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Specimen Collection Manual and Test Catalog

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ACTIVATED PROTEIN C RESISTANCE (FACTOR V LEIDEN CLOT BASED SCREENING ASSAY)

Geisinger Epic Procedure Code:  LAB1515    Geisinger Epic ID:  19435

SPECIMEN COLLECTION
Specimen type: 

Platelet-free plasma


Preferred collection container: 
Alternate collection container: 
Other 3 mL blue-top (3.2% sodium citrate) tube
Specimen required: 

2 mL aliquot of frozen, platelet-poor plasma, (minimum 1 ml)


Special notes: 

Please submit a separate frozen aliquot for this test. It may not be combined with any other test requiring a frozen aliquot.



SPECIMEN PROCESSING
Processing instructions: 

Centrifuge light blue-top tube 15 minutes at approximately 1500 x g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/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/mcL). Freeze immediately and ship on dry ice.


Transport temperature: 

Frozen.


Specimen stability: 

Room temperature: Unacceptable. Refrigerated: Unacceptable. Frozen:30 days


Rejection criteria: 

Received room temperature • Received refrigerated • Clotted specimen • Serum • Gross hemolysis



TEST DETAILS
CPT code(s):  85307
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.

Methodology: 
RVVT-Based Assay (clot-based)
Synonyms: 

Quest test code 22, APC, APC Resistance, Resistance to Activated Protein C, ACTIPROTCRES


Clinical significance: 

The activated protein C resistance test is a clot-based screening test used to - Activated protein C (APC) resistance is the most frequent hereditary defect associated with deep vein thrombosis. Over 95% of the APC resistance phenotype is due to the Factor V Leiden mutation. The APC-Resistance assay is a plasma based functional test for the determination of APC resistance caused by the factor V Leiden mutation.


Review Date:  12/16/2024

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