GAMMA GLUTAMYL TRANSFERASE (GGT)
Purpose of test:
Provides information about liver disease
Assesses liver function
Distinguishes between bone-and-joint disease and liver disease when
blood alkaline-phosphatase levels are elevated.
Don't eat any food or drink any liquid for at least 12 hours before
the test. Don't drink any alcohol for 48 hours before the test.
Time before test results available:
Test requires only a few minutes in the laboratory. Time before
results are reported to the doctor or patient varies from a few
minutes to a few days.
Men--6 to 37u/liter
Women under 45--5 to 27u/liter
Women over 45--6 to 37u/liter
What "high" or "increased" may indicate:
Acute liver disease
Hepatic metastatic infiltrations
Possibly following myocardial infarction
Taking these drugs may affect test results:
Other factors that may affect test results:
Moderate intake of alcohol causes increased blood-GGT levels that
may last for at least 60 hours.
Failure to fast overnight
If tourniquet is applied on the arm too long (over 1 minute), it
may cause an inaccurate test result. Request another sample to be
collected to ensure accuracy.
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