Laboratory Medicine
Test Directory / Antithrombin Assay
Antithrombin Assay
Citrated Plasma (& Brown clotted serum, gel barrier if part of a thrombophilia screen)
| Test | Antithrombin Assay |
|---|---|
| Common Abbreviations | AT |
| Profile | Thrombophilia Screen Antithrombin (AT), Protein C (PC), Protein S (PS) Thrombin Time (TT), Factor V Leiden (FVL), Prothrombin Gene Mutation (F2G), Lupus Inhibitor (LIS), Anticardiolipin (ACA), B2 Glyocprotein (B2GLY), Coagulation Screen (CLS) |
| Clinical Indication | Used in conjuction with other tests (within the thrombophilia screen) to screen for underlying causes of venous thromboembolism (VTE). |
| Specimen Type | Blood |
| Sample Type | Citrated Plasma & Brown clotted serum, gel barrier |
| Minimum Volume | 1 x 3mL (adult) 1 x 1mL (paed) (Thrombophlia Screen requires:3 x 3mL (adult) 4 x 1mL (paed) and 1 x brown serum for ACA & B2GLY (citrated plasma must be filled to bottle line) |
| Special Precautions | Tested not suitable if on anticoagulants or within the post thrombotic period |
| Stability | 24 hours |
| Turnaround Time | 3 - 6 weeks |
| Laboratory | York Hospital |
| Reference Interval | Reference range printed on final report. |
| Limitations | Haemolysis, gross lipaemia, high haematocrit may interfere with measurement. Over or under filled samples cannot be used due to ratio between blood and citrate |
| Additional Information |
