Background: Ultrasound-guided supraclavicular brachial plexus block is widely used for upper limb surgeries because it provides effective anaesthesia, prolonged postoperative analgesia, stable haemodynamics, and reduces opioid requirements. Ultrasound guidance improves block success while minimizing complications. Ropivacaine is a long-acting local anaesthetic with lower cardiotoxicity and neurotoxicity than bupivacaine. Dexmedetomidine, an α₂-adrenergic receptor agonist, prolongs postoperative analgesia and improves block characteristics; however, higher doses are associated with bradycardia and hypotension. Therefore, comparing different doses is clinically important.

Ultrasound-Guided Supraclavicular Brachial Plexus Block, Dexmedetomidine, Ropivacaine, Postoperative Analgesia, Upper Limb Surgery, Regional Anaesthesia