What should be noted during an upper gastrointestinal imaging examination?

When undergoing an upper gastrointestinal (GI) series examination, the following points should be observed: 1. Dietary control: You must fast for 12 hours before the examination to ensure the stomach is empty, which facilitates clear visualization. Additionally, do not eat anything after midnight the night before the exam, and avoid high-sugar foods as well as spicy or irritating foods. 2. Lifestyle habits: Do not chew gum or smoke prior to the examination, as these activities may affect the results. After the examination, rest in bed as much as possible and avoid strenuous physical activity. 3. Special conditions: Individuals with severe indigestion or those showing occult blood in stool should not undergo this examination. Also, follow the doctor's instructions carefully, including necessary body movements and positional adjustments on the examination table.