fluorescein string test
Definition: 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.
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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.