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Hexosaminidase A & Total, Serum

Centralized Core Laboratory : Chemistry

Test ID/Workstation :
HEXAS MAYO
Specimen Type:
Blood
Tube Type:
Red top (no anticoagulant) tube
Collection Volume:
2.5 mL (minimum 1.5 mL)
Cause for Rejection:
Specimen rejected: Grossly icteric.
Storage:
Frozen
Availability:
Sent to reference lab
Methodology:
Heat Activation, Fluorometric, Automated
Special Instructions:
Serum assay results are not valid on pregnant females and will not be run. If carrier screening for Tay-Sachs or Sandhoff disease is desired in a pregnant female and testing was not performed prior to pregnancy, referto NAGR / Hexosaminidase A and Total, Leukocytes/Molecular Reflex or NAGW/ Hexosaminidase A and Total Hexosaminidase, Leukocytes for testing on the patient or partner. The recommended test for Tay-Sachs carrier screening (regardless of gender or pregnancy status) is NAGR / Hexosaminidase A and Total, Leukocytes/Molecular Reflex. Please have patient fill out the Mayo Medical Laboratories' Tay-Sachs Disease Prevention Program Questionnaire. Pregnant females can't be tested. It is suggested that the baby's father be tested for carrier status. If father is a positive carrier, the pregnant female should have Hexosaminidase A & Total Leukocytes. For Outpatients, test should only be drawn in outpatient locations within a Hospital (Akron or Beeghly).
Lab/Phone:
330-543-8418
TAT:
8-15 days
Additional Info:
Reference range is available on patient report
CPT Code:
83080x2