Heparin Mean MW (Da) Anti-Xa / anti-IIa Anti Xa activity /mg UFH 15000 1 193 U Tinzaparin 6500 2 90 IU Dalteparin 6000 2,5 130 IU Enoxaparin 4500 3,9 100 IU Nadroparin 4200 3,5 95 – 130 IU Reviparin 3800 3,25 106 IU Bemiparin 3600 8 80 – 100 IU

Table 1: Heterogeneous effects of the various LMWHs on FXa and FIIa, according to their respective molecular weight [10].