Specimen Requirements

Patient PreparationGive patient 50 g test dose of glucose to ingest. Draw blood specimen for a non-fasting glucose 1 hour following test dose. Some physicians may request a fasting specimen prior to the administration of the test dose.

Specimen Collection

Submit only 1 of the following specimens:

Plasma

Container/Tube: Dark green-top (sodium heparin) tube or light green-top (lithium heparin) tube

Specimen: 1 mL of heparinized plasma

Transport Temperature: Ambient

Collection Instructions: Fasting (8 hour)

Note: 1. Indicate plasma.
2. Label specimen appropriately (plasma).

Serum

Container/Tube: Plain, red-top tube or serum gel tube

Specimen: 1 mL of serum

Transport Temperature: Ambient

Collection Instructions: Fasting (8 hour)

Note: 1. Indicate serum.
2. Label specimen appropriately (serum).