A Comparative Study of Efficacy of Clonidine and Dexmedetomidine As An Adjuvant to Ropivacaine in Ultrasound Guided Supraclavicular Brachial Plexus Block Vis-À-Vis Onset of Surgical Anaesthesia and Duration of Effect in Upper Limb Surgeries. jmbas [Internet]. 11º de agosto de 2020 [citado 23º de outubro de 2026];8(8):513-20. Disponível em: https://jmbm.in/index.php/jmbas/article/view/250