Effective Volume of Ropivacaine 0.75% through a Catheter Required for Interscalene Brachial Plexus Blockade

Abstract

Background: Ultrasound guidance during peripheral nerve blocks has allowed for reduction in dose and volume of local anesthetic required to accomplish successful blockade using multiple injections through a needle. The authors undertook this study to determine the minimal effective volume required to accomplish successful interscalene brachial plexus block (ISB) through the catheter.