0.5 mL citrated plasma collected as whole blood in blue top tube at least 2/3rds full to the fill line.
Test Description
This test is used to measure the concentration of functional fibrinogen in the plasma.
Interferences: Clotted sample precludes analysis. Citrated Whole Blood (blue top tube) or citrated plasma is the only acceptable sample. The tube should be greater than 2/3rds filled. If submitting separated citrated plasma, label it as Citrated Plasma.