upper gastrointestinal (UGI) series
up·per gas·tro·in·tes·tin·al (UGI) ser·ies
(ŭp'ĕr gas'trō-in-tes'ti-năl sēr'ēz)A fluoroscopic-radiographic examination of the esophagus, stomach, and duodenum; a contrast medium, usually barium sulfate, is introduced in preparation.
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