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Test Code F5 Factor 5

Important Note

Draw 2 tubes- Must be completely filled.

If transport to the lab will exceed 4 hours: Immediately centrifuge the specimen 2 times and aliquot 2 mL of plasma into a separate plastic vial.  Send specimen frozen.

Performing Laboratory

Memorial Hospital Laboratory- Automated Procedures  304-388-5953       

Specimen Requirements

Plasma- Light Blue Top, Sodium Citrate

Draw 2 full, tubes by “clean” venipuncture (no excessive trauma).

Immediately after draw, invert tubes several times to mix blood with additive.

Specimen Rejection

  • Improperly labeled, collected, stored, and transported
  • Quantity not sufficient
  • Hemolyzed 
  • Marked lipemia
  • Clotted specimens 

Storage and Stability

Room temperature 18-24oC 4 hours
Frozen < -20oC 2 weeks

Reference Values

62.0-139.0% activity

Methodology

Clot detection

Days Test Set Up and Turnaround

Monday through Friday, Batched on Dayshift Only (7:00am to 2:30pm)

Results are available within 48-72 hours

CPT Coding

85220