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Lab Dept:
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Urine/Stool
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Test Name:
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CYSTURIA PROFILE, QUANTITATIVE URINE
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General Information
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Lab Order Codes:
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UCYQ
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Synonyms:
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Cystine, Quantitative urine
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CPT Codes:
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82136 – Amino acids, 2 to 5 amino acids, quantitative, each
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Test Includes:
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Cystine, Lysine, Ornithine, Arginine reported in mcmol/24 h.
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Logistics
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Test Indications:
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Biochemical diagnosis and monitoring of cystinuria. Cystinuria is a disorder of the transport (intestine, kidney tubules) of four amino acids: cystine, lysine, arginine, and ornithine.
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Lab Testing Sections:
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Urine/Stool – Sendouts
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Referred to:
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Mayo Medical Laboratories (Test# 8376)
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Phone Numbers:
Minneapolis:
Saint Paul:
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612-813-6580
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651-220-6550
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Test Availability:
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Daily, 24 hours
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Turnaround Time:
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3 - 5 days, test set up Monday - Friday
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Special Instructions:
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Refrigerate or keep specimen on ice during the entire collection.
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Specimen
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Specimen Type:
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Urine, 24 hour
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Container:
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Plastic leakproof container, 24 hour
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Draw Volume:
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5 mL (Minimum: 1 mL) urine
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Processed Volume:
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Same as Draw Volume
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Collection:
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24 hour collection. Refrigerate or keep specimen on ice during the entire collection.
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Special Processing:
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Lab Staff: Mix 24 hour collection well. Measure 24 hour volume and note volume on specimen label. Remove a 5mL aliquot place into a 13 mL urine tube. Send specimen frozen. Forward promptly.
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Patient Preparation:
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None
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Sample Rejection:
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Mislabeled or unlabeled specimens
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Interpretive
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Reference Range:
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Cystine (mcmol/24 hours)
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3 – 15 years:
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11 – 53
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> or = 16 years:
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28 – 115
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Lysine (mcmol/24 hours)
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3 – 15 years:
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19 – 140
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> or = 16 years:
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32 – 290
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Ornithine (mcmol/24 hours)
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3 – 15 years:
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3 – 16
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> or = 16 years:
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5 – 70
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Arginine (mcmol/24 hours)
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3 – 15 years:
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10 – 25
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> or = 16 years:
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13 – 66
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Conversion formulas
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mcmol/24 hours x 0.24 = result in mg/24 hours
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mg/24 hours x4.17 = result in mcmol/24 hours
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Critical Values:
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N/A
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Limitations:
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N/A
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Methodology:
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Liquid Chromatography – Tandem Mass Spectrometry (LC-MS/MS)
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References:
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Mayo Medical Laboratories Web Page April 2011
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