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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.

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