Gastroscopy is a day procedure involving visual examination of the lining of your oesophagus, stomach and the first part of your intestine.
This is performed by passing a small bore long flexible telescope (gastroscope) through your mouth while you are under sedation.
The doctor will be able to look for any abnormalities which may be present. If necessary, biopsies can be taken during the examination.
The procedure takes about 15 to 30 minutes. You can usually go home after about 2 hours.