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Test Compendium

0111: GLUCOSE TOLERANCE TEST, 5 HR

Test Code

  • 0111

Test Synonym

  • 5 HR GTT, GTT 5 HR (FASTING, 1/2 HOUR,1 HOUR, 2 HOUR, 3 HOUR, 4 HOUR, 5 HOUR)

Volume

  • 5 mL (each tube)

Minimum Volume

  • 0.75 mL ( each tube)

Specimen Requirements

  • Plasma / Serum

Container

  • Grey Top Tube Preferred, (Serum Separator Tube acceptable but not preferred due to stability)

Storage

  • Refrigerated

Turn Around Time

  • 1 day

Special Instructions

  • Grey Top Tube For Each Timed Specimen -Indicate If Fasting,1/2 Hr,1 Hr,2 Hr, 3 Hr, 4 Hr, 5 Hr

Specimen Stability

  • Serum (no hemolysis): 8 hours at 15-25 °C, 72 hours at 2-8 °C, Fluoride plasma: 3 days at 15-25 °C