upper GI series


n.

A radiologic study in which barium sulfate is swallowed, providing an image of the upper gastrointestinal tract including the esophagus, stomach, and duodenum.barium swallow

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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.