phenolsulfonphthaleinmedical dictionary


4,4'-(3h-2,1-benzoxathiol-3-ylidene)bisphenol s,s-dioxide. Red dye, pH indicator, and diagnostic aid for determination of renal function. It is used also for studies of the gastrointestinal and other systems.

Pharmacological action: indicators and reagents, phthalein dyes.

Chemical name: Phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis-, S,S-dioxide

Abbreviation: PSP

(12 Dec 1998)

phenolsulfonphthalein testmedical dictionary

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.

Synonyms: Geraghty's test, phthalein test, red test, Rowntree and Geraghty test.

(05 Mar 2000)

phenolphthaleins, phenol red, phenolsulfonphthalein < Prev | Next > phenoluria, phenomenalism, phenomenology

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