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Phenolsulfonphthalein test

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phenolsulfonphthalein test

An obsolete test for renal function; after the patient has drunk a glass or two of water, 1 ml of a 0.6% solution of dye is injected hypodermically; the time between this injection and the appearance of a pink tinge in the urine as it falls into an alkaline solution is noted; the amount excreted in each of the next 2 hours is then estimated colourimetrically.

Synonym: geraghty's test, phthalein test, red test, rowntree and Geraghty test.