Test Details

Mnemonic

HEXOS

Ordering Code

3806000

CPT-4 Code(s)

83080 x 2

Specimen Information

Collect

Serum separator tube (SST)

Specimen Preparation

Centrifuge, separate and send 1.0 mL serum in a screw capped plastic vial. Serum assay results are not valid on pregnant females and will not be run.

Alternate Specimen

Serum: Red top

Minimum Volume

0.5 mL

Transport Temperature

Frozen

Rejection Criteria

Grossly icteric specimens

Stability

Room temperature: Unacceptable
Refrigerated: 7 days
Frozen: 30 days

Methodology

Heat Inactivation, Fluorometric, Automated
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Reference Range

Hexosaminidase total, serum
≤15 yrs: ≥20 nmol/min/mL
≥16 yrs: 10.4-23.8 nmol/min/mL
Hexosaminidase percent A, serum
≤15 yrs: 20-90%
≥16 yrs: 56-80%
Reference values have not been established
for patients <5 years of age.
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Performing Laboratory

MAYO
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New York DOH Approval Status

Yes
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