Efficacy of Variable Volume Truncal Blocks in Upper Limb Orthopedic Surgery

Inclusion Criteria: * ASA 1-2 * Body Mass Index (BMI) of 18-35 kg/m² * Age: 18-65 years -Patients undergoing all upper extremity orthopedic surgeries, except shoulder surgeries (distal humerus, elbow, forearm, hand, and wrist), will be included. - Exclusion Criteria: * Patient refusal * Pregnancy or breastfeeding * Severe pulmonary disease * Contralateral diaphragm paralysis * Nerve injury secondary to trauma * Neuromuscular disease * Peripheral neuropathy * Bleeding diathesis * Allergy to local anesthetics and dexamethasone * Uncontrolled diabetes mellitus * Morbid obesity with BMI \>35 * Severe cardiovascular, renal, or hepatic disease * Infection at the site of the nerve block