Perioperative and regional anesthesia management for patients on anticoagulation presents significant challenges. Blood thinners are typically prescribed for those at risk of clotting, including patients with atrial fibrillation, deep venous thromboses, and mechanical heart valves. The core dilemma involves balancing two risks: abrupt discontinuation can trigger rebound hypercoagulability, while continued anticoagulation during surgery increases bleeding and hematoma formation risks.
Epidural placement represents a particularly critical area requiring careful consideration. “Bleeding risk increases with age, presence of a coagulopathy, abnormalities of the spinal cord, or a prolonged indwelling neuraxial catheter while on anticoagulation.” Management varies by anticoagulant type due to differing pharmacokinetic and pharmacodynamic profiles, and must account for patient-specific and surgery-specific factors.
The American Society of Regional Anesthesia and Pain Medicine (ASRA) provides guidelines for managing anticoagulants during regional anesthesia and catheter removal. For presurgical evaluation, the HAS-BLED score assesses bleeding risk by evaluating hypertension, liver/kidney function, stroke history, bleeding predisposition, INR variability, age, and substance use. Scores exceeding three indicate high bleeding risk and serve as a stratification tool.
Patients with recent venous thromboembolism or ischemic stroke face substantial recurrence risks. Surgery deferral is recommended for three months post-VTE and nine months post-stroke. High-risk patients may require bridging therapy—replacing long-acting anticoagulants like warfarin with short-acting options such as low-molecular weight heparin—though current evidence questions this approach’s efficacy.
Effective perioperative anticoagulation management requires combining validated assessment tools like HAS-BLED with clinical judgment regarding patient factors and surgical timing. Newer oral anticoagulants with reduced monitoring requirements may eventually simplify management while optimizing surgical benefits and minimizing bleeding or thrombotic complications.