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Table 2 Weight-based nomogram for continuous intra-vascular UFH infusion

From: The use of activated partial thromboplastin time versus antifactor Xa assay in monitoring continuous unfractionated heparin infusion therapy in obstetric intensive care unit

Anti-Xa Dose adjustment
Less than 0.2 80 U/kg re-bolus and increase infusion rate by 4 U/kg/h
0.2–0.29 40 U/kg re-bolus and increase rate by 2 U/kg/h
0.3–0.7 No change
0.7–0.9 Decrease infusion rate by 2 U/kg/h
More than 0.9 Hold infusion for 1 h and decrease infusion rate by 4 U/kg/h