Antithrombin III Activity

Supply #38445 Light Blue 4.5mL 3.2% SODIUM CITRATE

Test code: 216

CPT code(s): 85301

Methodology: Chromogenic

Clinical Significance: Aids in the detection of hypercoagulable states associated with venous thrombotic episodes. May be useful in patients who apprear to be hyporeponsive to heparin.

Includes: Antithrombin III Activity

Alternative Name(s): Antithrombin III Functional; AT-3 Activity; AT3

Collection Guide: 

Supply: 38445 Light Blue 4.5mL 3.2% SODIUM CITRATE

A completely filled tube is necessary because the correct ratio of blood to citrate is critical (9:1). Mix by gentle inversion 3-4 times.

Preferred Specimen: Platelet Poor 3.2% Sodium Citrate-antigcoagulated Plasma

Preferred Volume: 1mL

Instructions: A completely filled tube is necessary because the correct ratio of blood to citrate is critical (9:1). Mix by gentle inversion 3-4 times. Centrifuge to separate plasma from cells. Remove plasma immediately and freeze

Special Instructions: DO NOT REFREEZE SAMPLES

Transport Container: Pour off Tube

Transport Temperature: Frozen

Specimen Stability: Frozen: 1 week

Reject Criteria:

  • Short Draws
  • Overdraws
  • Clotted Samples

For additional supply or collection device information, please contact DLO's Customer Service at (800) 891-2917, option 2.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed.