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Test Code LAB723 Tissue Transglutaminase Antibody IgA

Important Note

As of June 2018, this test will contain automatic reflex to Total IgA and Deamidated Gliadin Peptide IgG, when total IgA is low as detected by the testing platform (BioPlex 2200).

Clinical System Name

Tissue Transglutaminase Antibody IgA

Synonyms

Celiac Screening

TTG

TTG IgA

TRANSGLUT

Sample Requirements

Specimen: Whole blood

Container(s): Gold SST, Gold Microtainer, Red

Preferred Vol: 1 mL

Minimum Vol: 0.5 mL

 

Note:

 

Processing Instructions

Reject due to: Visible hemolysis

Spin: Y

Aliquot: Y

Temp: 2-8 C

Storage location: Transfer serum to plastic aliquot container affixed with larger Cerner label. Refrigerate in CPA FrigF rack.

 

Off-site collection: Spin blood, transfer serum to plastic aliquot container. Refrigerate specimen.

Stability

Specimen Type Temperature Time
serum  Room temp  
  Refrigerated 7 d
  Frozen 8 m

 

Availability

STAT Performed TAT
N M-F 1 - 3 d

 

Performing Laboratory

Seattle Children's Laboratory    

 

Department

Department:  Chemistry

Location: Chem East

Phone Number: (206) 987-3694

 

 

 

CPT Codes

86364

Methodology

Method: Immunoassay on Bioplex 2200

Analytical Volume: 100 mcL serum

Limitations:  Visible hemolysis causes a false decrease in measured tTG.

Reference Range

 

  Units/mL
Negative < 15
Positive > 15

 

Description

First-line test recommended for diagnosing Celiac Disease.