Factor XII, Activity FAC12
| Method(s) | Clot Detection |
|---|---|
| Specimen Required | |
| Collect | One adequately filled 3.0 mL light blue (sodium citrate) top tube. |
| Transport | **TIME SENSITIVE** For specimens that cannot be shipped to the laboratory to arrive within 4 hours of collection, see Collection and Processing of Coagulation Specimens information (link below). |
| Remarks | Draw blood into citrate (light blue) top tube filled to the proper level (1 part anticoagulant to 9 parts blood). Invert tube 3 to 4 times to avoid clotting. |
| Stability | Ambient, Refrigerated: 4 hours. Frozen platelet-poor plasma: 2 weeks. |
| Unacceptable Conditions | Clotted, hemolyzed, collected in wrong tubes, tubes less than 90% full, non-frozen plasma, or exceed stability limits. |
| Schedule | Thur |
| Billing Code | 4010128 |
| CPTCode | 85280 |
| Notes | Anticoagulant therapy may interfere with results. |
| Preferred Specimen Collection Device(s) | |
| Reference Interval | |
|
72-155 seconds. |
|
