Sodium Citrate 1.8 mL Paed (Clear/Pale Blue Inner)
Sodium Citrate 1.0 mL Neonate (Pale Blue Top)
Accurate filling of specimen tube essential. Specimens must be transported at room temperature to the Laboratory in a red specimen bag ASAP. (Maximum delay to testing laboratory must not exceed 2hrs) * If several factor assays are requested, e.g. VIII, IX, XI, and XII, 3 x sodium citrate tubes are required for an adult and 2 tubes for a child.
Factor IX has a circulating half-life of ~18 hours. The diagnosis of F IX deficiency in neonates may be confounded by the fact that F IX levels are significantly reduced at birth and may remain so for 6 months. F IX is a Vit K-dependant coagulation protein