4Scott DB,Lee A,Fagan D,et al.Acute toxicity of ropivacaine compared with that of bupJvacaine[J].Anesth Anly, ]989, 69, 565-569.
5Kallio H,Snall EV T,Kero MP,et al.A comparison of intrathecaI plain solutions containing ropivacaine 20 or 15mg versus bupivacaine l Orng[J]. Anesth Analg, 2004,99(5). 715-717.