ANTITHROMBIN ANTIGEN (ATG)
: ATG, AT3 Antigen
: 85 - 135%
: Light blue top (Sodium Citrate)- 2.7 mL
: Citrated plasma - platelet poor. This sample requires double centrifugation if sending a plasma aliquot
: Peds: 2.7 mL; Neonates: 1.8 mL
: 1.0 mL
: 1.0 mL
: Room temperature or send as frozen plasma aliquot if sample will not be received into the lab within 8 hours
: Refrigerated: 8 hours, frozen at -70 C: one month
Reasons for Rejection
: Clotted sample, incorrectly filled tube, grossly lipemic plasma, sample sent as whole blood > 8 hours old
: Monday - Friday
: 8:00 a.m. - 4:00 p.m.
: 4 days
: Cloudy plasma may lead to an underestimation of the antithrombin antigen level.
: Indwelling line should be flushed with saline and 5.0 mL of blood discarded before collecting samples for coagulation assays. Tube must be full and not clotted. Deliver to lab immediately. Samples received from an outside lab must be aliquoted and frozen. Samples aliquoted for shipping must be double centrifuged prior to freezing. Grossly hemolyzed, icteric or lipemic samples may be rejected.
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