Specimen Required

Patient Preparation: 

• Patient should be fasting for at least eight (8) hours before test and no longer than sixteen (16) hours.  Patient cannot eat or drink during test, but water is permitted before and during the test.
• Cigarette smoking will affect results and should be avoided.

Specimen Type: Plasma

Collection Container/Type

Preferred: Grey top (potassium oxalate/sodium fluoride)

Acceptable: Green top (Lithium heparin)

Submission Container/Tube: Plastic vial

Specimen Volume: 3 mL

Collection Instructions: 

1. No fasting sample is collected.
2. Administer 75 grams oral glucose solution.  Ingestion should be completed within five (5) minutes.
3. Draw sample one (2) hours after ingestion of oral glucose.
4. Centrifuge and separate cells after clot formation and within 4 hours of collection. 

Specimen Type: Serum

Collection Container/Type

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 3.5mL

Collection Instructions:

1. No fasting sample is collected.
2. Administer 75 grams oral glucose solution.  Ingestion should be completed within five (5) minutes.
3. Draw sample one (2) hours after ingestion of oral glucose.
4. Centrifuge and separate cells after clot formation and within 4 hours of collection.