Gastroenterology Services

Endoscopic Ultrasound (EUS)


An endoscopic ultrasound (EUS) is a procedure that allows your doctor to see the organs surrounding your upper and lower gastrointestinal tract, including your lungs, liver, gallbladder and pancreas. An EUS is typically performed if you have experienced weight loss, abdominal pain, an abnormal CT scan or x-ray results, or tumors on the intestinal tract or adjacent organs. Pancreatic biopsies can also be performed during the test if tumors or masses are found on the pancreas.

Preparing for the procedure

You should have nothing to eat or drink at least six hours prior to the examination. Your doctor will let you know when to begin fasting before the procedure. Your doctor may also have you refrain from taking blood thinner medications prior to the test.

During the procedure

Sedative medication is administered intravenously to help you relax during the procedure. A thin, flexible tube (endoscope) is inserted into the mouth or rectum and passed to the stomach and duodenum (top part of the small intestine). The end of the endoscope has an ultrasound probe that emits sound waves to create a visual image of your digestive tract and surrounding organs. This allows your doctor to view the inside of your intestinal tract on a TV monitor and the ultrasound images on another monitor simultaneously.

The procedure typically takes between 30 and 90 minutes. You will be able to go home afterwards. You should arrange to have someone drive you after the test since you will experience drowsiness from the sedative.