upper GI series
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upper GI series(jē′ī′)
A radiological study in which a solution containing barium sulfate is swallowed, allowing visualization of the upper gastrointestinal tract including the esophagus, stomach, and duodenum. Also called barium swallow.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.