Gastroscopy is based on the examination time to choose the eating time and food. If gastroscopy is done in the morning, you can eat less residue and easy to digest food such as rice soup for dinner the day before the examination, and no more food and water after 8:00 p.m. If gastroscopy is done in the afternoon, you can drink some sweetened water before 8:00 p.m. on the same day, and no more food and water after 8:00 p.m.
At least 6 hours of fasting before gastroscopy is required to ensure that the examination is performed on an empty stomach, otherwise food in the stomach memory will affect observation and increase the risk of vomiting and aspiration. If the patient has delayed gastric emptying or pyloric obstruction, the fasting time should be extended.
If the examination is conducted in the morning of the same day, the day before the examination should be fasted after dinner, and breakfast should be exempted on the same day; if the examination is conducted in the afternoon of the same day, light and semi-liquid food can be eaten for breakfast (e.g. millet porridge, rice porridge, noodle soup, etc.), and fasting is prohibited in the middle of the day. Severe and weak body fasting after the body starting force is difficult to supporters, before the examination should be appropriate infusion of glucose solution.