it to 6-8 hours can more thoroughly empty the stomach contents. It is recommended to choose digestible semi liquid food, such as Congee and noodles, for dinner one day before the examination, to avoid high fat, high protein and coarse fiber food. On the morning of the day of inspection, it is necessary to completely abstain from food and water, including chewing gum, candies, and other items that may stimulate stomach acid secretion. If it is an afternoon examination, you can follow the doctor's advice to drink a small amount of water 6 hours before the examination, but water should be strictly prohibited 2 hours before the examination. Patients with diabetes need to communicate with the doctor in advance to adjust the medication and diet plan to avoid the risk of hypoglycemia. Within 2 hours after the SEP examination, fasting should continue. After the anesthesia in the throat disappears, a small amount of water can be consumed first. If there is no coughing, gradually return to a liquid diet. Avoid spicy and stimulating foods, overheated foods, and alcohol intake within 24 hours. If biopsy or treatment is performed during the examination process, it is necessary to strictly follow the doctor's advice to extend the fasting time and cooperate with medication treatment. Long term use of anticoagulant drugs before gastroscopy should inform the doctor in advance and adjust the medication plan based on the evaluation results.