Test Code LAB9760 Prothrombin (Factor 2) Gene Mutation Detection
Performing Laboratory
Barnes-Jewish Hospital Laboratory
Methodology
This assay utilizes the Cepheid Xpert® FII & FV qualitative in vitro diagnostic genotyping test, as described in the FDA approved assay package insert, for the detection of Factor II alleles from sodium citrate or EDTA anticoagulated whole blood. This test is FDA approved for both Factor V and Factor II, however only the ordered test is analyzed and reported. This test is performed on the Cepheid GeneXpert® Dx System which automates and integrates sample purification, nucleic acid amplification, and detection of the target sequence in whole blood using real-time Polymerase Chain Reaction (PCR) assays based on Scorpion® PCR technology. Note: F2 (NM_000506.3):c.*97G>A is also referred to as G20210A and g.20210G>A in the literature.
Specimen Requirements
Call Barnes-Jewish Hospital Molecular Diagnostics Laboratory at 314-454-8685 for collection instructions.
Form: Molecular Diagnostics Requisition
Specimen Type: Blood
Container/Tube: Lavender top (EDTA)
Specimen Volume: Full tube
Specimen Minimum Volume: 1-2 mL
Collection Instructions: Invert several times to mix blood. Clotted blood is not acceptable.
Additional Information: Specimen cannot be frozen
Day(s) Test Set Up
Tuesday, Thursday
Turnaround Time:
STAT: Director approval required
Routine: 3 to 7 business days
Test Classification and CPT Coding
81240
Reference Values
An interpretive report will be provided.
Specimen Transport Temperature
Specimen should be sent at Ambient temperature or kept refrigerated
Specimen cannot be frozen
Additional Information
For BJH Laboratory Use Only
Alternate Tube:
1 blue-top (sodium citrate) tube
Analyte Stability:
Blood is stable 24 hours at ambient temperature, up to 15 days refrigerated.
Laboratory Processing Instructions:
Test performed in BJH Molecular Diagnostics.