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Watson-Schwartz test

Type: Term

Pronunciation: wot′sŏn schwōrts

Definitions:
1. A qualitative screening test for diagnosis of acute intermittent porphyria, in which Ehrlich diazo agent and saturated sodium acetate are added to the urine. A pink or red color indicates the presence of porphobilinogen or urobilinogen. Because the former indicates porphyria and the latter does not, positive results require further differential extraction with butanol and chloroform to eliminate false-positive results.

Medical Dictionary Copyright © 2006 Lippincott Williams & Wilkins. All rights reserved.







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