3Solomon RE.Synergistic antinoceptive interactions among drugs administered to the spinal analgesia.Anesth Analg,1992,75:734.
4Sarvela PJ, Halonen PM, Korttila KT. Comparison of 9 mg intrathecal plain and hyperbaric bupivacaine both with fentanyl for cesarean delivery.Anesth Analg, 1999, 89: 1257-1262.
5Reisner CS, Lin D. Anesthesia for sesarean section. In: Chestnut GH,ed. Obstetric anesthesia : principles and practice. 2nd edn. St Louis:Mosby, 1999. 475.
6Glosten B. Anesthesia for obstetrics. In: Miller RD,eds. Anesthesia. 5th edn . New York: Churchill livingstone, 2000.2049.
7Malinovsky JM, Renaud G, Le Corre P, et al . Intrathecal bupivacaine in humans: influence of volume and baricity of solutions. Anesthesiology,1999,91: 1260-1266.
9Reiz S, Haggmark S, Johansson G, et al. Cardiotoxicity of ropivacaine:a new amide local anaesthetic agent. Aca Anaesthesiol Scand, 1989,33 :93-98.
10Van Kleef JW, Veering BT, Burm AG. Spinal anesthesia with ropivacaine: a double-blind study on the efficacy and safety of 0.5% and 0.75% solutions in patients undergoing minor lower limb surgery. Anesth Analg, 1994, 78: 1125-1130.
