Factor V Activity
General Information
Lab Name
Factor V Activity
Lab Code
F5
Epic Name
Factor V Activity (Not for thrombosis eval - see APCR)
Description
This test is NOT for Factor V Leiden or F5DNA. Please see APCR (Factor V Leiden Protein Assay) or F5DNA (Factor V DNA Screen) for those respective tests.
Factor 5 activity is used for diagnosing rare congenital deficiencies of coagulation factor V, investigation of prolonged prothrombin time and evaluating acquired deficiencies associated with liver disease, intravascular coagulation and fibrinolysis.
Synonyms
Factor 5, Factor V
Interpretation
Method
Stago STA Clottable Factor assay
Reference Range
Units: %
| Female | Male | ||
|---|---|---|---|
| Age | Range | Age | Range |
| 0- | 50-150 | 0- | 50-150 |
Interferences and Limitations
Patients on bivalirudin (Angiomax), dabigatran (Pradaxa), argatroban (Novastan), rivaroxaban (Xarelto), apixaban (Eliquis), and edoxaban (Savaysa) may show prolonged clotting times. This may cause an under- estimation of the factor concentrations.
Ordering & Collection
Specimen Type
Collection
3 or 5 mL BLUE TOP (CITRATE) tube
Forms & Requisitions
Outside clients should fill and submit Coagulation Patient Clinical History Form: Coagulation Patient Clinical History Form
Handling Instructions
The Laboratory MUST process specimen, within 4 hrs of blood collection
Quantity
requested: entire specimen
Processing
UW-MT Instructions: Take specimen to UW-MT Coag lab for processing. Coag Tech will freeze plasma sample for transport to HMC Coag.
HMC Instructions: Take specimen to HMC Coag lab for processing.
Outside Laboratory: Centrifuge for 10 minutes, remove plasma & re-spin plasma for another 10 minutes. Decant & Freeze plasma (minimum 1.0 mL) @ -20°C to -80°C. Send frozen on dry ice.
Performance
LIS Dept Code
Coagulation (COAG)
Performing Location(s)
| HMC |
Coagulation
206-520-4600 325 9th Ave, Rm # GWH-47, Seattle, WA 98104-2420 |
|---|
Frequency
Run Monday-Friday. Reported by end of day.
Available STAT?
No
Billing & Coding
CPT codes
85220
LOINC
Interfaced Order Code
UOW1289
Interfaced Result Code
UOW1289