| Label Mnemonic: | ENOX |
| Epic code: | LAB316 |
| Order form: | Laboratory Requisition |
| Supply order: | Supply Order Form |
| Billing: | Billing Policies |
| CPT code: | 85520 |
 |
| Light Blue top tube 1.8 mL (Na Citrate) |
Full draw; 1.8 mL in light blue-top (3.2% sodium citrate) tube. Mix well.
The therapeutic range for low molecular weight heparins (LMWH) varies with the type and manufacturer, but for adults is typically 0.4 – 1.1 U/mL. For adults, the target range for VTE prophylaxis is 0.2 – 0.4 U/mL.
Patient medications must be recorded on the laboratory requisition.
Double-centrifuged specimens are critical for accurate results as platelet contamination may cause spurious results.
High doses of low molecular weight heparin with low anti-Xa results could be due to low antithrombin activity.
Anti Xa activity by chromogenic substrate without antithrombin supplementation.
Assay updated to Siemens Innovance reagent on 03/05/19.
0.5 mL platelet poor plasma needed for testing.
Immediately centrifuge specimen at 3500 RPM for 12 minutes.
Using a plastic transfer pipette, carefully remove plasma from cells avoiding the platelet/buffy coat.
Place plasma into a labeled plastic tube.
Centrifuge plasma again at 3500 RPM for 12 minutes.
Remove the top of the plasma and place into a labeled plastic tube.
Freeze double-spun plasma within 4 hours of collection time at -20 degrees C or below.
Place requisition into outside pocket of bag.
Place dry ice on top of specimen in Styrofoam container to maintain frozen temperature.
Samples received thawed will be cancelled.
Hemolysis Chart
Phlebotomy Tubes and Order of Draw
Impact of Common Anticoagulants on Coagulation Tests