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Test Directory

Factor 10a (Xa) Inhibition, Unfractionated Heparin.

Order Name UNFRAC HEP
Test Number 1507100
Revision Date 08/05/12
Test Name Methodology
Factor 10a (Xa) Inhibition, Unfractionated Heparin.
Chrom
SPECIMEN REQUIREMENTS
Preferred Specimen Specimen Volume (min)
2.7 mL
Specimen Type
Whole Blood
Specimen Container
Sodium Citrate 3.2% (Blue Top)
Transport Environment
Ambient whole blood or frozen aliquots
Alternate Specimen Specimen Volume (min)
2.7 mL
Specimen Type
Double Spun Plasma
Specimen Container
Sterile, Capped Plastic Tube
Transport Environment
Ambient whole blood or frozen aliquots
Special Instructions Please indicate anticoagulant therapy.
Tubes must be filled to the proper level, no hemolysis. Improperly filled tubes can give erroneous results.

Whole blood must be transported to SJMC lab within 1 hour of collection.
If specimens cannot be delivered to the SJMC lab within 1 hour of collection, they must be double spun and frozen. Create an aliquot 1.5 ml plasma from each tube into individual plastic aliquot tubes and freeze.
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