Factor XI Activity

Last Modified: 3/25/2019 2:34:33 PM

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

1.0 mL 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.
Transport & Storage: Temperature/Stability: 14 days Frozen
Reference Range: 65-150% 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: 4 to 7 days
Days Performed: Monday, Tuesday, Wednesday, Thursday, Friday
Sites Performed: Quest - Chantilly
PHL Test Code: FCT11
EPIC Test Code: LAB309
Send Out Test Code: 360X / 29143
Alternate Test Names: Factor XI Assay
Included Tests:  
CPT Coding: 85270

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