Factor XII, Activity FAC12
One adequately filled 3.0 mL light blue (sodium citrate) top tube.
**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).
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.|
Clotted, hemolyzed, collected in wrong tubes, tubes less than 90% full, non-frozen plasma, or exceed stability limits.
Anticoagulant therapy may interfere with results.
|Preferred Specimen Collection Device(s)|