Fig. 1From: Retroclavicular vs Infraclavicular block for brachial plexus anesthesia: a multi-centric randomized trialStudy flow chart summarizes overall experimental design. A total of 163 patients were originally assessed for eligibility, from which 109 were analyzed. Grouping and dropout causes are indicated. Reason of exclusion for needle angle and visibility: improper image quality; Reason of exclusion for total anesthesia time: minimal sensitive block not obtained at 30 min. RCB, retroclavicular and ICB, infraclavicular approachBack to article page