Surgery planned within 6–24 hours
- Start medical thromboprophylaxis once surgery is planned.
- Prophylactic dose unfractionated heparin (UFH) regimen:
- 5,000 IU UFH SC twice daily (every 12 h) until 6–4 h preoperatively
- Switch to prophylactic dose of low-molecular-weight heparin (LMWH) regimen 12–24 hours postoperatively depending on the individual postoperative bleeding risk
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