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Laboratory Medicine

Test catalogue

Glucose Tolerance Test, 2hrs Non-Pregnant

Test Name

Glucose Tolerance Test, 2hrs Non-Pregnant

Grey Tube Specimen Type / Requirements

Container Type = Grey Top

Minimum Volume = 2ml plasma

Tube must fill to at least ½ or greater of its vacuum capacity

Specimen Handling

Collection Instructions: Collect sample in Grey top Container, free from hemolysis. Patient must be fasting for at least 12 hours. 75g glucose drink is given to the Patient once the fasting blood is drawned. Ensure patient finish ingesting drink within 5 minutes. 2Hrs after finishing the drink, a second sample is drawn. Blood glucose is taken fasting and 2 hours post ingestion.

Write your initials, date and time of collection on the collection label.

Stability: Stable at room temperature for 8 hours and 3 days refrigerated at 2-8°C.

Transportation: Transport at room temperature ASAP.

Laboratory Staff Instructions: Spin sample as soon as possible.

Sample Rejection Criteria: Grossly hemolyzed samples, Unlabeled or Not Sufficient Quantity samples will be rejected

Required Documentation

Turnaround Time (TAT)

1 Hour

Test Utilization


Reference Value

2h post < 7.8 mmol/L

Test Code



Spectrophotometric (Hexokinase method)

Testing Location


Other Information