الفهرس 
Postoperative painOnly 14 pages are availabe for public view
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Abstract
Regional anesthesia such as BPB involves injection of LA around nerves to specifically block the motor and sensory nerves that supply the operative site, avoiding the need for general anesthesia. Brachial plexus block relies on proper techniques of nerve localization, needle placement, and local anesthetic injection. Blind technique that rely on surface landmarks before needle insertion and elicitation of paresthesia or nerve-stimulated muscle contraction after needle insertion with multiple trial and error needle attempts result in procedure related pain and complications. Supraclavicular approach is one of the different approaches of BPB by different local anesthetics and many studies demonstrated the effects of addition of different substances to local anesthetics to improve the onset, duration of sensory and motor block and prolong the duration of postoperative analgesia. The supraclavicular approach is risky approach because of the high chance of developing pneumothorax. Ultrasound guidance can potentially improve the success rate and reduce the complications. In our study, we aimed to compare the effect of perineural dexmedetomidine versus intravascular dexmedetomidine in ultrasound-guided supraclavicular BPB as regards to onset and duration of sensory and motor block and post-operative analgesia.