3Kristensen JD,Karlsten R,Gordh T.Spinal cord blood flow after intrathecal injection of ropivacaine.:a screening for neurotoxi effects.Anesth Analg,1996,82 :636-640.
4van Kleef JW,Veering BT,Burm AG.Spinal anesthesia with ropivacaine..a double-blind study on the efficacy and safety of 0.5%and 0.75% solutions in patients undergoing minor lower limb surgery.Anesth Analg,1994,78 :1125-1130.
