7Robertson D, Michelakis AM. Effects of anaesthesia and surgery on plasma rennin activity in man. JCESM, 1972, 34(5) :831-833.
8Eddleston JM, Holland JJ, Griffin RP, et al. A double-blind comparison of 0.25% ropivacaine and 0.25% bupivacaine for extra dural analgesia in labor. Br J Anaesth,1996,76(1):66-71.
9Meister GC, D'Angelo R, Owen MD,et al. A comparison d epidural analgesia with 0.125% ropivacaine with fentanyl versus 0.125% bupivacaine with fentanvl during labor. Anesth Analg,2000,90(5) :632 - 637.
10Fischer C, Blanie P, Jaouen E, et al. Ropivacaine 0.1% plus sufentanil 0.5 mg/mL versus bupivacaine 0.1% plus sufentanil 0.5mg/mL using patients-controlled epidtnal analgesia for labor. Anesthesiology,2000,92(4) : 1588 -1593.