Intravenous Dexamethasone as an Adjuvant to Dexmedetomidine After Superior Trunk Block for Arthroscopic Shoulder Surgery

Exclusion Criteria

• •Refusal to participate or inability to provide informed consent Contraindications to peripheral nerve block (e.g., coagulopathy, infection at the injection site) Known allergy or hypersensitivity to study medications (dexamethasone, dexmedetomidine, or local anesthetics) Pregnancy or breastfeeding Chronic opioid use or opioid dependence Pre-existing neurological deficit involving the operative upper extremity Severe hepatic or renal dysfunction Uncontrolled diabetes mellitus Body mass index (BMI) \>35 kg/m² Infection at the planned block site Participation in another interventional clinical trial within the last 30 days