Gamma-Glutamyl Transpeptidase
Testing Information
Sample Type
Serum
Test Codes
630240
CPT Code
82977
Testing Area
Core Lab - Chemistry
Test Methodology
Abbott Alinity - Spectrophotometry and Enzymatic
Reference Range
Female, 0-18 years: 7-21 U/LFemale, >18 years: 8-39 U/LMale, 0-18 years: 7-21 U/LMale, >18 years: 13-60 U/L
Expected Turnaround Time
Results Available 24 hours from Receipt
Specimen Collection Criteria
Collect one gold top SST tube (minimum whole blood: 4 mL). Let specimen clot for 30-60 minutes and then centrifuge to separate serum from cells. Refrigerate after centrifugation.
Rejection Criteria
Grossly hemolyzed specimens, quantity not sufficient, improperly labeled
Specimen Validity and Retention
Centrifuged SST Tubes:Room Temperature (20-25°C): 7 daysRefrigerated (2-8°C): 7 daysFrozen (-20°C or greater): UnacceptableSerum Aliquots:Room Temperature (20-25°C): 7 daysRefrigerated (2-8°C): 7 daysFrozen (-20°C or greater): 7 daysSpecimens retained for 7 days after testing
Courier Transportation
Transport centrifuged tube refrigerated (2-8°C)
Clinical Utility
Gamma-Glutamyl Transpeptidase is a commonly assessed liver enzyme for hepatobilliary disease.
