Hexosaminidase A Percent and Total Hexosaminidase in Plasma with Reflex to Hexosaminidase A Percent and Total Hexosaminidase in Leukocytes
2008129
 
Patient History For Biochemical GeneticsPatient History For Biochemical Genetics
Ordering Recommendation
 
Mnemonic
HEXO RFLX
Methodology
Quantitative Fluorometry
Performed
Tue
Reported
2-9 days
New York DOH Approval Status
This test will be sent out to a New York DOH approved laboratory.
Specimen Required
Patient Preparation
 
Collect
Yellow (ACD).
Specimen Preparation
Do not transfer whole blood to other containers. Transport  3 mL whole blood. (Min: 1 mL)
Storage/Transport Temperature
Room temperature. Also acceptable: Refrigerated.
Unacceptable Conditions
Grossly hemolyzed specimens.
Remarks
Clinical information is needed for appropriate interpretation. Additional required information includes age, gender, diet (e.g.TPN therapy), drug therapy, and family history. Biochemical Genetics Patient History Form is available on the ARUP Web site at http://www.aruplab.com/patienthistory or by contacting ARUP Client Services. 
Stability
Ambient: 3 days; Refrigerated: 1 week; Frozen: Unacceptable
Reference Interval
Available Separately Components Reference Interval
No Hexosaminidase A Percent in Plasma 55-​76 percent
No Hexosaminidase Total 800-​1400 nmol hydrolyzed/hr/mL
Yes (2008125) Hexosaminidase A Percent and Total in Leukocytes Effectvie November 18, 2013
Greater than or equal to 63 percent
Interpretive Data
Refer to report.  
Note
This test is used for the diagnosis of Tay-Sachs disease and can also be used to identify carriers for this disorder. Carrier screening is offered to individuals of Ashkenazi Jewish descent because of the high incidence of the disease in this population. If plasma results are interpreted within the enzyme ranges of Affected, Carrier, or Ambiguous, then Hexosaminidase A and Total Hexosaminidase in Leukocytes will be added. Additional charges apply.
CPT Code(s)
83080; if reflexed add 83080
Components
Component Test Code*Component Chart Name
2008122Hexosaminidase Total
2008123Hexosaminidase A Percent
2008130Hexosaminidase Interpretation
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, contact interface support at interface.support@aruplab.com.
Cross References