Objective: To evaluate the effectiveness of initial implementation of untrasound-guided brachial plexus blockage. Subjects and methods: In 30 patients undergoing upper limb surgery from arm to hand with ASA I, II, aged from 16 to 81 at Hue Central Hospital from 8/2011 to 2/2012. The untrasound-guided interscalene brachial plexus was performed with 20 ml of 1 percent lidocaine mixed with adrenaline 150mcg. The sensory and motor evaluated by Hollmen score, including paresthesia, the onset and duration of sesorry, motor blockage, the success rate and and complications were noted. Result: The mean onset of sensory and motor blockage were 5.30 + or - 1.53mins, 17.76 + or - 3.58mins. Mean duration of sensory and motor blockage were 123.46 + or - 12.64, 152.33 + or - 15.41. The success rate was 96.70 percent good, 3.30 percent quite good, no failures and major complication occurred in the study group. One cas has broken nerve sheath because of too strong pump. Conclusion: The untrasound-guided interscalene brachial plexus blockage lead to a high success rate (96.70 percent good, 3.30 percent qiute good), a short onset and a long duration of sensory and motor blockage with the use of low volume of local anesthetic.