Perioperative Anticoagulation Management

Preoperative Considerations

• The American Urological Association (AUA) recommends discontinuing enoxaparin 24 hours before planned surgical procedures, particularly for patients undergoing neuraxial anesthesia or those at high risk of bleeding, to minimize the risk of bleeding complications 1
• For patients at high risk of venous thromboembolism (VTE), consideration should be given to mechanical prophylaxis during the perioperative period when enoxaparin is held, as an alternative strategy to reduce the risk of thrombotic events 1
• The American College of Chest Physicians (ACCP) provides guidance on perioperative management of antithrombotic therapy, including recommendations for stopping vitamin K antagonists 5 days before surgery, but allows for a briefer interruption period for low molecular weight heparins like enoxaparin used prophylactically 2

Patient-Specific Considerations

• Patients undergoing neuraxial anesthesia must hold anticoagulation for at least 24 hours before epidural or spinal catheter placement/manipulation to reduce the risk of spinal hematoma 1
• Dosage and indication should be considered when determining the optimal timing for discontinuation, with prophylactic dosing (40mg daily) requiring a 24-hour hold and therapeutic dosing (1mg/kg twice daily) potentially requiring a longer hold (24-48 hours) 1
• Patient-specific factors such as renal function, bleeding risk, and thrombotic risk should be taken into account, with patients with impaired renal function potentially requiring earlier discontinuation and those at high risk for VTE potentially requiring bridging or shorter discontinuation periods 1

Procedure-Specific Considerations

• Procedure-specific factors, including high bleeding risk procedures and minor procedures with low bleeding risk, should also be considered when determining the optimal discontinuation period 1
• High bleeding risk procedures may require extending the discontinuation period to 24-48 hours before surgery 1
• Patients with renal impairment (CrCl <30 mL/min) should discontinue enoxaparin 24-48 hours before surgery 1

Postoperative Management

• Enoxaparin should be resumed 12-24 hours after surgery when adequate hemostasis is achieved 1
• Inadequate discontinuation time can lead to increased intraoperative and postoperative bleeding, while prolonged discontinuation may increase VTE risk, especially in high-risk patients 1
• Failure to adjust for renal function can lead to reduced enoxaparin clearance, potentially requiring earlier discontinuation, and overlooking neuraxial anesthesia considerations can lead to spinal hematoma 1

Special Considerations

• Patients at very high VTE risk should consider mechanical prophylaxis during the perioperative period when enoxaparin is held 1
• The following table summarizes the recommended discontinuation periods for enoxaparin:

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