For prescribing information on prophylactic and therapeutic doses of Low Molecular Weight Heparin (LMWH) referred to in this table, see here.
| Day of procedure | ||
| Low risk of thrombosis | High risk of thrombosis | Extremely high risk of thrombosis |
| If adequate haemostasis, consider prophylactic dose low molecular weight heparin (LMWH) at 6pm (or 4 hours post-op, whichever is later). | ||
| Post-operative anticoagulation day +1 and subsequent days | ||
| Low risk of thrombosis | High risk of thrombosis | Extremely high risk of thrombosis |
|
If bleeding risk remains high, consider prophylactic dose LMWH at 6pm. When bleeding risk is low (generally day 2 onwards), proceed as below. (If bleeding risk remains high in patients at extremely high risk of thrombosis on day 2, the case should be discussed with a cardiologist to allow the approach to bridging to be individualised). |
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| Post Discharge | ||
| Low risk of thrombosis | High risk of thrombosis | Extremely high risk of thrombosis |
|
Stop prophylactic dose LMWH on discharge, even if INR not within therapeutic range. Arrange INR monitoring as appropriate. |
Continue therapeutic dose LMWH on discharge until INR is ≥2. Arrange INR monitoring as appropriate. |
Continue therapeutic dose enoxaparin 1mg/kg TWICE DAILY on discharge until INR is ≥2. Arrange INR monitoring as appropriate. |
Guideline reviewed: August 2025
Page updated: July 2026