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Test Code: GTT Preferred Name Glucose tolerance test

Results Avail After Hours:No

Urgent:1 hour

Test Frequency:As required

Routine:4 hours

MBS Status:Medicare Item

Min. Re-Test Interval:N/A

Public price:

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Test Tubes

Specimen Type	Specimen Volume	Tube Type
Blood (adult)	2 mL	Fluoride oxalate 2 mL (Grey Top)
Blood (paediatric)	250 µL	Fluoride oxalate 250 uL (Paediatric - Grey Top)
Blood (neonatal)	250 µL	Fluoride oxalate 250 uL (Paediatric - Grey Top)

COLLECTION NOTES

Contact a Chemical Pathologist with any concerns. A routine GTT will require the patient to be at the collection centre for over 2 hours.

PRE-TEST PREPARATION:
1. The patient should not have suffered from any acute illness or been confined to bed during the two weeks prior to the test.
2. The patient must fast from the previous night (8 - 15 hr fast). Water only is allowed.
3. The patient should eat a normal diet for three days prior to the test.
4. Note all medications currently being taken. Drugs significantly affecting glucose tolerance include oestrogens, corticosteroids, thiazides, beta blockers and phenytoin.

Test Code: GTT Preferred Name Glucose tolerance test

Test Tubes

COLLECTION NOTES

GENERAL NOTES