Comparison of two neurostimulation techniques for axillary brachial plexusblockade

This prospective, randomized, double-blind study compared two techniques of axillary brachial plexus block using a peripheral nerve stimulator. Both g roups received initial musculocutaneous nerve block followed by either a si ngle injection on median nerve stimulation (group 1) or a double injection divided between median and radial nerves (group 2). All 60 patients receive d a total of 30 ml of lidocaine 15 mg/ml with epinephrine 5 mug/ml. Complet e sensory blockade of all six peripheral nerves occurred in 53% and 97% of patients in groups 1 and 2, respectively (P<0.001), with a more rapid onset of blockade occurring in group 2 patients (P<0.001). Complete motor blocka de was evident in 30% and 83% of patients in groups 1 and 2, respectively ( P<0/001).