Abstract
Compared with older agents, low-molecular-weight heparins (LMWH) and fondaparinux
offer improved bioavailability and more predictable, dose-independent clearance. While
routine monitoring of coagulation parameters is not usually necessary with these agents,
certain populations (including pregnant patients, children, obese patients, and patients
with renal impairment) may benefit from the monitoring of anti–factor Xa activity,
thromboelastography, or other coagulation assays to help guide therapy. The chromogenic
anti–factor Xa assay is currently the gold standard for monitoring LMWH and fondaparinux
therapy. Thromboelastography has been used to monitor LMWH therapy in special situations
but is not needed for routine use.
Keywords
low-molecular-weight heparin - fondaparinux - anti-Xa - thromboelastography