the Best Approach for Blocking Intercostobrachial and Medial Brachial Cutaneous Nerves in the Upper Arm Surgery

conventional group, 3 to 6 mL of bupivacaine was infiltrated blindly subcutaneously at the same level of the axilla in the anteroposterior direction prior ultrasound group:1 and 2 mL of bupivacaine was injected around each visible nerve branch (Intercostobrachial and Medial Brachial Cutaneous ); if the nerve branches were not visible, 5 mL of the local anesthetic was injected in the subcutaneous area located above the brachial fascia, with a posterior direction, toward the latissimus dorsi muscle.