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HelpTest Code LAB1231938 Carbohydrate, Urine
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Reporting Name
Carbohydrate, USpecimen 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.
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Frozen (preferred) | 21 days | |
| Refrigerated | 21 days |
Specimen Minimum Volume
1 mL
Special Instructions
Day(s) Performed
Tuesday
Specimen Retention Time
14 daysReport Available
8 to 15 daysReference Values
Negative
If positive, carbohydrate is identified.
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| GALU | Galactose, QN, U | Yes | No |
Useful 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.
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.
CPT Code Information
84377-Carbohydrate
82760-Galactose (if appropriate)
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| CHOU | Carbohydrate, U | 16550-6 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 9255 | Carbohydrate, U | 16550-6 |
Forms
Biochemical Genetics Patient Information (T602) in Special Instructions.