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Test Code I2SW Iduronate-2-Sulfatase, Whole Blood

Reporting Name

Iduronate-2-sulfatase, B

Useful For

Diagnosis of mucopolysaccharidosis II (MPS II, Hunter syndrome) in whole blood specimens

 

This test is not useful for determining carrier status for MPS II.

Testing Algorithm

The following algorithms are available in Special Instructions:

-Lysosomal Storage Disorders Diagnostic Algorithm, Part 1

-Lysosomal Storage Disorders Diagnostic Algorithm, Part 2

Method Name

Fluorometric Enzyme Assay

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Whole blood


Necessary 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 Special Container
Whole blood Ambient (preferred) 7 days
  Refrigerated  7 days

Reject Due To

All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Reference Values

≥1.5 nmol/hour/mL

Day(s) and Time(s) Performed

Varies

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.

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

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.