A Comparative Study of the Effect of Adding Dexmedetomidine, Dexamethasone and Sodium Bicarbonate to Ropivacaine in Ultrasound Guided Supraclavicular Block on the Quality of the Block in Orthopedic Surgery - Golparvar, Mohammad; Mansoori Borooojeni, Aman Allah (Archives of Anesthesiology and Critical Care, 2024)