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Factor X, Activity

Mnemonic:    [FactX Act]
Name:    Factor X, Activity
Specimen:    2 mL plasma from a FULL sodium citrate Blue top tube. Allow tube to fill to proper capacity. Mix immediately by gentle inversion 4 times.
The sample must be centrifuged immediately in a precalibrated, authorized centrifuge. The sample must be doubly spun to insure that it is platelet poor plasma. We recommend that patients be sent to the outpatient phlebotomy lab, so the samples can be processed appropriately.

Hemolyzed specimens are not acceptable. FREEZE
Transport Temp:    FREEZE
Ref Lab/Code:    ARUP 0030105
Reference Range:    65-153%
 Reference intervals are for normal adults.
  Method:    Clotting
Note:    Do not order for Factor Xa level. Refer to XA-LMWH (low molecular weight), XA-ORGA (Orgaran), or XA-UAF (unfractionated).
Processing Info:    Give samples to coagulation tech to be spun in the calibrated centrifuge.

Each coagulation test sample must be separately frozen. Send separate specimens when multiple tests are ordered.