Anti-Xa assay

Anti-Xa (Heparin)

Haematology - Coagulation

LMWH therapy

1.4ml venous blood, citrate (0.5ml neonatal coagulation bottles are unsuitable for this test)

Fill exactly to the line indicated on the bottle. Sample must arrive within I hour of collection. 0.5ml neonatal coagulation bottles are unsuitable for this test. Capillary samples are unsuitable for coagulation tests. If the sample is not taken by a peripheral route, it is essential to avoid heparin contamination. Samples must be taken 4-6 hours post last dose of low molecular weight heparin. Please contact the laboratory prior to sending samples

4 hours

Heparin

Yes