Note: To monitor Low Molecular Weight Heparin (Lovenox, etc.) therapy recommend sample collection 3-4 hours post injection.
One 0.75 mL citrated Blue Top Tube (BTT) plasma aliquot.If more than one coagulation test is ordered, a separate aliquot is needed for each test.-Collect in Citrated Blue Top Tube (BTT)-Citrate anticoagulant must be adjusted for HCT >55%-Tube must be at least 90% full-Invert completely 3-4 times (without shaking) to mix*See Instructions for: Preparation of Platelet Poor Plasma
When measured by the anti-Xa method and samples drawn 4 hours after subcutaneous injection the therapeutic range is:
0.6 - 1.0 IU/mL for twice daily administration and
1.0 - 2.0 IU/mL for once daily administration.