hospital for the procedure. There have also been case reports of acute pancreatitis (at a rate of 0.3%-0.4%, when the oral route is used) and intestinal necrosis associated with the technique. A 2015 study in the World Journal of Gastrointestinal Endoscopy reported that: "Due to prolonged procedure and air insufflation, abdominal pain can be observed in up to 20% patients." Depending on whether the oral or rectal approach was used, a patient may experience a sore throat (following use of the oral route), upset stomach, vomiting, and painful bloating, cramping, or abdominal discomfort in reaction to the gas in the intestines. References Gastroenterology Endoscopy