Ordering Recommendation

Recommended test to detect antithrombin deficiency.

Mnemonic
AT3
Methodology

Chromogenic Assay

Performed

Sun-Sat

Reported

1-2 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.

Specimen Preparation

Transfer 1.5 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1 mL)

Storage/Transport Temperature

CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.

Unacceptable Conditions

Serum. EDTA plasma , clotted or hemolyzed specimens.

Remarks
Stability

Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: 1 month

Reference Interval
Age Reference Interval
1-4 days 39-87%
5-29 days 41-93%
30-89 days 48-108%
90-179 days 73-121%
180-364 days 84-124%
1-5 years 82-139%
6 years 90-131%
7-9 years 90-135%
10-11 years 90-134%
12-13 years 90-132%
14-15 years 90-131%
16-17 years 87-131%
18 years and older 76-128%

Interpretive Data



No compliance statements are in use for this test.

Note
Hotline History
N/A
CPT Codes

85300

Components
Component Test Code* Component Chart Name LOINC
0030010 Antithrombin, Enzymatic (Activity) 27811-9
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Antithrombin Activity, Plasma
  • Antithrombin III Activity
  • Antithrombin III, Functional
  • AT III Activity
  • AT III Activity/Functional
  • AT3 Activity
  • AT3 Activity/Functional
Antithrombin, Enzymatic (Activity)