HEPARIN, ANTI-Xa ASSAY, BLOOD
Chromogenic
	Test Performed At:
		Barnes –Jewish Hospital Laboratory
	Specimen Required:
		Draw a full, light blue-top (sodium citrate) tube(s), and send sodium citrate whole blood.
		NOTE:			Collect blood 4 hours after last subcue injection.
		Please complete a “Special Coagulation Form” and forward it with the specimen.
	Laboratory Notes:
		Send at room temperature.
	Reference Values:
		Therapeutic range: UFH: 0.3 - 0.6 IUnits/mL
		1.	VTE Prevention 0.1 – 0.2 IUnits/mL
		2.	VTE Treatment without renal impairment
				Q 12 Hour dosing 0.6 – 1.0 IUnits/mL
				Q 24 Hour closing 1.0 – 2.0 IUnits/mL
		3.	VTE Treatment with renal impairment (CRCL <30 mL/min
				Q 24 Hour dosing 0.6 – 1.0 IUnits/mL
	Day(s) Test Set Up:
		Monday - Sunday
	Cut-Off Time:
	Turn Around Time:
		Same day
	CPT Code:
		85520
	Care Manager Order Name:
		Anti Xa Low Molecular Weight Heparin (LMWH) ONCE RTN
	Cerner Order Name:
		Anti Xa LMWH

Last Updated 04/08