Revista española de anestesiología y reanimación
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Rev Esp Anestesiol Reanim · Jun 2002
Randomized Controlled Trial Comparative Study Clinical Trial[Duration and quality of postoperative analgesia after brachial plexus block for shoulder surgery: ropivacaine 0.5% versus ropivacaine 0.5% plus clonidine].
Some authors have found that nerve blocks with local anesthetics may last longer if clonidine is added. The present study analyzed the duration and quality of analgesia provided by an interscalene brachial plexus block for shoulder surgery using 0.5% ropivacaine or 0.5% ropivacaine with added clonidine. ⋯ Adding 40 micrograms of clonidine to 200 mg of 0.5% ropivacaine does not prolong the sensory-motor block or improve the quality of analgesia in the early postoperative period.