Grey-top (potassiumoxalate/sodium fluoride) tubes. Note: This test requires 4 separate tubes collected at fasting, 1 hour, 2 hours, and 3 hours post glucose load.
Collection Instructions
1. Patient should be instructed to fast for at least eight hours prior to collection of specimens. 2. Patient should be instructed to refrain from smoking and drinking coffee just before and during test. 3. Draw blood specimen for a fasting glucose. 4. After drawing fasting specimen, give the patient a 100 g dose of Glucola (patient must drink entire beverage within 5 minutes). 5. Draw blood specimens at 1 hour, 2 hours and 3 hours post Glucola ingestion. Note: Label specimens appropriately (fasting, 1 hour, 2 hour, and 3 hour).
