Fasting is required for appendicitis surgery and for most surgeries, especially those of the gastrointestinal tract. Some procedures also require bowel preparation, which is the emptying of the contents of the intestine. The main reason for requiring fasting is to prevent intraoperative pulling of the intestinal canal, which can lead to vomiting. Patients who vomit during anesthesia are often prone to death by aspiration leading to pneumonia or asphyxia, so it is important to avoid it. For patients with acute appendicitis, the difference between the time from admission to diagnosis and the decision to operate, plus the time when the patient last ate, can be started if the difference is greater than 4-6 hours, because gastric emptying takes 4-6 hours and can be done after adequate gastric emptying without special bowel preparation.