Factor X Activity

Last Modified: 3/25/2019 2:34:20 PM

Medical Necessity Documentation:  
Client Notes:  
Patient Preparation:  
Specimen Requirements:

1.0 mL Frozen platelet poor plasma from a Blue Top Tube - 3.2% Na Citrate in a Plastic Vial

Collection Instructions:

Centrifuge light blue-top tube for 15 minutes at approximately 1500 x g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid WBS/platelet buffy layer and place
into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into a new plastic vial.
Plasma must be free of platelets (< 10,000/uL). Freeze immediately and ship on dry ice.

Avoid Hemolysis 

Minimum Volume: 0.5 mL Platelet Poor Plasma
Transport & Storage: Temperature/Stability:

14 days Frozen

Reference Range: 70 - 150% of normal
Critical Ranges:  
Test Comments:  
Methodology: Photometric Clot Dectection
Clinical Significance: Bleeding disorders may be due to inherited or acquired deficiencies of a clotting factor.
Custom Panel: No


Turn Around Time: 3 to 5 days
Days Performed: Monday, Tuesday, Wednesday, Thursday, Friday
Sites Performed: Quest - Chantilly
PHL Test Code: FCT10
EPIC Test Code: LAB758
Send Out Test Code: 359X / 29203
Alternate Test Names: Factor X Assay
Included Tests:  
CPT Coding: 85260

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