Ultrasound-guided supraclavicular brachial plexus block (US-SCBPB) has been a generalized
regional anesthesia in upper extremity surgery. It is performed just above the clavicle, in
which the neural cluster formed by the trunks or divisions of the brachial plexus is situated
superolateral to the subclavian artery (SA).
In many approaches, corner pocket approach [deposit local anesthetic (LA) at the intersection
of the SA, neural cluster, and the first rib] and cluster approach (direct deposit LA into
the neural cluster after penetration of the sheath of brachial plexus) has been well known
methods. And single or multiple injection techniques has been used with the above approaches.