Citrate Must be venous or arterial collection, NOT capillary

• MUST specify the type of heparin being administered e.g.UFH - Standard Heparin or LMWH - e.g. Clexane,


•  Levels taken 4 - 6 hours post dose.  please note time and dose on request if known


• Must arrive in the laboratory within 1 hr collection.

LAB NOTES: RWH Lab must notify RCH lab when dispatching Anti Xa.Add-On Tests - check with Haematology first (see CH-W-148)

As requested