7Siddik-Sayyid SM, Aouad MT, Jalbout MI. Intrathecal versus intravenous fentanyl for supplementation of subarachnoid block during cesarean delivery [ J ]. Anesth Analg, 2002,95 ( 1 ) : 209 - 213.
8Cheng CH,Yang CP, Wong CS. Epidural fentanyl speeds the onset of sensory and motor blocks during epidural ropivacaine anesthesia [ J ]. Anesth Analg,2005,101 (6) : 1834 - 1837.
9Solomon RE.Synergistic antinoceptive interactions among drugs administered to the spinal analgesia.Anesth Analg,1992,75:734.
