Molecular Pathology Laboratory Network

Factor V Leiden R506Q

Test Code
FVLEI
Test Synonyms
G1691A , R506Q mutations
Associations
Hypercoagulability, Deep vein thrombosis
Methodology
Invader® Assay System
CPT Codes
83891 – Molecular isolation
83892 – Enzymatic digestion
83896 x5 – Nucleic acid probe, each
83903 x1 – Mutation scan
83908 – Amplification each sequence
83912 – Interpretation and report
Turnaround Time
2-3 days
Specimen Requirements
5.0 mL (min. 3.0 mL) whole blood EDTA, ACD accepted
Specimen Stability
  • Stable for 24 hours at 18-25°C
  • Stable 4 days at 2-8°C
  • Storage & Handling
  • Ship specimen ambient
  • If shipment delayed, store at 2–8°C and ship with ice pack. (Do not allow the sample to be in direct contact with the ice pack)
  • Causes for Rejection
    Clotted specimen; Specimen exposed to extreme temperature; Anticoagulant toxic to cells; Insufficient number of cells
    Reference Range
    See report.
    Description
    Used to assist with the evaluation of patients with hypercoagulability including those with a (family) history of deep vein thrombosis or pulmonary embolism.
    References
    1. Kujovich JL. (2009). Factor V leiden thrombophilia. http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=gene∂=factor-v-leiden.
    2. Spector EB et al. (2005). Technical standards and guidelines: Venous thromboembolism (Factor v leiden and prothrombin 20210G>A testing): A disease-specific supplement to the standards and guidelines for clinical genetics laboratories. Genet Med. 7:444-453.
    3. Nagy PL et al. (2004). Molecular diagnosis of hypercoagulable states. Lab Med. 4:214-222.
    Trademarks
    Invader is a registered trademark of Third Wave Technologies, Inc., a wholly owned subsidiary of Hologic, Inc.

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