Test directory: 3 Hr Glucose Tolerance

Ordering Code180
Test Name3 Hr Glucose Tolerance
Alias3 Hour GTT
Preferred SpecimenSerum
Note: If specimen cannot be properly processed within 1 hour of collection, collect blood in Oxalate/Fluoride (Gray).
Preferred Container2 SS (Serum/Separator - Red/Grey or Gold)
Optimum Volume0.5 mL
Collection InstructionsRequires pathologist approval
Draw a fasting blood sugar before administering 75-gram glucose, and draw blood at one, two, and three hour intervals. Label each tube with patient's name, secondary identifier, and collection time interval (i.e. fasting, one-hour, two-hour, and three-hour).
Handling InstructionsSerum or Heparin Plasma must be separated from cells within one hour from collection. If specimen cannot be properly processed within 1 hour of collection, collect blood in Oxalate/Fluoride (Gray).
Transport RequirementsOahu: Ambient
Airline: Refrigerated
Specimen StabilityAmbient: 24 Hours
Refrigerated: 7 Days
Frozen: 3 Months
Unprocessed Oxalate/Fluoride (Gray) blood is stable for 3 days
Ambient.
Avail. StatNO
Analytic Time1 Day