NAGR - Specimen: Hexosaminidase A and Total, Leukocytes/Molecular Reflex

Test Catalog

Test Name

Test ID: NAGR    
Hexosaminidase A and Total, Leukocytes/Molecular Reflex

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

If hexosaminidase A is <63%, then TSDP / Tay-Sachs Disease, Mutation Analysis, HEXA will be added and performed at an additional charge.

 

The following algorithms are available in Special Instructions:     

Tay-Sachs Disease Carrier Testing Protocol

Tay-Sachs and Related Disorders Diagnostic Testing Algorithm

Specimen Type Describes the specimen type validated for testing

Whole Blood ACD

Shipping Instructions

For optimal isolation of leukocytes, it is recommended the specimen arrive refrigerated within 96 hours of draw to be stabilized. Draw specimen Monday through Thursday only and not the day before a holiday. Specimen should be drawn and packaged as close to shipping time as possible.

Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Container/Tube:

Preferred: Yellow top (ACD solution B)

Acceptable: Yellow top (ACD solution A)

Specimen Volume: 6 mL

Collection Instructions: Do not transfer blood to other containers.

Forms

1. Biochemical Genetics Patient Information (T602) in Special Instructions

2. New York Clients-Informed consent is required. Please document on the request form or electronic order that a copy is on file. An Informed Consent for Genetic Testing (T576) is available in Special Instructions.

3. If not ordering electronically, complete, print, and send a Molecular Genetics Request Form (T245: available from the supply catalog)

Specimen Minimum Volume The amount of sample necessary to provide a clinically relevant result as determined by the Laboratory.

5 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected

Hemolysis

Mild OK; Gross reject

Lipemia

NA

Icterus

NA

Other

Specimens >96 hours old

 

Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperatures are also included.

Specimen TypeTemperatureTime
Whole Blood ACDRefrigerated (preferred)4 days
 Ambient 4 days