Retroclavicular vs Infraclavicular block for brachial plexus anesthesia: a multi-centric randomized trial.

Background: The coracoid approach is a simple method to perform ultrasound-guided brachial plexus regional anesthesia (RA) but its simplicity is counterbalanced by a difficult needle visualization. We hypothesized that the retroclavicular (RCB) approach is not longer to perform when compared to the coracoid (ICB) approach, and improves needle visualization.

Methods: This randomized, controlled, non-inferiority trial conducted in two hospitals, included patients undergoing distal upper limb surgery.