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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.