The name of the anticoagulant being administered must be indicated on the test request. 

Clexane (Enaxoparin), Danaparoid (Orgaran), Apixaban (Eliquis), Rivaroxaban (Xarelto) or Heparin.

For Clexane and Danaparoid monitoring: Collect 2 x 4 mL Sodium Citrate (light blue) tubes 4 - 6 hours post anticoagulant administration. 

For Rivaroxaban and Apixaban monitoring: Collect 2 x 4 mL Sodium Citrate (light blue) tubes) 2 - 3 hours post anticoagulant administration. 

For Heparin testing: Collect 2 x 4 mL Sodium Citrate (light blue) tubes. the specimen must be marked Urgent to avoid Heparin neutralisation.

FXa testing is performed by the Automated Haematology Laboratory upon receipt.