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Lab Dept:
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Urine/Stool
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Test Name:
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CARBOHYDRATE, RANDOM URINE
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General Information
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Lab Order Codes:
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CARBO
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Synonyms:
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Disaccharide Screening; Fructose; Lactose; Maltose; Monosaccharide Screening; Reducing Substances Qualitative Urine; Saccharides Urine; Succinylnucleotidase Screening; Sucrose
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CPT Codes:
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84377 – Sugars, single qualitative, each specimen
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Test Includes:
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Screen for fructose, glucose, galactose, disaccharides, oligosaccharides and succinlypurines in random urine. The saccharide present is named, identification of the probably source, and an interpretive comment is provided.
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Logistics
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Test Indications:
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Screening for disorders with increased excretion of carbohydrates.
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Lab Testing Sections:
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Chemistry - Sendouts
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Referred to:
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Mayo Medical Laboratories (MML Test#: 9255/CHOU)
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Phone Numbers:
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MIN Lab: 612-813-6280
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STP Lab: 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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2 – 4 days, test performed Monday, Wednesday and Friday
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Special Instructions:
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Early morning specimens are preferred.
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Specimen
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Specimen Type:
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Urine, random
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Container:
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Screw-capped urine container
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Draw Volume:
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Entire random urine collection
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Processed Volume:
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5 mL (Minimum: 1 mL) random urine
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Collection:
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Voided or catheterized urine specimen
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Special Processing:
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Lab Staff: Mix specimen well. Aliquot 5 mL of urine into a plastic, 13 mL urine tube. Store and ship at frozen temperatures. Forward promptly.
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Patient Preparation:
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None
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Sample Rejection:
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Specimens other than urine; warm specimens; mislabeled or unlabeled specimens
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Interpretive
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Reference Range:
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Negative
If positive, carbohydrate is identified.
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Critical Values:
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N/A
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Limitations:
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A number of compounds (identifiable by the technique used) interfere with the assay; microbial contamination can lead to uninterpretable patterns of urinary saccharides. Retesting will be recommended in these cases.
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Methodology:
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Thin-Layer Chromatography (TLC), Qualitative
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References:
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Mayo Medical Laboratories January 2013
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