Patients were divided randomly into 3 groups ( Group A : 0.5 % bupivacaine 5 mL , n = 12 ; Group B : 0.5 % bupivacaine 4.5 mL + 20 mg of triamcinolone 0.5 mL , n = 10 ; and Group C : 0.5 % bupivacaine 4 mL + 40 mg of triamcinolone 1 mL , n = 10 ) .