Factor V, Activity
Also known as: F5
Use
Factor V, Activity test is used to evaluate for possible deficiency of factor V. It is crucial in the coagulation pathway, and a deficiency may lead to bleeding disorders. Proper evaluation ensures accurate diagnosis and aids in the management of coagulation disorders. It is not intended for Factor V Leiden testing, which requires ordering the APC Resistance Profile with Reflex to Factor V Leiden or the Factor V Leiden (F5) R506Q Mutation test.
Special Instructions
This test is New York state approved. Use only sodium citrate tubes for specimen collection. Ensure specimen handling guidelines are followed as per hemostasis/thrombosis requirements. Separate specimens must be submitted for multiple tests.
Limitations
The Factor V, Activity test should not be ordered if testing for Factor V Leiden is required, as it does not detect the Leiden mutation. Incorrect specimen handling and delays in freezing could affect the test results. Serum, EDTA plasma, and clotted or hemolyzed specimens are not acceptable as they may lead to inaccurate results.
New York Approved
Methodology
Other
Biomarkers
LOINC Codes
- 3193-0
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Plasma
Volume
2 mL
Minimum Volume
1 mL
Container
ARUP Standard Transport Tube
Collection Instructions
Collect Lt. blue (sodium citrate) tubes. Transfer 2 mL platelet-poor plasma to an ARUP Standard Transport Tube. Separate specimens must be submitted when multiple tests are ordered.
Causes for Rejection
Serum, EDTA plasma, clotted or hemolyzed specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 4 hours |
| Refrigerated | Unacceptable |
| Frozen | 2 weeks |
Other tests from different labs that may be relevant