USG for upper limb peripheral nerve blocks

Ultrasound guided nerve block is now becoming the standard practice in regional anaesthesia and has been shown to require less volume of local anaesthetic and reduce the incidence of complications. Median, ulnar and radial nerves are the main peripheral branches of the brachial plexus. Selective blocking of these nerves allows targeted approach and retention of motor power in postoperative period. The nerves can be blocked at multiple levels in upper limb. This articles describes the indications, relevant sonoanatomy and techniques to perform the blocks and recent advances.