The axillary brachial plexus block is a technique of locoregional anesthesia indicated in the distal upper limb surgery : hand, forearm, the lower third of the arm including the elbow. The anesthesia of the posterior and the medial side of the arm requires a selective block of the medial brachial cutaneous nerve and the intercostobrachial nerve, for example to improve the tolerance of the inflatable tourniquet used by the surgeons. There are two techniques to achieve this block : the blind technique (without ultrasound) and the ultrasound-guided technique. At the moment, there are no studies which compare these two techniques. So, the purpose of this study is to determine the effectiveness of ultrasound-guided technique compared to blind technique in medial brachial cutaneous nerve block and intercostobrachial nerve block, in the axilla.
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Number of participants with complete anesthesia in the lower half of the medial cutaneous area of the arm, at time 20 minutes
Timeframe: at time 20 minutes after the achievement of medial brachial cutaneous nerve block and intercostobrachial nerve block
Number of participants with complete anesthesia in the upper half of the medial cutaneous area of the arm, at time 20 minutes
Timeframe: at time 20 minutes after the achievement of medial brachial cutaneous nerve block and intercostobrachial nerve block
Number of participants with complete anesthesia in the lower half of the posterior cutaneous area of the arm, at time 20 minutes
Timeframe: at time 20 minutes after the achievement of medial brachial cutaneous nerve block and intercostobrachial nerve block
Number of participants with complete anesthesia in the upper half of the posterior cutaneous area of the arm, at time 20 minutes
Timeframe: at time 20 minutes after the achievement of medial brachial cutaneous nerve block and intercostobrachial nerve block
Number of participants with complete anesthesia of the arm at time 20 minutes
Timeframe: at time 20 minutes after the achievement of medial brachial cutaneous nerve block and intercostobrachial nerve block