Sign In
Labcorp Oklahoma, Inc.
Test Directory


Index:

Factor 10a (Xa) Inhibition, Unfractionated Heparin.

Order Name UNFRAC HEP
Test Number: 1507100
Revision Date 03/14/2016
Test Name Methodology LOINC Code
Factor 10a (Xa) Inhibition, Unfractionated Heparin.
Chromogenic 3274-8 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 2.7 mL Whole Blood Sodium Citrate 3.2% (Blue Top) Room Temperature
Alternate 1 1.5 mL Double Spun Plasma Sterile, Capped Plastic Tube Frozen
Instructions Please indicate anticoagulant therapy.
Each 2.7mL Sodium Citrate 3.2% (Blue Top) tube must be filled to the proper level, no hemolysis. Improperly filled tubes can give erroneous results.
Draw any time if the patient is on IV /Drip - Deliver to lab immediately!

Whole blood must be transported to SJMC lab within 1 hour of collection. If testing cannot be started fresh specimen within 1 hour of collection the specimen must be double spun then 1.5mL plasma aliquot from each tube into individual plastic aliquot tubes and freeze within 2 hours of collection for transportation. Do not pool aliquots together!
GENERAL INFORMATION
Testing Schedule Daily 
Expected TAT 1 Day  
Clinical Use The assesment of the anti-Xa effect of heparin by this method gives a high sensitivity in detecting Unfractionated Heparin levels. 
CPT Code(s) 85520
Lab Section Coagulation