3Brogly N, Schiraldi R, Vazquez B,et al. A randomized control trial of patient-controlled epidural analgesia (PCEA) with and without a background infusion using levobupivacaine and fentanyl. Minerva Anestesiol, 2011,30:335-336.
4Tixier S, Bonnin M, Bolandard F, et al. Continuous patient-con- trolled epidural infusion of levobupivaeaine plus sufentanil in labour-ing primiparous women: effects of concentration. Anaesthesia,2010, 65(6) :573-80.
5Norris MC. Are combined spinal-epidtrral catheters reliable. Int Job- stet Anesth,2000,9( 1 ) :3-6.
6Van der Vyvcr M, Halpern S, Joseph G. Patient eontroUed epidural analgesia versus continuous infusion for labour analgesia: a meta-a- nalysis. Br JAnaesth ,2002,89 ( 3 ) :459-465.
7Girgin NK, Gurbet A,Turker G,et al. Intrathecal morphine in anes- thesia for cesarean deliveryt dose-response relationship for combina- tions of low-dose intrathecal morphine and spinal bupivaeaine[ J]. J Clin Anesth ,2008,20 ( 3 ) : 180 - 185.
8Najafi N, VanDeVelde A,Poelaert J,et al. Potential risks of hemolysis after short - term administration of analgesics in chil- dren with glucose -6 -phosphate dehydrogenase deficiency[J]. Tne Journal of Pediatrics, 2011,159 (6) : 1 023 - 1 028.
9Kehlet H, Dahl JB. The value of 'multi - modal' or 'balanced' analgesia n postoperative pain treatment[J]. Anesth Analg, 2010,77(5): 1 048.