Specimen Type/Requirements

Grey top (Sodium Fluoride) tube - Plasma
 

Patients should not clench and unclench hands before or during phlebotomy. Ideally, a tourniquet should not be used. If a tourniquet is used but the draw is unsuccessful, remove the tourniquet and allow two minutes to elapse before trying again.

Specimen should be centrifuged and aliquoted within 30 minutes of collection.

Test may be affected by gross hemolysis, gross icterus and gross lipemia.