Specimen Requirement

• The test is administered in the morning following a fast of
  between 8-10 hours. The fasting specimen must be tested and within
  normal range before Trutol is administered.
• The patient should have had at least 3 days of unrestricted
  diet and normal physical activity. Instruct the patient to remain
  seated or reclined throughout the procedure.
• The patient may have water to drink but nothing else. Coffee
  and smoking materials are prohibited.
• The NIH (National Institute of Health) recommends 3 hours
  in pregnant subjects, with an additional specimen collected at the
  first and third hour.
• A physician can request a longer OGTT (Oral Glucose
  Tolerance Test) with different dosages and specimen collection
  intervals. Consult a pathologist when this occurs.

1. Lithium heparin plasma (green) is the specimen of choice. 0.5mL
2. Serum (red/gold) and EDTA plasma (purple) are also acceptable sample types.
3. It is recommended that the serum or plasma be separated from contact with cells within 30 minutes from time of collection.
4. Serum/plasma glucose specimens are stable for 8 hours at 25°C, or 72 hours at 4°C.