How long does it take to have an abdominal CT scan on an empty stomach during a physical examination

A physical examination for abdominal CT usually requires fasting for 8-12 hours. The main purpose of fasting before abdominal CT examination is to reduce the interference of gastrointestinal contents on the image and ensure the accuracy of the examination results. Insufficient fasting time may lead to food residues or fluids in the stomach affecting the visualization of organs such as the pancreas and gallbladder, while prolonged fasting time may cause discomfort such as hypoglycemia. Fasting 8-12 hours before the examination can completely empty the stomach, but a small amount of drinking water is allowed. If enhanced CT scanning is required, fasting requirements are more stringent, and some institutions may recommend extending it to more than 12 hours. Three days before the examination, high-fat diet should be avoided to reduce intestinal gas accumulation. Patients with diabetes need to communicate with the doctor in advance to adjust the medication plan, so as to prevent hypoglycemia caused by prolonged fasting. On the day of the inspection, you can bring a sugar free beverage as a backup, and replenish energy promptly after completing the inspection. Elderly or physically weak individuals should be accompanied by someone to avoid dizziness and fatigue caused by prolonged fasting. If the examination is scheduled in the afternoon, you can choose easily digestible liquid foods for breakfast and finish eating before 6 o'clock. Drinking plenty of water within 48 hours after examination can help with contrast agent metabolism, but individuals with abnormal kidney function should follow medical advice to control their water intake.