Prospective randomized controlled study~There were 4 groups included in our study:~Group N: nerve stimulator guided interscalene brachial plexus block was done Group U: ultrasound guided interscalene brachial plexus block was done Group NU: dual guidance (using both nerve stimulator and ultrasound) Group C: control group We assessed in each group: heart rate, noninvasive blood pressure, time needed for block, onset of sensory and motor power loss and their offset, and finally patient satisfaction.
There are different techniques of interscalene brachial plexus block, we aimed to evaluate the effectiveness of 3 of them as analgesia during shoulder arthroscopy surgery under general anesthesia.