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Galactitol, Quantitative, Urine
Test Code13524
CPT Codes
82542<br>Restricted Client Code
Preferred Specimen
2 mL random urine collected in a plastic, leakproof (preservative-free) container
Minimum Volume
1 mL
Instructions
1. Collect a random urine specimen.
2. No preservative.
Patient's age and reason for referral are required.
3 mL urine collected in Aliquot Tube, 5 mL (T465), minimum: 1 mL
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: Unacceptable
Refrigerated: 28 days
Frozen: 28 days
Refrigerated: 28 days
Frozen: 28 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability
Methodology
Gas Chromatography Mass Spectrometry
FDA Status
This test was developed, and its performance determined by Mayo Clinic in a manner consistent with CLIA in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.
Setup Schedule
Set up: Tues; Report available: 2-9 days
Reference Range
0-11 months: <109 mmol/mol creatinine
1-3 years: <52 mmol/mol creatinine
4-17 years: <16 mmol/mol creatinine
≥18 years: <13 mmol/mol creatinine
1-3 years: <52 mmol/mol creatinine
4-17 years: <16 mmol/mol creatinine
≥18 years: <13 mmol/mol creatinine
Clinical Significance
Diagnosing Pompe disease, when used in conjunction with acid alpha-glucosidase enzyme activity assays and molecular genetic analysis of the GAA gene. Monitoring Pompe patients on enzyme replacement therapy may support the diagnosis and monitoring of other glycogen storage disorders; however, glucotetrasaccharide (Glc4) excretion appears to be less consistently elevated in glycogen storage disorders other than Pompe disease.
This test is not useful for carrier screening.
This test is not useful for carrier screening.