Antithrombin III Activity

What it measures

• Antithrombin III ActivityLOINC 27811-9

Specimen

Specimen

1 mL frozen platelet-poor plasma collected in 3.2% Sodium citrate (light blue-top) tube

Minimum volume

0.5 mL

Container

Transport tube

Temperature

Frozen

Centrifuge light blue-top tube for 15 minutes at approximately 1500 g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet poor plasma into a new plastic vial. Plasma must be free of platelets (Freeze immediately and ship on dry ice.

Turnaround

Set up: Tues-Sun (a.m.); Report available: 4 days

Billing

CPT 85300