Borgeat, A., Aguirre, J., Marquardt, M., Mrdjen, J., Blumenthal, S. Continuous interscalene analgesia with ropivacaine 0.2% versus ropivacaine 0.3% after open rotator cuff repair: the effects on postoperative analgesia and motor function. Anesthesia & Analgesia 2010; 6: 1543-7

PubMed ID: PM:20889941