Motor Sparing Supraclavicular Block

"Block will be performed in semi-sitting position with head tilted to the opposite side of injection site. linear probe (4-12MHz) (Mindray Digital Ultrasonic Model DP-10 SN 6N-49005130 2014-09. SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO.LTD) will be placed parallel to the clavicle in the supraclavicular fossa visualizing the subclavian artery is seen beating above the first rib. A volume of 2 mL lignocaine 2% will be infiltrated subcutaneous before the block. A 20-gauge needle will be advanced in plane aiming to the corner pocket towards the deeper portion of the brachial plexus at the angle between the first rib and the subclavian artery, 10 mL of drug will be injected. Then, the needle will be retracted and advanced at a shallower angle, aiming toward the superficial plexus after negative aspiration another 10 ml will be injected, total drug injected 20 ml (18 mL of drug will be injected with addition to 8mg dexamethasone (2ml))"