Test Code: F10 Preferred Name Factor X

2 hours
1 week
Medicare Item
2 hours

Test Tubes

ImageSpecimen TypeSpecimen VolumeTube Type
Blood (adult)2.7mLSodium 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. II, V,VII and X, a total of 3 x sodium citrate tubes are required for an adult and 2 tubes for a child


Factor X has a biological half-life of 40 hours. Acquired deficiency is most commonly seen in Vit K deficiency/antagonism, and liver disease. Isolated F X deficiency has been reported in association with respiratory infections, AML, myeloma, and other malignancies. F X deficiency in patients with amyloidosis is due to adsorbtion of F X onto amyloid fibrils - these patients may have F X levels from 2-50%

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