Barium swallow, barium meal and follow through examination: a series of X-rays to show your child’s upper digestive tract (oesophagus, stomach and the small intestine) by swallowing a white liquid called barium.
Gastroscopy is an examination of the upper digestive tract (the stomach and duodenum) using an endoscope—a long, thin, flexible tube containing a camera and a light to view the lining of these organs.