3Oberlander TF,CB,Lam KH,et al.lnafants rolevare spinal anesthesia with minimal overall autonmic changes:analysis of heart rate variability in romer premarure inrants andergoing hernia repair[J].Anesth Analg,1995,80:20-27.
4Scorr DB,LeeA,FanganD,et al.Acutetoxicity of ropivacaine compared with that of bupivacaine[J].Anesrh Analg,1989,69:563.
5Knudsen K,Beckman SunrkulaM.Blombetgs,et al.Central netvous and cardiovascular effecrs of i.v.infusions of oivacaine,bupivacaine and rlacebl in rolunteers[J].Br J Anaesth,1997,78:507-514.