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HelpTest Code LAB5288 Carbohydrate, Urine
Additional Codes
CHOU
Reporting Name
Carbohydrate, UUseful For
Screening for conditions associated with increased excretion of fructose, galactose, and xylose
This test is not recommended as a follow up test for abnormal newborn screening for galactosemia.
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| GALU | Galactose, QN, U | Yes | No |
Testing Algorithm
Testing begins with carbohydrate analysis. If qualitative results are normal or abnormal but not indicative of galactose, testing is complete.
If qualitative results indicate the presence of galactose, then quantitative testing for galactose will be performed at an additional charge.
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
UrineOrdering Guidance
This test is not appropriate for evaluation of an abnormal newborn screen for galactosemia. For those cases, order GCT / Galactosemia Reflex, Blood and consider GAL1P / Galactose-1-Phosphate, Erythrocytes and GATOL / Galactitol, Quantitative, Urine.
Specimen Required
Supplies: Urine Tubes, 10 mL (T068)
Container/Tube: Plastic, 10-mL urine tube
Specimen Volume: 5 mL
Collection Instructions: Collect an early-morning (preferred) random urine specimen.
Specimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Frozen (preferred) | 21 days | |
| Refrigerated | 21 days |
Reference Values
Negative
If positive, carbohydrate is identified.
Day(s) Performed
Tuesday
CPT Code Information
84377-Carbohydrate
82760-Galactose (if appropriate)
Report Available
8 to 15 daysReject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Method Name
Thin-Layer Chromatography (TLC), Qualitative
Forms
Biochemical Genetics Patient Information (T602) in Special Instructions.