Factor V Activity
| Profile or Test Panel |
Extrinsic Factor (abnormal PT) Evaluation Profile
|
| Method | Clottable |
| Test Information | A one-stage extrinsic system clotting assay is used to measure the factor V level. Clotting times of dilutions of patient plasma are compared to dilutions of a plasma pool from normal donors, when added to deficient plasma. Levels are reduced by hereditary or acquired factor V deficiency, factor V inhibitor (including those seen after use of topical bovine thrombin), liver disease, or disseminated intravascular coagulation (DIC). The factor V (Leiden) mutation associated with activated protein C resistance does not affect factor V activity and is tested by separate kinetic or DNA testing (described later). |
| Additional Test Information | Normal ranges are included on testing report and can be made available upon request. |
| Sample Requirements | Whole Blood: 3.2% sodium citrated (blue top) OR frozen plasma. |
| Requested Volume | Two 5 ml 3.2% sodium citrated (blue top) tubes as whole blood OR frozen plasma in 4 X 1mL aliquots in plastic tubes |
| Minimum Volume or Pediatric Volume | Frozen Plasma: at least 0.5ml in 2 plastic tubes. |
| Sample Information | 全血是优选的测试，但如果不可能将整个血管送到这里的2小时内到达，则发送冷冻等离子体。要在1500g下准备等离子体离心蓝色顶管15分钟，并将血浆拆下第二次以1500克离心15分钟。将约1ml等分等分等分为4个塑料管，冻结。 |
| Shipping Information | Whole Blood: Send at ambient temperature (18-25C) and must be received within the lab in less than or equal to 2 hours after collection. Frozen Plasma: Send on dry ice. Send samples to: For additional information, please seeOrdering Information |
| Requisition Form | RFT- Hemostasis Reference Laboratory |
| Transaction Code | 3210-11 |
| CPT Codes | 85220 |
| Test Schedule | Monday – Friday |
| Turn around Time (analytic time) | 3 Business Day |
| Report/Results | Fax number required to receive report |
