URINARY EXCRETION OF OROTIC ACID IS INCREASED IN MANY UREA CYCLE DISORDERS AND DEFECTS INVOLVING METABOLISM OF ARGININE. THIS ASSAY IS USEFUL IN THE DIFFERENTIAL DIAGNOSIS OF HYPERAMMONEMIA AND HEREDITARY OROTIC ACIDURIA.
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15 ML (10 ML MIN.) ALIQUOT OF RANDOM URINE IN A STERILE SCREW CAPPED CONTAINER. SHIP REFRIGERATED OR FROZEN. COLLECT SPECIMEN FASTING OR 2-3 HOURS POST-FEED. GIVE BRIEF CLINICAL HISTORY.
GC-MS
REPORT ON 4TH DAY EVENING 7PM
COLLECT SPECIMEN FASTING OR 2-3 HOURS POST FEED. GIVE BRIEF CLINICAL HISTORY.