This is an examination of your oesophagus, stomach and the first part of your small bowel called the duodenum. It is carried out by (or under direct supervision of) a trained doctor or nurse called an endoscopist. A gastroscopy is a very accurate way of looking at the lining of your upper digestive tract to establish whether there is any disease or abnormality present.
The instrument used is called a gastroscope (scope) and is a thin flexible tube. The scope has a light which is shone onto the lining of the digestive tract. It also has a very small camera which sends live images to a screen where it is viewed by the endoscopist as the scope is passed around your digestive tract.
During the procedure, the endoscopist may need to take some small tissue samples called biopsies for analysis; this is painless. They may also take some photographs to retain in your medical records.