Factor VII Activity (F7) | | | |
EPIC Test Name
FACTOR 7 ASSAY LEVELEPIC Code
LAB305Specimen Requirements
Plasma |
---|
Minimum Volume: | 2.7 mL |
Collection: | Collect using standard laboratory procedures. Tubes must be full to obtain proper blood to anticoagulant ratio or the specimen will be rejected. |
Transport: | Specimens scheduled to arrive in lab in less than 4 hours can be sent at room temperature. Specimens arriving more than 4 hours must be platelet poor specimens and need to be frozen before transport. Place in an insulated container filled with dry ice to ensure that the specimen does not thaw. |
Stability: | Room temp: 4 hours Frozen: 2 weeks at -20 C 6 months at -70 C. |
Container: | Light-blue top (3.2% sodium citrate) |
Processing/Storage: | Specimens that cannot reach the lab within the time frame should be double spun at 2500 g for 15 minutes to obtain platelet poor plasma. 0.5mL aliquots should be frozen in plastic at -20 degrees C. |
Rejection Causes: | Clotted
Insufficent Sample Volume |
Methods
Automated clotting assayTurnaround Time
Specimen | Turnaround Time |
---|
Plasma | Testing is batched |
Reference Ranges
Automated clotting assay
Age | All Range | Unit |
---|
0 day | 28-104 U/dL | U/dL |
1 -5 days | 35-143 U/dL | |
5 days - 1 month | 42-138 U/dL | |
1 - 3 months | 39-143 U/dL | |
3 - 6 months | 47-127 U/dL | |
>6 months | 50-150 U/dL | |
Clinical Indications
Diagnosis of factor VII deficiency. Decreased Factor VII level may be seen liver disease, vitamin K deficiency, and warfarin treatment. Inhibitory antibodies are rare. Useful in the workup of unexplained prolongation of the PT.Common Synonyms
Factor VIIContact Information
Special Testing: (315)464-4460