phe·nol·sul·fon·phthal·ein (f  n l-s lfn-th l n, -thl- n, -th ln, -thl-n, -slf n-)n. Abbr. PSP See phenol red. |
phenolsulfonphthalein
[fē′nəlsul′fōnfthal′ē·in]
a bright red water-soluble triphenylmethane dye used as an indicator at pH 7.7. Also called phenol red. See also cystochromoscopy.
phenolsulfonphthalein
an acid-base indicator dye; abbreviated PSP.
phenolsulfonphthalein (PSP) clearance test
after an injection of the dye, urine samples are collected at timed intervals and the amount of excreted dye is determined and plotted against time as an indicator of renal function, particularly renal blood flow, tubular excretion, and to some extent glomerular filtration.
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