Astore 2012.

Methods	Randomized controlled trial
Participants	N = 130; Argentinian study
Interventions	Infraclavicular block. Localization method: neurostimulation. Endpoint for injection: a distal motor response of radial or median nerve at a current threshold of 0.3‐0.5 mA. Single injection through needle. Humeral block. Localization method: neurostimulation. Endpoint for injection: motor response of targeted nerve at current threshold of 0.3‐0.5mA. Quadruple injection through needle: median, ulnar, radial, musculocutaneous nerve. Injectate in both blocks: 40 ml of bupivacaine 0.5% and lidocaine 2% in 1:1 ratio with 1:400,000 epinephrine
Outcomes	1. Block success, defined as "complete sensory blockade" after 30 minutes 2. Block performance time, not defined in abstract 3. Block onset time 4. Duration of analgesia for bone surgery 5. Duration of analgesia for soft tissue surgery
Notes	Abstract in conference proceedings; limited methodological information available. Authors did not respond to request for further information.