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* GAMMA GLUTAMYL TRANSFERASE

Mnemonic

GGT

Synonym

Gamma GT - GGT

Specimen Collection Requirements

Collect

Serum or Plasma, one 5.0 mL gold (SST), 7.0 mL red, or 3.0 mL mint green (lithium heparin, PST) top tube

Handling

Allow serum to clot completely at room temperature (minimum for SST: 30 minutes; minimum for red top tubes: 60 minutes).

Centrifuge and separate serum or plasma from cells within 2 hours of collection.

Preferred Volume

1.0 mL Serum/Plasma

Minimum Volume

0.25 mL Serum/Plasma (0.6 mL minimum whole blood draw)

Transport

Refrigerated (2-8°C)

Rejection Criteria

Grossly hemolyzed specimen

Stability

AFTER SEPARATION FROM CELLS: Ambient (18-26°C): 24 hours; Refrigerated (2-8°C): 7 days; Frozen (≤ -20°C): 1 month

Testing Information

Performed

7 days/week

Reported

24 hours

Method

Enzymatic

Reference Values

Reference Values

Comments

Legacy Laboratory Services has validated the use of lithium heparin plasma with this assay. Lithium heparin plasma has not been approved or cleared by the U.S. Food and Drug Administration (FDA) for use with this test. Legacy is authorized under Clinical Laboratory Improvement Amendments (CLIA) to perform high-complexity testing.

CPT Codes

82977

Last Updated: Thursday, January 5, 2017 03:41:10 AM


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