Factor VII, Activity
Also known as: F7
Use
Factor VII, Activity test is used to evaluate possible factor VII deficiency. Factor VII is a crucial protein in the extrinsic pathway of blood coagulation and is necessary for the proper functioning of the clotting cascade. Deficiencies in factor VII can lead to bleeding disorders, making this test significant for diagnosing unexplained bleeding tendencies or for monitoring patients with known deficiency.
Special Instructions
This test has been approved in New York state and requires specific patient preparation and specimen handling as per ARUP's guidelines. It is important to collect the specimen using sodium citrate tubes and to ensure it is critically frozen for transport.
Limitations
This test may not be suitable for patients who have recently been administered anticoagulants as these drugs can potentially affect the outcome of the test. In addition, samples that are clotted or hemolyzed, or those collected in serum or EDTA tubes, are unacceptable and can lead to inaccurate results.
New York Approved
Methodology
Other
Biomarkers
LOINC Codes
- 3198-9
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 using Lt. blue (sodium citrate) tube.
Patient Preparation
Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.
Storage Instructions
CRITICAL FROZEN. 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