A catheter was inserted , and 0.1 % bupivacaine + 2 g/mL fentanyl in 15 mL saline were given to Group bupivacaine-fentanyl ( Group BF ) , while 0.0625 % bupivacaine + 2 g/ml fentanyl + 2 mg morphine in 15 mL saline were given to Group bupivacaine-fentanyl-morphine ( Group BFM ) with no test dosing from the needle .