Endoscopic Ultrasonography [EUS] is an imaging technique that combines endoscopy with ultrasonography. EUS is performed using an endoscope with a small ultrasound mechine attached to the tip of the endoscope. The endoultrasound probe is passed through the mouth or anus to the area to be examined under endoscopic view. The ultrasound component is then utilized to examine the walls and the surrounding structures of the upper and lower gastrointestinal tract. The esophagus, stomach, duodenum and the rectum are the organs which are studied by this equipment. EUS is also used to study internal organs that lie next to the gastrointestinal tract, such as the mediastinum, gallbladder, biliary tract and the pancreas.
Applications of EUS
- EUS provides detailed images of the anatomy of the digestive tract.
- EUS can be performed to further evaluate the pancreas when abnormalities are noted on CT or conventional abdominal ultrasonography.
- EUS can also be performed to evaluate abnormal areas in the esophagus, stomach and duodenum noted on either endoscopy or an X-ray examination.
- EUS is the only investigation which shows the gastrointestinal wall as a layered structure as seen in microscopic examination of tissues. This feature is helpful understand the exact nature of the pathology.
How is oesophageal manometry done?
During oesophageal manometry, a thin, pressure-sensitive tube is passed through your mouth or nose and into your stomach. Once in place, the tube is pulled slowly back into your oesophagus. When the tube is in your oesophagus, you will be asked to swallow. The pressure of the muscle contractions will be measured along several sections of the tube.
