fluorescein string test
fluor·es·ce·in string test
an infrequently used test in which a patient with gastrointestinal bleeding swallows a string; fluorescein is given intravenously; if the string fluoresces after removal, it has been contaminated by blood that has appeared since injection of the fluorescein; used to determine location of bleeding lesion.
Farlex Partner Medical Dictionary © Farlex 2012
fluorescein string testA crude obsolete test in which the subject swallows a string followed by intravenous injection with fluorescein; if the string fluoresces on removal it is diagnostic of active gastrointestinal bleeding. In the current setting active GI bleeding is evaluated by physical examination, endoscopy, angiography and radiologic contrast (barium) studies.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.