الفهرس 
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Abstract
One of the goals of the anesthesiologist is rendering patients insensible to pain during surgery. Peripheral nerve blocks are used for regional anesthesia, postoperative analgesia and treatment of chronic pain syndromes. Supraclavicular brachial plexus block is indicated in anesthesia for surgery of the arm, elbow, forearm and hand. Different local anesthetics may be used in the block as bupivacaine , lidocaine , mepivacaine and ropivacaine.
Ultrasound guidance has the advantage of real time identification of the neural plexus anatomy, and directly determines the spread of local anesthetic within the plexus sheath. During ultrasound guidance, the structures through which the needle is inserted are defined, and the plexus is directly localized and this will decrease the risk of complications and side effects.