Factor V Assay




Test Mnemonic

FVC

CPT Codes

  • 85220 - QTY (1)

LOINC ®

3193-0

Aliases

  • Labile Factor

Performing Laboratory

Cleveland Clinic Laboratories


Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
2 mLPlasmaSodium citrate (Lt. Blue) FrozenIndicate previous prothrombin and partial thromboplastin time results on requisition.

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1 mL     

Stability

Environmental Condition Description
Ambient4 hours
RefrigeratedUnacceptable
Frozen14 days at -20 C; 6 months at -70 C

Days Performed

Mon - Fri

Turnaround Time

1 - 3 days

Methodology

Name Description
Clotting Assay 

Reference Range

Factor V Assay
Sex Age From Age To Type Range Range Unit
   Days1 DaysNormal42 - 100%
 2 Days5 DaysNormal53 - 134%
 6 Days30 DaysNormal73 - 124%
 1 Months3 MonthsNormal57 - 122%
 4 Months11 MonthsNormal65 - 118%
 1 Years5 YearsNormal93 - 118%
 6 Years10 YearsNormal74 - 108%
 11 Years16 YearsNormal65 - 92%
 17 Years99 YearsNormal73 - 139%
   Years99 YearsUrgentAfter Pathologist Review: < 5%

Special Info

This test should not be confused with Factor V Leiden, a molecular test. 3.2% sodium citrate is the preferred anticoagulant recommended by CLSI.

Clinical Info

To diagnose a bleeding disorder in a patient with a prolonged PT and normal PTT In addition to congenital Factor V deficiency, Factor V levels may be decreased in liver disease and DIC.