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