What is a Endoscopic ultrasonography or EUS?
Endoscopic ultrasonography, or EUS, is used to examine the upper or lower part of the gastrointestinal tract. The upper GI tract includes the esophagus, stomach, and first part of the small intestine, called the duodenum; the lower GI tract includes the colon, anus, and rectum. EUS can also be used to examine other internal organs, such as the pancreas and gallbladder.
EUS involves the use of an endoscope or colonoscope (a long, thin, flexible tube with a light and camera at the end) to help guide the scope throughout the duration of the procedure. However, these scopes are different than those used in colonoscopy and ERCP: they emit sound waves that create visual images of the digestive tract that a normal endoscope cannot detect.
