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Test Code tTG IgA Anti-human tissue transglutaminase IgA

Useful For

Aids in the diagnosis of Celiac Disease

Patient Preparation

No special patient preparation required

Collection Method

Venous collection

Minimum Volume

2 mL

Container

Gold Top Serum Separator

Preferred Specimen

Serum

Acceptable Specimens

Serum:

  • Gold Top SST
  •  
  • Red Top


Plasma:

 

  • Light Geen Top (lithium heparin)

 

Reference or Target Ranges

<20

<20 Negative
20 – 30 Weak Positive  
>30 Positive

Reportable Units

RLU

Critical Value

Not defined for this assay

Reasons for Rejection

Hemolysis Threshold N/A
Icterus Threshold N/A
Lipemia Threshold N/A
Other QNS, contaminated, improperly labeled, improper specimen type

Specimen Stability

Ambient N/A
Refrigerated (4°C to 8°C) 48 Hours
Frozen(-70°C to 0°C) Indefinitely

Performance Information

Days and Time Performed Tueday, Thursday, and Friday 7 AM – 4 PM
Expected Turn Around Time Within 7 days of arrival in lab
Stat Availability No
Performing Bench ANA
Methodology/Method Description Bioflash – Chemilluminescence

Additional Information/Important Notes

Included in Celiac Panel

CPT Codes

86364