Test directory: Factor X Activity

Ordering Code 4324
Test Name Factor X Activity
Alias Stuart-Prower Factor
Preferred Specimen Plasma
Preferred Container Citrate, 3.2% (Lt Blue)
Other Specimen/Container None
Optimum Volume 2 mL
Collection Instructions Draw 2 full Citrate tubes. Mix tubes well.
Handling Instructions Double centrifuge coag plasma
Separate and freeze immediately
Strict frozen. Do not thaw.
Transport Requirements Oahu: Frozen
Airline: Frozen
Specimen Stability Frozen: 28 Days
Other: Frozen Only
Rejection Criteria Clotted, Hemolyzed, Ambient, Refrigerated, Thawed, Under filled tube, Over filled tube
Avail. Stat NO
Analytic Time Up to 5 Days
Methodology Photometric Clot Detection
Reference Lab  Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of June 29, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Factor X Activity ALL See report.