ARUP Test Catalog
ARUP Consult Guide
Lab Tests Online
Antithrombin, Enzymatic (Anti-thrombin III) Request

Mnemonic:    [ATIII Rqst]
Name:    Antithrombin, Enzymatic (Anti-thrombin III) Request
Specimen:    1.5 mL plasma from a FULL sodium citrate Blue top tube. Allow tube to fill to proper capacity. Mix immediately by gentle inversion 4 times.
The sample must be centrifuged within 4 hours of collection in a precalibrated, authorized centrifuge. The sample must be doubly spun to insure that it is platelet poor plasma. We recommend that patients be sent to the outpatient phlebotomy lab, so the samples can be processed appropriately.

Hemolyzed samples are unacceptable.
Minimum Spec:    1 mL
Transport Temp:    FREEZE
Spec Stability:    Stable 4 hours ambient.
Ref Lab/Code:    ARUP 0030010
  Method:    Chromogenic
Note:    This is the request for the order. A pathologist must be consulted before the actual test is sent out.

If the request for testing is approved, the order for testing at ARUP is:
Processing Info:    
Give samples to coagulation tech to be spun in the calibrated centrifuge.

Each coagulation test sample must be separately frozen. Send separate specimens when multiple tests are ordered.