Mayo Test Catalog, (Sorted By Test Name) - Mayo Medical ...

RCITR
84773
CITR
9329
associated with excessive serum concentration are fatigue, impotence, insomnia, and anticholinergic
effects. The toxic range for R,S-citalopram is >400 ng/mL and S-citalopram is >250 ng/mL.
Reference Values:
R,S-Citalopram: 100-250 ng/mL
S-Citalopram: 50-130 ng/mL
Clinical References: 1. Physicians' Desk Reference (PDR). 59th edition. Montvale, NJ, Medical
Economics Company, 2005 2. Goodman & Gilman's The Pharmacological Basis of Therapeutics. 10th
edition. Edited by JG Hardman, LE Limbird. New York, McGraw-Hill Book Company, 1994, p 1934
Citrate Excretion, Pediatric, Random, Urine
Clinical Information: Urinary citrate is a major inhibitor of kidney stone formation due in part to
binding of calcium in urine. Low urine citrate levels are considered a risk for kidney stone formation.
Several metabolic disorders are associated with low urine citrate. Any condition which lowers renal
tubular pH or intracellular pH may decrease citrate (eg, metabolic acidosis, increased acid ingestion,
hypokalemia, or hypomagnesemia). Low urinary citrate is subject to therapy by correcting acidosis,
hypokalemia, or hypomagnesemia by altering diet or using drugs such as citrate and potassium.
Useful For: Diagnosing risk factors for patients with calcium kidney stones. Monitoring results of
therapy in patients with calcium stones or renal tubular acidosis. A timed 24-hour urine collection is the
preferred specimen for measuring and interpreting this urinary analyte. Random collections normalized
to urinary creatinine may be of some clinical use in patients who cannot collect a 24-hour specimen,
typically small children. Therefore, this random test is offered for children