Endoscopy involves a small thin tube with a camera on the end.
This is guided down the throat to investigate problems in your oesophagus and digestive system.
Small surgical instruments can be guided down in the same way, meaning it can be used for diagnosis and treatment.
Run by consultants specialising in bowel-related medicine, this department investigates and treats upper and lower gastrointestinal disease, as well as diseases of the pancreas and bile duct system.
This includes endoscopy and nutritional services.
Sub-specialities include colerectal surgery, inflammatory bowel disease and swallowing problems.
There are often endoscopy nurse specialists linked to a gastroenterology unit who are able to perform a wide range of bowel investigations.