10 mL (5 mL min.) aliquot of random urine. Ship refrigerated or frozen.
This assay is useful for the assessment and management of patients with kidney stones, particularly uric acid stones. Urinary uric acid excretion is elevated in a significant proportion of patients with uric acid stones, due to uric acid overproduction as in Leukemia and Polycythemia and after intake of food rich in nucleoproteins.