Antithrombin III Activity

Overview

  • EPIC Code:
  • LAB311
  • Soft Test Code:
  • THRM3
  • Send Out Test Code:
  • 216

Specimen Collection & Preparation

Specimen Requirements

1.0 mL Plasma from a Blue Top Tube - 3.2 % Sodium Citrate in a Plastic Vial


Alternate Specimen

 


TransportAndStorage

1 month Frozen


Collection Instructions

Draw blood in light blue-top tube containing 3.2% sodium citrate, and mix gently by inverting 3-4 times. 
Centrifuge 15 minutes at 1500 x g within 1 hour 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(s). 
Freeze immediately and transport on dry ice.

Avoid Hemolysis 

Avoid presence of microclots


Minimum Volume

0.5 mL


Neonatal Volumne

Clinical Interpretation

Reference Range:

1 day to 1 month: 41-108 % normal
31 days to 2 months: 50-120 % normal
3 to 5 months: 73-120 % normal
≥ 6 months: 80-135 % normal


Methodology:
  • Chromogenic Substrate

Production Schedule

Sites Performed
  • Quest - Chantilly
Days Performed
Monday
Tuesday
Wednesday
Thursday
Friday
Departments
  • Sendouts - Clinical
Turn Around Time

2 to 5 days


Coding & Compliance

CDM

01427365


CPT Coding

85300