Dexmedetomidine Versus Propofol in Conjunction With Regional Block for Shoulder Arthroscopy

patients in both groups are programmed for an elective shoulder arthroscopy surgery

patients in both groups received regional block for anesthesia: brachial plexus blockade was performed using the interscalene approach under ultrasound combined to nerve stimulation. 20 ml ropivacaine 0.375% were injected.

propofol 10mg/ml was used for sedation as described in the arms section

Dexmedetomidine was diluted to 4mcg/ml and used for sedation as described in the arms section

sedation level was monitored using bispectral index to achieve values described in the arms group