Test Code: F9 Preferred Name Factor IX

2 hours
1 week
Medicare Item
2 hours

Test Tubes

ImageSpecimen TypeSpecimen VolumeTube Type
Blood (adult)2.7 mlSodium Citrate 2.7 mL (Solid Pale Blue Top)
Blood (paediatric)1.8 mLSodium Citrate 1.8 mL Paed (Clear/Pale Blue Inner)
Blood (neonate)1.0 mLSodium 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

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