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HelpTest ID I2SW Iduronate-2-Sulfatase, Whole Blood
Useful For
Diagnosis of mucopolysaccharidosis II (MPS II, Hunter syndrome) in whole blood specimens
Special Instructions
Method Name
Fluorometric Enzyme Assay
Reporting Name
Iduronate-2-sulfatase, BSpecimen Type
Whole bloodNecessary Information
Provide a reason for referral with each specimen.
Specimen Required
Collection Container/Tube:
Preferred: Lavender top (EDTA)
Acceptable: Yellow top (ACD)
Specimen Volume: 2 mL
Specimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole blood | Ambient (preferred) | 7 days |
| Refrigerated | 7 days |
Reference Values
≥1.5 nmol/h/mL
Day(s) and Time(s) Performed
Varies
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
82657
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| I2SW | Iduronate-2-sulfatase, B | 79462-8 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 61902 | Iduronate-2-sulfatase, B | 79462-8 |
| 35211 | Reviewed By | 18771-6 |
| 35212 | Interpretation (I2SW) | 59462-2 |
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.Forms
1. New York Clients-Informed consent is required. Document on the request form or electronic order that a copy is on file. The following documents are available in Special Instructions:
-Informed Consent for Genetic Testing (T576)
-Informed Consent for Genetic Testing-Spanish (T826)
2. Biochemical Genetics Patient Information (T602) in Special Instructions.
3. If not ordering electronically, complete, print, and send an Inborn Errors of Metabolism Test Request (T798) with the specimen.