% Hex A

Primary unit: %
LOINC codes: 12914-8
Tests that measure % Hex A: Labcorp 1, Quest Diagnostics 1

Ranges

Each lab publishes a reference range for the population groups it tests, usually the middle 95% of results. These intervals describe that population, not an optimal or healthy target. How ranges differ

Quest Diagnostics, Hexosaminidase A and Total Hexosaminidase, Serum 34841

Population	Interval
Hexosaminidase Total	Not stated
≤15 years	≥20 nmol/min/mL
≥16 years	10.4-23.8 nmol/min/mL
Hexosaminidase Percent A	Not stated
≤15 years	20-90%
≥16 years	56-80%

Quest Diagnostics test catalog, 34841

Tests

Check the catalog code, specimen, method and preparation for every test that measures % Hex A. Select up to five tests to compare them side by side.

Labcorp 1 test

Panels that include this biomarker

Tay-Sachs Disease, Biochemical 510412
2 analytes · Serum · Fasting not stated · Turnaround 4 - 14 days
Method and collection
Method
Determination of enzymatic activity using heat inactivation
Collection
Separate serum from cells within 30 minutes of collection. Transfer specimen to a plastic transport tube before freezing. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested .
Labcorp catalog page

Quest Diagnostics 1 test

Panels that include this biomarker

Hexosaminidase A and Total Hexosaminidase, Serum 34841
2 analytes · Serum · Fasting not stated · Turnaround Set up: Tues; Report available: 15 days
Method and collection
Method
Heat Inactivation • Fluorometric • Automated
Collection
If females wish screening for carrier status of Hexosaminidase A Deficiency, they must be tested prior to pregnancy. If the female is pregnant, we strongly suggest that her mate be tested for carrier status. Positive (or ambiguous) findings in the mate indicate a second order test on the female with leukocyte preparations. Refer to 16330 (Mayo code NAGR) Hexosaminidase A and Total, Leukocytes/Molecular Reflex or 34842 (Mayo code NAGW) Hexosaminidase A and Total Hexosaminidase, Leukocytes for carrier detection and diagnosis of Tay-Sachs disease. Note: Serum assay results are often ambiguous on pregnant females and will not be run. New York state clients: Informed consent is required. Please document on the request form or electronic order that a copy is on file.
Quest Diagnostics catalog page

0 of 5 tests selected

Pick one more

Sources

Labcorp test catalog
1 test: codes, specimens, methods, preparation and reference intervals.
Quest Diagnostics test catalog
1 test: codes, specimens, methods, preparation and reference intervals.
LOINC 12914-8
Regenstrief Institute codes that identify the same result across labs.
Search ClinicalTrials.gov for % Hex A
Registered studies that measure % Hex A, on the U.S. National Library of Medicine registry.

Verify these ranges and sources

We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.

Interpret your own results with a licensed clinician, or track your lab history and health goals in Aumnivida.

Spotted an error? Email hello@biomarkerlens.com with the page URL and the primary source that corrects the entry.