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
Refrigerated: 7 days
Frozen: 30 days
Methodology
Heat Inactivation, Fluorometric, Automated
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.
≤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.
Performing Laboratory
MAYO
New York DOH Approval Status
Yes