Gamma Glutamyl Transferase
3011
cpt
normal turn-around time
assays included
specimen type
minimum required
GGT
82565
24 hours
GGT
Serum or Plasma
1 mL of serum or heparinized plasma
collection instructions
Collect blood in a serum separator tube (SST) or a lithium heparin or EDTA tube.
Allow the blood to clot at room temperature for 30 minutes if using an SST.
Centrifuge and separate serum or plasma from cells within 2 hours of collection.
Transport the specimen at 2-8°C if not tested within 2 hours.
collection instructions
Hemolysis: Red blood cell destruction can affect test results.
Clotted Specimen: Plasma specimens must be anticoagulated.
Improper Labeling: Specimen must be labeled with at least two patient identifiers.
Insufficient Quantity: Volume less than 1 mL may not be sufficient for all tests.
Delayed Transportation: Specimens must be processed and tested within the specified time frame to ensure accuracy.
Serum or plasma must be separated from cells within 2 hours and kept refrigerated if there is any delay in testing.
Lipemia: Excessive fat in the blood can interfere with certain test results
clinical significance
The Gamma-Glutamyl Transferase (GGT) test measures the level of GGT enzyme in the blood, which is primarily produced by the liver and bile ducts. Elevated levels of GGT may indicate liver disease, bile duct obstruction, alcohol use, or certain medications affecting the liver. It is often used in conjunction with other liver function tests to assess liver health and function.