Monitoring unfractionated Heparin
Samples should be centrifuged within 1 hour of collection and tested no longer than two (2) hours from collection at room temperature.
If testing cannot be completed within 2 hours of collection:
Transfer plasma into an aliquot tube using a spot label "NaCit Plasma P.P.P" to label as platelet poor plasma
Frozen (strict) - 2 weeks
Refrigerated - NO
Chromogenic Assay Anti-Xa