Medical Definition of Upper gi series
1.
A series of X-rays of the oesophagus, stomach, and small intestine (upper gastrointestinal, or GI, tract) that are taken after the patient drinks a barium solution. (barium is a white, chalky substance that outlines the organs on the X-ray.)
(12 Dec 1998)
Lexicographical Neighbors of Upper GI Series
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