Duration of Preoperative Regional Bupivacaine Nerve Blocks

Factors Affecting Duration

• The standard concentration of bupivacaine recommended for peripheral nerve blocks is 0.25%, according to the American Society of Anesthesiologists 1, 2
• The recommended volume for femoral and sciatic nerve blocks is 0.2-0.5 ml/kg, as suggested by the American Society of Regional Anesthesia and Pain Medicine 1, 2
• Adding preservative-free clonidine (1-2 mcg/kg) can extend the duration of blockade, as recommended by the European Society of Regional Anaesthesia and Pain Therapy 1, 2