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Test Code GGT Gamma-glutamyltransferase

Aliases

Gamma Glutamyl Transpeptidase, GGTP

Patient Preparation

No special patient preparation required

Collection Method

Venous collection

Minimum Volume

  • Adults: 0.8ml
  • Pediatric: 0.5mL

Container

Lt Green / Plasma Separator / Lithium Heparin

Preferred Specimen

Light Green Top (lithium heparin) plasma

Acceptable Specimens

Serum:

  • Gold Top SST

  • Red Top

Plasma:
  • Light Geen Top (lithium heparin)
  • Purple Top(K2 EDTA)

Reference or Target Ranges

Female 5 – 36 U/L
Male 8 – 61 U/L

Reportable Units

U/L

Critical Value

Not defined for this assay

Reasons for Rejection



<!-- Rejection-->
Hemolysis Threshold
 200 mg/dL
Icterus Threshold
 50 mg/dL
Lipemia Threshold
 1500 mg/dL
Other
 QNS, contaminated, improperly Labeled, improper specimen type

Specimen Stability



<!-- Stability -->
Ambient
 7 days
Refrigerated (4°C to 8°C)
 7 days
Frozen(-40°C to 0°C)
 1 year

Performance Information



<!-- Performance information -->
Days and Time Performed
 24/7
Expected Turn Around Time
 Stat: 1 hour
Routine: 4 hours
Stat Availability
 Yes
Performing Bench
 UH Chemistry, WCH Chemistry
Methodology/Method Description
 Enzymatic colorimetric assay

CPT Codes

82977