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Test Code LAB85 Gamma Glutamyltransferase (GGT), Plasma

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

Enzymatic

Literature Reference:

Package insert: Gamma-glutamyltransferase GGT-2 liquid reagent. Roche Corporation, 01/2022.

Specimen Requirements

Specimen Type: Plasma
Container/Tube: Mint-green top (lithium heparin)
Specimen Volume: Full tube
 

Day(s) Test Set Up

Monday through Sunday
Turnaround Time:
STAT: 1 hour after receipt in laboratory
Routine: 2 to 4 hours after receipt in laboratory

Test Classification and CPT Coding

82977

Reference Values

Males
0 - 3 months: 20-200 Units/L
> 3 months - 1 year: 5-115 Units/L
> 1 year - 12 years: 5-35 Units/L
> 12 years: 10-50 Units/L

Females
0 - 3 months: 20-200 Units/L
> 3 months - 1 year: 5-115 Units/L
> 1 year - 12 years: 5-35 Units/L
> 12 years: 5-35 Units/L

Unknown
0 - 3 months: 20-200 Units/L
> 3 months - 1 year: 5-115 Units/L
> 1 year - 12 years: 5-35 Units/L
> 12 years: 10-35 Units/L

 

Literature References:

1. Szasz G, et al: Clin Chem. 15, 124, 1969.

2. Rifai N, Horvath AR, Wittwer AT eds: Textbook of Clinical Chemistry and Molecular Diagnostics 6th ed: Chapter 61, p. 1348, Elsevier, St. Louis, MO 2018.

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Specimen Transport Temperature

Ambient

Additional Information

For BJH Laboratory Use Only
Alternate Tube:

1 dark green-top (lithium heparin) tube
1 lavender-top (EDTA) tube

1 red-top tube

 

Laboratory Processing Instructions:

Test performed in BJH Core Lab.  Processed by automated line for delivery to the Cobas 8000. Completed specimens are stored refrigerated for 5 days. 

Test performed in Ambulatory Cancer Building Lab.  Centrifuge sample and deliver to the Cobas.  Completed specimens are stored refrigerated for 5 days. 

Special Instructions

See Analyte Stability Chart under General Information for a complete list.

LOINC Code Information

Name LOINC Code
Gamma glutamyl transferase 2324-2