Extension of Analgesia by Combined Injection of Dexamethasone and Dexmedetomidine After Arthroscopic Shoulder Surgery

IV injection (1 µg/kg - 100 mL) before anesthetic induction

Perinervous injection between C5 and C6 nerve roots / interscalene block (0.75% - 20 mL)

IV injection (0.15 mg/kg) during anesthetic induction