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
Volume2 mLTypePlasmaContainerSodium citrate (Lt. Blue)Collect Temperature Transport TemperatureFrozenSpecial InstructionsIndicate previous prothrombin and partial thromboplastin time results on requisition.

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
Volume1 mLType Container Collect Temperature Transport Temperature Special Instructions 

Stability

Environmental Condition Description
Environmental ConditionAmbientDescription4 hours
Environmental ConditionRefrigeratedDescriptionUnacceptable
Environmental ConditionFrozenDescription14 days at -20 C; 6 months at -70 C

Days Performed

Mon - Fri

Turnaround Time

1 - 3 days

Methodology

Name Description
NameClotting AssayDescription 

Reference Range

Factor V Assay
Sex Age From Age To Type Range Range Unit
Factor V Assay Sex  DaysAge From1 DaysAge ToNormalType42 - 100Range%
Factor V Assay Sex2 DaysAge From5 DaysAge ToNormalType53 - 134Range%
Factor V Assay Sex6 DaysAge From30 DaysAge ToNormalType73 - 124Range%
Factor V Assay Sex1 MonthsAge From3 MonthsAge ToNormalType57 - 122Range%
Factor V Assay Sex4 MonthsAge From11 MonthsAge ToNormalType65 - 118Range%
Factor V Assay Sex1 YearsAge From5 YearsAge ToNormalType93 - 118Range%
Factor V Assay Sex6 YearsAge From10 YearsAge ToNormalType74 - 108Range%
Factor V Assay Sex11 YearsAge From16 YearsAge ToNormalType65 - 92Range%
Factor V Assay Sex17 YearsAge From99 YearsAge ToNormalType73 - 139Range%
Factor V Assay Sex  YearsAge From99 YearsAge ToUrgentTypeAfter Pathologist Review: < 5Range%

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.