Factor XII Activity

Last Modified: 9/22/2021 2:23:23 PM

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

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

Collection Instructions: Please submit a separate, frozen vial for each special coagulation assay ordered. 

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: Unacceptable Ambient
Unacceptable Refrigerated
28 days Frozen
Rejection Criteria: Hemolysis
Reference Range: 75% - 150%
Critical Ranges:  
Test Comments:  
Methodology: Photometric Clot Dectection
Clinical Significance:  
Custom Panel: No


Turn Around Time: 1 to 4 days
Days Performed: Monday, Wednesday, Friday
Sites Performed: Quest - Chantilly
PHL Test Code: FCT12
EPIC Test Code: LAB310
Send Out Test Code: 362X / 29153
Alternate Test Names: Factor XII Assay
Included Tests:  
CPT Coding: 85280

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