Factor X Activity Assay  Email this article           Printer friendly page

Primary Name Factor X Assay
Synonym Factor X Functional Assay
Synonym --
Contraction FX
UAB Procedure Number 2500520
CPT Code 85260
Specimen Collect one (1) blue-stopper tube (3.2% sodium citrate), filled to specified volume. Do not underfill or overfill.

Specimen Management Note time of collection and time of last treatment if applicable. Centrifuge blue-stopper tube within 1 hour of collection, separate plasma and test or quick-freeze at -70°C.
Specimen Accepted Daily including weekends
Test Performed Monday-Friday.
Available Stat? Pathologist's approval required.
Description Congenital factor X deficiency is rare and is inherited as one of several autosomal recessive mutations. Acquired factor X deficiency is caused by liver disease, amyloidosis, paraproteinemia, vitamin K deficiency or the use of Coumadin therapy. Factor X deficiency is associated with moderate to severe bleeding.
Reference Interval 50-150%
Critical Value None
Associated With Bleeding disorders
Associated With Vitamin K deficiency
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