3Huang YF, Pryor ME, Mather L, et al. Cardiovascular and central nervous system effects of intravenous levobupivacaine and bupivacaine in sheep [J] . Anesth Analg, 1998, 86:797.
4Ben- David B, Frankel R, Arzumonov T, et al. Minidoze bupivacaine fentanyl spinal anesthesia for surgical repair of hip fracture in the aged [J] . Anesthesiology, 2000, 92:6.
5Chen ZX, Fang ZY. Study on the dose of bupivacaine during combined spinal - epidural anesthesia for caesarean section [ J ] . J Clin Anesthesiol, 1999, 15 (1): 47.
6Morrison SG, Dominguez JJ, Frascarolo P, et al. A comparison of the electrocardiographic cardiotoxic effects of racemic bupivacainc, levobupivacaine, and ropivacaine in anesthetized swine [ J ] . Anesth Analg, 2000, 90:1308.
