1Brockway MS, et al. Comparison of extradural ropivacalne and bupivacaine[]]. Br J Anaesth, 1991,66: 31 - 37.
2Zarie D, et al. Sensory and motor block during epidural analgesia with 1.0% ,0.75% and 0.5% ropivacaine: a double-blind study[J] .Anesth Analg, 1991,72:509 - 515.
3Groeben H,et al. Lung function under high thoracic segmental epidural anesthesia with ropivaeaine or bupivaeaine in patients with severe obstructire pulmonary disease undergoing breast surgery[J]. Anesthsiology,2002,96(3) :536 - 541.