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Clinical chemistry reagents used to perform tests in a sample of urine in a short period of time, typically several minutes (i.e., rapid tests), to determine specific chemical constituents in the urine sediment. Urinary sediment rapid-test reagents are usually available in kits and are mostly used for determination of cells (e.g., erythrocytes, leukocytes, cells of the genitourinary tract), aggregates of material deposited in renal tubules (i.e., casts), and crystals (e.g., oxalate, urate, cystine).
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